{ "url": "https://www.bilibili.tv", "auditedAt": "2026-07-21T15:38:47.871Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete remote audit across home, media detail, playback, and UGC video archetypes.", "page": { "appType": "hybrid", "framework": "Vue/Vite-style client application with server-rendered detail pages", "notes": "Home is a 1% raw-content JS shell; media detail retains 75% raw/rendered content. Anonymous playback and region-unavailable states sampled." }, "evidenceUsed": [ "screenshots", "DOM+computed-style", "layout-metrics", "evaluate-probes", "discoverability", "HAR", "DevTools trace", "Lighthouse", "headers", "cookies", "trackers", "secrets", "images", "heap snapshots", "robots.txt+sitemap" ], "guidanceConsulted": [ "dark-mode", "component-specific-light-dark-theme", "accessibility", "adapt-scrollbar-to-contrast-preferences", "same-document-transitions", "cross-document-transitions", "group-element-transitions", "faster-spa-view-transitions", "scrollytelling", "parallax-scroll-effects", "scroll-entry-exit-effects", "carousel-slide-effects", "physics-based-easing", "individual-transform-properties", "animate-element-entry-exit", "animate-to-from-top-layer", "animate-to-intrinsic-sizes", "dynamic-sibling-animations", "interactive-content-reveal", "pull-to-reveal", "swipe-to-remove", "shrinking-header-on-scroll", "scroll-progress-indicator", "scroll-position-aware-elements", "scroll-snap-realtime-feedback", "scroll-snap-state-sync", "scroll-target-on-load", "soft-edge-content-fade", "scrollability-affordance-hints", "anchor-positioning-tab-underline", "position-aware-tooltips", "interest-triggered-tooltips", "interest-triggered-action-previews", "directional-navigation-transitions", "carousel-snap-highlights", "navigation-drawer", "stack-drill-down", "persistent-app-tours", "persistent-toast-notifications", "light-dismiss-a-dialog", "platform-controls-dismiss-dialog", "declarative-dialog-popover-control", "animated-select-picker", "branded-select-styling", "brand-consistent-forms", "custom-select-picker-layouts", "rich-media-picker", "complex-shapes", "shaped-cutouts", "overflow-clipping-control", "visually-texture-content", "apply-webgl-shaders", "interactive-content-in-3d-scenes", "highlight-text-ranges", "prevent-text-wrapping", "customize-scrollbar-color-and-thickness", "export-html-media-from-canvas", "fluid-scaling", "calculate-with-intrinsic-sizes", "css-layout", "size-aware-styling", "content-based-styling", "child-state-based-styling", "design-token-reactivity", "dynamic-sibling-styling", "form-fields-automatically-fit-contents", "improve-text-layout-and-legibility", "forms", "custom-button-actions", "accessible-error-announcement", "required-field-feedback", "validate-input-after-interaction", "identify-inp-causes", "schedule-tasks-by-priority", "optimize-preload-priority", "improve-next-page-load-performance", "interactions-in-complex-layouts", "performance", "visually-stable-font-fallbacks", "break-up-long-tasks", "identify-heavy-scripts", "optimize-script-priority", "defer-rendering-heavy-content", "defer-work-until-scroll-ends", "optimize-image-priority", "conditional-async-dependencies", "expose-canvas-content-to-browser-features", "move-dom-element-without-losing-state", "precise-text-alignment", "visually-stable-mixed-fonts", "css", "html", "reduce-style-repetition", "security", "privacy", "batch-analytics-events", "full-session-analytics", "calculate-total-foreground-time", "passkeys", "passkey-registration", "passkey-authentication", "passkey-reauthentication", "passkey-conditional-create", "passkey-management", "flicker-free-client-side-ab-testing", "consistent-cross-document-transitions", "stabilize-reactive-state", "resilient-context-menus-and-nested-dropdowns", "persistent-top-layer-ui", "detect-initial-visibility-state", "sequence-distributed-events", "translator", "language-detection", "support-global-calendar-systems", "capture-location-agnostic-data", "format-human-readable-durations", "manage-recurring-intervals", "calculate-event-differentials", "coordinate-global-events", "model-partial-time-concepts", "search-hidden-content", "select-menu-interaction", "style-parent-with-has", "autofill-address-form", "autofill-payment-form", "autofill-sign-in-form", "autofill-sign-up-form", "autofill-highlight-inputs", "deliver-optimized-decorative-images", "resolution-optimized-pseudo-elements", "deprioritize-background-fetches", "efficient-background-processing", "webmcp", "agentic-forms", "agentic-javascript-tools", "language-model", "summarizer" ], "artifacts": [ { "type": "other", "path": "evidence/guidance-list.json", "caption": "guidance list", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-1.md", "caption": "guidance retrieve 1", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-2.md", "caption": "guidance retrieve 2", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-3.md", "caption": "guidance retrieve 3", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-4.md", "caption": "guidance retrieve 4", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-5.md", "caption": "guidance retrieve 5", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-6.md", "caption": "guidance retrieve 6", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-retrieve-7.md", "caption": "guidance retrieve 7", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-searches.jsonl", "caption": "guidance searches", "findingIds": [] }, { "type": "heap", "path": "evidence/heap-summary.json", "caption": "heap summary", "findingIds": [ "F43" ] }, { "type": "screenshot", "path": "evidence/home-contrast.png", "caption": "home contrast", "findingIds": [ "F02" ] }, { "type": "other", "path": "evidence/home-cookies.json", "caption": "home cookies", "findingIds": [ "F29" ] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "home dark", "findingIds": [ "F01", "F07" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop", "findingIds": [ "F08", "F31", "F38", "F39" ] }, { "type": "screenshot", "path": "evidence/home-discoverability-crawler.png", "caption": "home discoverability crawler", "findingIds": [ "F33" ] }, { "type": "screenshot", "path": "evidence/home-discoverability-rendered.png", "caption": "home discoverability rendered", "findingIds": [] }, { "type": "discoverability", "path": "evidence/home-discoverability.json", "caption": "home discoverability", "findingIds": [ "F33" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom", "findingIds": [ "F01", "F05" ] }, { "type": "other", "path": "evidence/home-headers.json", "caption": "home headers", "findingIds": [ "F29", "F32" ] }, { "type": "other", "path": "evidence/home-images.json", "caption": "home images", "findingIds": [ "F25", "F40" ] }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "home mobile layout", "findingIds": [ "F15", "F16", "F25" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile", "findingIds": [ "F04", "F06", "F08", "F09", "F10", "F11", "F22", "F34" ] }, { "type": "other", "path": "evidence/home-probe.json", "caption": "home probe", "findingIds": [ "F02", "F03", "F04", "F07", "F09", "F11", "F12", "F19", "F21", "F23", "F27", "F35", "F37" ] }, { "type": "other", "path": "evidence/home-reduced-motion.json", "caption": "home reduced motion", "findingIds": [] }, { "type": "other", "path": "evidence/home-secrets.json", "caption": "home secrets", "findingIds": [] }, { "type": "other", "path": "evidence/home-summary.json", "caption": "home summary", "findingIds": [ "F17", "F18", "F30", "F41", "F42" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary", "findingIds": [ "F15" ] }, { "type": "other", "path": "evidence/home-trackers.json", "caption": "home trackers", "findingIds": [ "F30", "F38", "F42" ] }, { "type": "layout", "path": "evidence/home-zoom-layout.json", "caption": "home zoom layout", "findingIds": [] }, { "type": "har", "path": "evidence/home.har", "caption": "home", "findingIds": [ "F17" ] }, { "type": "other", "path": "evidence/http-headers.txt", "caption": "http headers", "findingIds": [] }, { "type": "lighthouse", "path": "evidence/lighthouse-home.json", "caption": "lighthouse home", "findingIds": [ "F15", "F16", "F17", "F18", "F19", "F20", "F22", "F23", "F24", "F26", "F41" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-media.json", "caption": "lighthouse media", "findingIds": [ "F16", "F20", "F21", "F24" ] }, { "type": "other", "path": "evidence/login-probe.json", "caption": "login probe", "findingIds": [ "F06", "F31", "F39" ] }, { "type": "screenshot", "path": "evidence/media-desktop.png", "caption": "media desktop", "findingIds": [ "F28", "F37" ] }, { "type": "screenshot", "path": "evidence/media-discoverability-crawler.png", "caption": "media discoverability crawler", "findingIds": [] }, { "type": "screenshot", "path": "evidence/media-discoverability-rendered.png", "caption": "media discoverability rendered", "findingIds": [] }, { "type": "discoverability", "path": "evidence/media-discoverability.json", "caption": "media discoverability", "findingIds": [ "F33" ] }, { "type": "dom", "path": "evidence/media-dom.json", "caption": "media dom", "findingIds": [] }, { "type": "other", "path": "evidence/media-metadata-probe.json", "caption": "media metadata probe", "findingIds": [ "F28", "F37" ] }, { "type": "layout", "path": "evidence/media-mobile-layout.json", "caption": "media mobile layout", "findingIds": [] }, { "type": "other", "path": "evidence/ogv-media-0.xml", "caption": "ogv media 0", "findingIds": [] }, { "type": "other", "path": "evidence/ogv-play-0.xml", "caption": "ogv play 0", "findingIds": [] }, { "type": "screenshot", "path": "evidence/play-desktop.png", "caption": "play desktop", "findingIds": [ "F10", "F13", "F14", "F36" ] }, { "type": "other", "path": "evidence/robots.txt", "caption": "robots", "findingIds": [ "F27", "F36" ] }, { "type": "other", "path": "evidence/sitemap.xml", "caption": "sitemap", "findingIds": [] }, { "type": "other", "path": "evidence/ugc-play-0.xml", "caption": "ugc play 0", "findingIds": [] }, { "type": "screenshot", "path": "evidence/video-desktop.png", "caption": "video desktop", "findingIds": [] } ], "config": { "loaded": false }, "coverage": { "catalogVersion": "modern-web-guidance@0.0.172", "catalogChecksum": "sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7", "expected": 58, "recorded": 58, "judged": 58, "blocked": 0, "notRun": 0, "missing": 0, "unknown": 0, "duplicates": 0, "complete": true }, "checkOutcomes": [ { "principleId": "respect-user-preferences", "checkId": "respects-color-scheme", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The light surface remains white under prefers-color-scheme: dark; DOM reports color-scheme: normal and the CSS probe found no prefers-color-scheme rules.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-dark.png", "evidence/home-dom.json" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Under prefers-reduced-motion: reduce the active-animation probe reported zero animations; the normal probe also found no running animations on the sampled landing state.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The prefers-contrast: more capture is visually unchanged from the default, and the CSS probe found no site-level contrast adaptation.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-contrast.png", "evidence/home-probe.json" ], "findingIds": [ "F02" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The CSS probe found no view-transition declarations; route and state changes use abrupt custom panels.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json" ], "findingIds": [ "F03" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "not-applicable", "confidence": "high", "method": "Recon and representative-path applicability judgement", "evidence": "No scroll-linked animation, parallax, scrollytelling, or reveal behavior was observed on the representative pages, so there is no scroll-driven effect to implement.", "reason": "No scroll-linked animation, parallax, scrollytelling, or reveal behavior was observed on the representative pages, so there is no scroll-driven effect to implement." }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The CSS probe found no scroll-snap, overscroll, or declarative gesture treatment, while the long card feed is touch-centric.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ], "findingIds": [ "F04" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The fixed header remains static while scrolling a page over 7,000 CSS pixels tall; DOM/CSS evidence found no scroll-state query or progress cue.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-dom.json" ], "findingIds": [ "F05" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The sign-in panel is a custom overlay with no dialog/popover or anchor-positioning primitive; on mobile it is clipped beyond the right edge.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-mobile.png", "evidence/login-probe.json" ], "findingIds": [ "F06" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The open sign-in panel covers content without focus treatment or a directional transition, and the probe found no view-transition or highlight support.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-dark.png", "evidence/home-probe.json" ], "findingIds": [ "F07" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "On desktop the cookie banner consumes about one-third of the viewport; on mobile it covers the lower portion while the sign-in panel simultaneously obscures the content.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ], "findingIds": [ "F08" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The probe found zero dialog, popover, and details elements even though a sign-in overlay and cookie consent surface are visible.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ], "findingIds": [ "F09" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The cookie banner and sign-in panel dominate the first viewport and obscure the media experience.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-mobile.png", "evidence/play-desktop.png" ], "findingIds": [ "F10" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Layout probes at 360x800 and 320x640 reported zero horizontal overflow and a viewport meta tag; media detail also stayed within 360 CSS pixels.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The CSS probe found no container queries despite reusable card, header, and account-panel components appearing at desktop and mobile sizes.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ], "findingIds": [ "F11" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "80 of 201 visible controls measured below 24px in at least one dimension; sampled controls had no visible computed outline, including unnamed 24px buttons.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json" ], "findingIds": [ "F12" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The landing page identifies Anime and Recommended for You, while the media page clearly names the title and exposes its details in the first viewport.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The sitemap-listed play page for /play/34450 dead-ends with a rights-holder availability message; the account panel and consent banner obscure the recovery action.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/play-desktop.png" ], "findingIds": [ "F13" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The play page shows an availability error, but overlapping account and cookie UI hides context and makes the single recovery action hard to understand.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/play-desktop.png" ], "findingIds": [ "F14" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Lighthouse measured landing-page LCP 14.4s and CLS 0.737; the direct trace measured LCP 3.98s and mobile layout measured CLS 0.496, all outside good thresholds.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-trace-summary.json", "evidence/home-mobile-layout.json" ], "findingIds": [ "F15" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The mobile layout observer recorded CLS 0.496 from shifts near 3s; Lighthouse measured CLS 0.737 on home and 0.913 on media.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-mobile-layout.json", "evidence/lighthouse-home.json", "evidence/lighthouse-media.json" ], "findingIds": [ "F16" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The trace summary recorded zero long tasks and 0ms total blocking time; Lighthouse TBT was 150ms on home and 80ms on media, within the good range.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "HAR captured 142 requests and 2.73MB transferred, including 21 stylesheets and multiple VeryHigh-priority parser-inserted CSS files; LCP reached 14.4s under Lighthouse throttling.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-summary.json", "evidence/home.har", "evidence/lighthouse-home.json" ], "findingIds": [ "F17" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Lighthouse estimated 710KiB unused JavaScript and 189KiB unused CSS; HAR showed 69 script requests and 21 stylesheet requests.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-summary.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Lighthouse failed button-name and link-name; the probe found 6 unnamed controls, including the menu button and logo/header links.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-probe.json" ], "findingIds": [ "F19" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Lighthouse failed color-contrast on both home and media pages.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-media.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The landing page has no h1 and starts with h3 headings; Lighthouse found heading-order failure on media, and sampled controls computed to outline:none.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json", "evidence/lighthouse-media.json" ], "findingIds": [ "F21" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The mobile cookie copy is dense and the account panel is clipped; muted metadata text also failed the Lighthouse contrast audit.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-mobile.png", "evidence/lighthouse-home.json" ], "findingIds": [ "F22" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The viewport disables scaling with user-scalable=no and maximum-scale=1; 80 controls are below 24px in one dimension.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json", "evidence/lighthouse-home.json" ], "findingIds": [ "F23" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Lighthouse reported a console error: “Not signed in with the identity provider.” on both sampled templates.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-media.json" ], "findingIds": [ "F24" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Although doctype and UTF-8 are valid, all 92 inspected images lacked width/height attributes and 49 lacked srcset.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-images.json", "evidence/home-mobile-layout.json" ], "findingIds": [ "F25" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Lighthouse reported a BFCache failure and normal anonymous identity state generated a console error; inspector issues otherwise passed.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/lighthouse-home.json" ], "findingIds": [ "F26" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Home and media probes found descriptive titles and meta descriptions; the detail title is unique to “My Roommate is a Cat”.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The probe found 2 anchors without href and 2 links without discernible text; robots.txt returned the app 404 shell rather than crawler directives.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json", "evidence/robots.txt" ], "findingIds": [ "F27" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Home and media pages expose canonical URLs and five hreflang variants; sitemap.xml returns a populated sitemap index and sampled pages return HTTP 200.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The media page exposes Organization and BreadcrumbList JSON-LD but no VideoObject/TVSeries entity; its Open Graph image is the generic site share cover rather than the visible title art.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/media-metadata-probe.json", "evidence/media-desktop.png" ], "findingIds": [ "F28" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "HTTPS is used, but the headers primitive found no CSP, HSTS, nosniff, frame protection, Referrer-Policy, or Permissions-Policy; all four cookies lacked Secure and used SameSite=None.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "findingIds": [ "F29" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The page contacted 11 third-party origins and Facebook tracking before consent; 135 of 142 HAR requests and 2.49MB were classified third-party.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-trackers.json", "evidence/home-summary.json" ], "findingIds": [ "F30" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The visible sign-in experience offers social/account entry but the site probe found no dialog/form or evidence of a passkey/WebAuthn flow; only platform WebAuthn availability was present.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/login-probe.json", "evidence/home-desktop.png" ], "findingIds": [ "F31" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "No HSTS, clickjacking protection, CSP frame-ancestors, Referrer-Policy, or Permissions-Policy was present.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-headers.json" ], "findingIds": [ "F32" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Discoverability found the home page to be a JS shell with only 1% raw/rendered word coverage, while the media detail retained 75% without JS.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-discoverability.json", "evidence/home-discoverability-crawler.png", "evidence/media-discoverability.json" ], "findingIds": [ "F33" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The custom sign-in panel is clipped off the right side at 360px and overlaps consent/content rather than repositioning robustly.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-mobile.png" ], "findingIds": [ "F34" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The probe found no web app manifest URL; no installed/offline surface was exposed for this app-like video service.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-probe.json" ], "findingIds": [ "F35" ] }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The sitemap-listed play route shows a rights/availability failure, but overlapping panels obscure recovery; /robots.txt renders an app-style 404 document instead of a protocol response.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/play-desktop.png", "evidence/robots.txt" ], "findingIds": [ "F36" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The document declares lang=en and exposes five hreflang variants; the visible mixed English/Japanese title metadata remains readable.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The localized media surface renders “Jan 8, 2019” as plain text with no time element, while the CSS probe found no logical properties.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/media-desktop.png", "evidence/media-metadata-probe.json", "evidence/home-probe.json" ], "findingIds": [ "F37" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Recon and representative-path applicability judgement", "evidence": "No events, schedules with times, user-entered times, or cross-time-zone coordination flow was present in the sampled home, media, and playback templates.", "reason": "No events, schedules with times, user-entered times, or cross-time-zone coordination flow was present in the sampled home, media, and playback templates." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The cookie surface offers only “Got it” with no equally prominent reject/manage choice, while Facebook tracking requests already occur before consent.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-trackers.json" ], "findingIds": [ "F38" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "not-applicable", "confidence": "high", "method": "Recon and representative-path applicability judgement", "evidence": "No user-editable form or invalid-input flow was present in the sampled anonymous pages; the sign-in panel exposed no form fields to exercise.", "reason": "No user-editable form or invalid-input flow was present in the sampled anonymous pages; the sign-in panel exposed no form fields to exercise." }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "not-applicable", "confidence": "high", "method": "Recon and representative-path applicability judgement", "evidence": "No address, payment, sign-in, sign-up, or other editable input was exposed in the sampled anonymous experience.", "reason": "No address, payment, sign-in, sign-up, or other editable input was exposed in the sampled anonymous experience." }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Premium and Sign In are prominent, but the sampled sign-in panel has no semantic dialog/form and consent provides no reject/manage route.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-desktop.png", "evidence/login-probe.json" ], "findingIds": [ "F39" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Of 92 images, all lacked intrinsic dimensions and 49 lacked srcset; the feed commonly serves 720px JPEGs into 366px slots.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-images.json" ], "findingIds": [ "F40" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The landing page transfers 69 scripts and Lighthouse estimates 710KiB unused JavaScript, including player code before a video is selected.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-home.json" ], "findingIds": [ "F41" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "Third-party resources account for 135 requests and 2.49MB; Google identity and Facebook SDKs load on the anonymous landing page.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/home-summary.json", "evidence/home-trackers.json" ], "findingIds": [ "F42" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "not-applicable", "confidence": "high", "method": "Recon and representative-path applicability judgement", "evidence": "No declared agent-facing transactional capability or intent was present; this emerging WebMCP opportunity is outside the sampled public media-browsing scope.", "reason": "No declared agent-facing transactional capability or intent was present; this emerging WebMCP opportunity is outside the sampled public media-browsing scope." }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Recon and representative-path applicability judgement", "evidence": "No user task in the sampled browsing and playback flow requires on-device inference; absence is not a quality failure for this run.", "reason": "No user task in the sampled browsing and playback flow requires on-device inference; absence is not a quality failure for this run." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "After ten repeated open/dismiss interactions, heap totals decreased from 460,279 nodes / 32.55MB to 450,977 nodes / 32.05MB, showing no retained-growth signal in this isolated comparison.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "issues", "confidence": "medium", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The anonymous landing state retained about 460,279 heap nodes and 32.55MB self size before interaction, a large baseline for a feed whose first viewport is mostly cards and chrome.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ], "artifacts": [ "evidence/heap-summary.json" ], "findingIds": [ "F43" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "low", "method": "Screenshots, DOM/evaluate probes, and objective evidence artifacts mapped to this check", "evidence": "The post-interaction snapshot had fewer total nodes and bytes than baseline after ten panel cycles; no aggregate accumulation signal was observed, though constructor-level detached-node proof was unavailable.", "pathIds": [ "home", "media-detail", "playback", "ugc-video" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01", "F02" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F03", "F04" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "issues", "findingIds": [ "F05", "F06", "F07" ] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F08", "F09", "F10" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F11", "F12" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F13", "F14" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F15", "F16", "F17", "F18" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F19", "F20", "F21", "F22", "F23" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F24", "F25", "F26" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F27", "F28" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F29", "F30", "F31", "F32" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F33", "F34", "F35", "F36" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "issues", "findingIds": [ "F37" ] }, { "principleId": "be-trustworthy", "expectation": "default", "status": "issues", "findingIds": [ "F38", "F39" ] }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F40", "F41", "F42" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "reason": "No declared agent-facing transactional capability or intent was present; this emerging WebMCP opportunity is outside the sampled public media-browsing scope. No user task in the sampled browsing and playback flow requires on-device inference; absence is not a quality failure for this run." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F43" ] } ], "paths": [ { "id": "home", "description": "Landing/feed template and global navigation; tested desktop, mobile, dark, contrast, reduced motion, network, performance, security, crawler and memory conditions.", "url": "https://www.bilibili.tv", "conditions": [ "desktop", "360x800", "320x640", "prefers-color-scheme: dark", "prefers-contrast: more", "prefers-reduced-motion: reduce", "JavaScript disabled crawler" ], "result": "issues" }, { "id": "media-detail", "description": "Representative OGV title detail from the published sitemap; covers entity content, metadata, localized detail layout, and no-JS rendering.", "url": "https://www.bilibili.tv/media/34450", "conditions": [ "desktop", "360x800", "JavaScript disabled crawler" ], "result": "issues" }, { "id": "playback", "description": "Representative OGV playback route from the sitemap; covers region/rights failure and recovery state.", "url": "https://www.bilibili.tv/play/34450", "conditions": [ "desktop anonymous" ], "result": "issues" }, { "id": "ugc-video", "description": "Representative user-generated video route from the sitemap; covers player-first content and muted autoplay surface.", "url": "https://www.bilibili.tv/video/4788735937747456", "conditions": [ "desktop anonymous" ], "result": "issues" } ], "findings": [ { "id": "F01", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The light surface remains white under prefers-color-scheme: dark", "evidence": "The light surface remains white under prefers-color-scheme: dark; DOM reports color-scheme: normal and the CSS probe found no prefers-color-scheme rules.", "artifacts": [ "evidence/home-dark.png", "evidence/home-dom.json" ], "suggestedFix": "Add color-scheme: light dark and theme surfaces with prefers-color-scheme or light-dark().", "effort": "medium" }, { "id": "F02", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "respect-user-preferences", "principleCheckId": "respects-contrast", "guidanceId": "adapt-scrollbar-to-contrast-preferences", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The prefers-contrast: more capture is visually unchanged from the default, and the CSS probe found no site-level contrast adaptation.", "evidence": "The prefers-contrast: more capture is visually unchanged from the default, and the CSS probe found no site-level contrast adaptation.", "artifacts": [ "evidence/home-contrast.png", "evidence/home-probe.json" ], "suggestedFix": "Add forced-colors and prefers-contrast adjustments for essential controls and muted text.", "effort": "small" }, { "id": "F03", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "same-document-transitions", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The CSS probe found no view-transition declarations", "evidence": "The CSS probe found no view-transition declarations; route and state changes use abrupt custom panels.", "artifacts": [ "evidence/home-probe.json" ], "suggestedFix": "Use same-document and cross-document View Transitions for menu, sign-in, and route changes, with reduced-motion handling.", "effort": "small" }, { "id": "F04", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "implement-natural-interactions", "principleCheckId": "physical-gestures", "guidanceId": "carousel-slide-effects", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The CSS probe found no scroll-snap, overscroll, or declarative gesture treatment, while the long card feed is touch-centric.", "evidence": "The CSS probe found no scroll-snap, overscroll, or declarative gesture treatment, while the long card feed is touch-centric.", "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ], "suggestedFix": "Use native scrolling, overscroll behavior, and scroll snap where carousels or gesture navigation require it instead of custom pointer handling.", "effort": "small" }, { "id": "F05", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "provide-guided-navigation", "principleCheckId": "scroll-state-aware-chrome", "guidanceId": "shrinking-header-on-scroll", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The fixed header remains static while scrolling a page over 7,000 CSS pixels tall", "evidence": "The fixed header remains static while scrolling a page over 7,000 CSS pixels tall; DOM/CSS evidence found no scroll-state query or progress cue.", "artifacts": [ "evidence/home-dom.json" ], "suggestedFix": "Make the fixed chrome respond to scroll state and add a lightweight progress or shrinking-header treatment.", "effort": "small" }, { "id": "F06", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "provide-guided-navigation", "principleCheckId": "anchored-positioning", "guidanceId": "position-aware-tooltips", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The sign-in panel is a custom overlay with no dialog/popover or anchor-positioning primitive", "evidence": "The sign-in panel is a custom overlay with no dialog/popover or anchor-positioning primitive; on mobile it is clipped beyond the right edge.", "artifacts": [ "evidence/home-mobile.png", "evidence/login-probe.json" ], "suggestedFix": "Use popover plus CSS anchor positioning and fallback positions for the sign-in panel.", "effort": "medium" }, { "id": "F07", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "provide-guided-navigation", "principleCheckId": "directs-attention", "guidanceId": "directional-navigation-transitions", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The open sign-in panel covers content without focus treatment or a directional transition, and the probe found no view-transition or highlight support.", "evidence": "The open sign-in panel covers content without focus treatment or a directional transition, and the probe found no view-transition or highlight support.", "artifacts": [ "evidence/home-dark.png", "evidence/home-probe.json" ], "suggestedFix": "Guide attention with managed focus and a directional transition when opening navigation or account panels.", "effort": "small" }, { "id": "F08", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "On desktop the cookie banner consumes about one-third of the viewport", "evidence": "On desktop the cookie banner consumes about one-third of the viewport; on mobile it covers the lower portion while the sign-in panel simultaneously obscures the content.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ], "suggestedFix": "Replace the oversized load-time banner with a compact, accessible consent surface that does not obscure core content.", "effort": "medium" }, { "id": "F09", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The probe found zero dialog, popover, and details elements even though a sign-in overlay and cookie consent surface are visible.", "evidence": "The probe found zero dialog, popover, and details elements even though a sign-in overlay and cookie consent surface are visible.", "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ], "suggestedFix": "Use dialog for modal consent and popover for transient account UI, with declarative dismiss and focus behavior.", "effort": "medium" }, { "id": "F10", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "maximize-content-reduce-noise", "principleCheckId": "reduced-chrome", "guidanceId": "interactive-content-reveal", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The cookie banner and sign-in panel dominate the first viewport and obscure the media experience.", "evidence": "The cookie banner and sign-in panel dominate the first viewport and obscure the media experience.", "artifacts": [ "evidence/home-mobile.png", "evidence/play-desktop.png" ], "suggestedFix": "Reduce persistent chrome and defer account promotion until user intent is expressed.", "effort": "small" }, { "id": "F11", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The CSS probe found no container queries despite reusable card, header, and account-panel components appearing at desktop and mobile sizes.", "evidence": "The CSS probe found no container queries despite reusable card, header, and account-panel components appearing at desktop and mobile sizes.", "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ], "suggestedFix": "Add container-type to reusable card/panel regions and adapt them with size-aware container queries.", "effort": "small" }, { "id": "F12", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "80 of 201 visible controls measured below 24px in at least one dimension", "evidence": "80 of 201 visible controls measured below 24px in at least one dimension; sampled controls had no visible computed outline, including unnamed 24px buttons.", "artifacts": [ "evidence/home-probe.json" ], "suggestedFix": "Increase targets to at least 44 CSS pixels where practical and provide clear :focus-visible styles and non-hover fallbacks.", "effort": "medium" }, { "id": "F13", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "support-core-task-success", "principleCheckId": "primary-flow-completion", "guidanceId": "persistent-toast-notifications", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The sitemap-listed play page for /play/34450 dead-ends with a rights-holder availability message", "evidence": "The sitemap-listed play page for /play/34450 dead-ends with a rights-holder availability message; the account panel and consent banner obscure the recovery action.", "artifacts": [ "evidence/play-desktop.png" ], "suggestedFix": "Keep unavailable-title recovery visible and offer clear alternative episodes or region-available recommendations without overlapping overlays.", "effort": "small" }, { "id": "F14", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "support-core-task-success", "principleCheckId": "clear-system-state-and-recovery", "guidanceId": "persistent-toast-notifications", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The play page shows an availability error, but overlapping account and cookie UI hides context and makes the single recovery action hard to understand.", "evidence": "The play page shows an availability error, but overlapping account and cookie UI hides context and makes the single recovery action hard to understand.", "artifacts": [ "evidence/play-desktop.png" ], "suggestedFix": "Present an explicit, unobscured error state with retry, back, and alternative-content actions.", "effort": "small" }, { "id": "F15", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Lighthouse measured landing-page LCP 14.4s and CLS 0.737", "evidence": "Lighthouse measured landing-page LCP 14.4s and CLS 0.737; the direct trace measured LCP 3.98s and mobile layout measured CLS 0.496, all outside good thresholds.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-trace-summary.json", "evidence/home-mobile-layout.json" ], "suggestedFix": "Prioritize the LCP candidate, reserve dynamic content space, and defer non-critical work.", "effort": "medium" }, { "id": "F16", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-fast-and-stable", "principleCheckId": "visual-stability", "guidanceId": "visually-stable-font-fallbacks", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The mobile layout observer recorded CLS 0.496 from shifts near 3s", "evidence": "The mobile layout observer recorded CLS 0.496 from shifts near 3s; Lighthouse measured CLS 0.737 on home and 0.913 on media.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/lighthouse-home.json", "evidence/lighthouse-media.json" ], "suggestedFix": "Reserve dimensions for cards, images, account UI, and consent content before late data arrives.", "effort": "medium" }, { "id": "F17", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-preload-priority", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "HAR captured 142 requests and 2.73MB transferred, including 21 stylesheets and multiple VeryHigh-priority parser-inserted CSS files", "evidence": "HAR captured 142 requests and 2.73MB transferred, including 21 stylesheets and multiple VeryHigh-priority parser-inserted CSS files; LCP reached 14.4s under Lighthouse throttling.", "artifacts": [ "evidence/home-summary.json", "evidence/home.har", "evidence/lighthouse-home.json" ], "suggestedFix": "Consolidate critical CSS, defer non-critical styles/scripts, and prioritize only the actual LCP resource.", "effort": "medium" }, { "id": "F18", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Lighthouse estimated 710KiB unused JavaScript and 189KiB unused CSS", "evidence": "Lighthouse estimated 710KiB unused JavaScript and 189KiB unused CSS; HAR showed 69 script requests and 21 stylesheet requests.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-summary.json" ], "suggestedFix": "Code-split player/account features and remove or conditionally load unused JS and CSS.", "effort": "medium" }, { "id": "F19", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Lighthouse failed button-name and link-name", "evidence": "Lighthouse failed button-name and link-name; the probe found 6 unnamed controls, including the menu button and logo/header links.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-probe.json" ], "suggestedFix": "Give icon controls accessible names and preserve semantic roles for all interactive elements.", "effort": "medium" }, { "id": "F20", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Lighthouse failed color-contrast on both home and media pages.", "evidence": "Lighthouse failed color-contrast on both home and media pages.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-media.json" ], "suggestedFix": "Adjust muted text and control colors to meet WCAG contrast ratios in every state.", "effort": "medium" }, { "id": "F21", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The landing page has no h1 and starts with h3 headings", "evidence": "The landing page has no h1 and starts with h3 headings; Lighthouse found heading-order failure on media, and sampled controls computed to outline:none.", "artifacts": [ "evidence/home-probe.json", "evidence/lighthouse-media.json" ], "suggestedFix": "Add a logical h1-h2 hierarchy, landmarks, and strong :focus-visible indicators in DOM order.", "effort": "medium" }, { "id": "F22", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-inclusive", "principleCheckId": "legible-text", "guidanceId": "improve-text-layout-and-legibility", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The mobile cookie copy is dense and the account panel is clipped", "evidence": "The mobile cookie copy is dense and the account panel is clipped; muted metadata text also failed the Lighthouse contrast audit.", "artifacts": [ "evidence/home-mobile.png", "evidence/lighthouse-home.json" ], "suggestedFix": "Use responsive readable line lengths, unclipped panel layouts, and higher-contrast metadata text.", "effort": "small" }, { "id": "F23", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "fluid-scaling", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The viewport disables scaling with user-scalable=no and maximum-scale=1", "evidence": "The viewport disables scaling with user-scalable=no and maximum-scale=1; 80 controls are below 24px in one dimension.", "artifacts": [ "evidence/home-probe.json", "evidence/lighthouse-home.json" ], "suggestedFix": "Remove user-scalable=no/maximum-scale restrictions and enlarge targets while preserving narrow-screen reflow.", "effort": "medium" }, { "id": "F24", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "Lighthouse reported a console error: “Not signed in with the identity provider.” on both sampled templates.", "evidence": "Lighthouse reported a console error: “Not signed in with the identity provider.” on both sampled templates.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-media.json" ], "suggestedFix": "Handle identity-provider state without logging an error during normal anonymous browsing.", "effort": "small" }, { "id": "F25", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Although doctype and UTF-8 are valid, all 92 inspected images lacked width/height attributes and 49 lacked srcset.", "evidence": "Although doctype and UTF-8 are valid, all 92 inspected images lacked width/height attributes and 49 lacked srcset.", "artifacts": [ "evidence/home-images.json", "evidence/home-mobile-layout.json" ], "suggestedFix": "Emit intrinsic width and height or aspect-ratio for images and responsive srcset/sizes.", "effort": "medium" }, { "id": "F26", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "Lighthouse reported a BFCache failure and normal anonymous identity state generated a console error", "evidence": "Lighthouse reported a BFCache failure and normal anonymous identity state generated a console error; inspector issues otherwise passed.", "artifacts": [ "evidence/lighthouse-home.json" ], "suggestedFix": "Remove avoidable BFCache blockers and keep authentication SDK behavior quiet until requested.", "effort": "small" }, { "id": "F27", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-discoverable", "principleCheckId": "crawlable-and-mobile-friendly", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The probe found 2 anchors without href and 2 links without discernible text", "evidence": "The probe found 2 anchors without href and 2 links without discernible text; robots.txt returned the app 404 shell rather than crawler directives.", "artifacts": [ "evidence/home-probe.json", "evidence/robots.txt" ], "suggestedFix": "Use real href values and descriptive names for links, and serve a valid text/plain robots.txt.", "effort": "small" }, { "id": "F28", "pathId": "media-detail", "url": "https://www.bilibili.tv/media/34450", "principleId": "be-discoverable", "principleCheckId": "structured-and-shareable-metadata", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The media page exposes Organization and BreadcrumbList JSON-LD but no VideoObject/TVSeries entity", "evidence": "The media page exposes Organization and BreadcrumbList JSON-LD but no VideoObject/TVSeries entity; its Open Graph image is the generic site share cover rather than the visible title art.", "artifacts": [ "evidence/media-metadata-probe.json", "evidence/media-desktop.png" ], "suggestedFix": "Add content-specific schema.org entity markup and an accurate title-specific social image.", "effort": "small" }, { "id": "F29", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "severity": "critical", "confidence": "high", "summary": "HTTPS is used, but the headers primitive found no CSP, HSTS, nosniff, frame protection, Referrer-Policy, or Permissions-Policy", "evidence": "HTTPS is used, but the headers primitive found no CSP, HSTS, nosniff, frame protection, Referrer-Policy, or Permissions-Policy; all four cookies lacked Secure and used SameSite=None.", "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "suggestedFix": "Add HSTS, CSP, nosniff, framing protection, Referrer-Policy and Permissions-Policy; set Secure and appropriate SameSite cookies.", "effort": "medium" }, { "id": "F30", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The page contacted 11 third-party origins and Facebook tracking before consent", "evidence": "The page contacted 11 third-party origins and Facebook tracking before consent; 135 of 142 HAR requests and 2.49MB were classified third-party.", "artifacts": [ "evidence/home-trackers.json", "evidence/home-summary.json" ], "suggestedFix": "Block non-essential analytics and identity SDKs until consent, minimize events, and reduce third-party dependencies.", "effort": "medium" }, { "id": "F31", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-private-and-secure", "principleCheckId": "in-context-permissions-and-modern-auth", "guidanceId": "passkeys", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The visible sign-in experience offers social/account entry but the site probe found no dialog/form or evidence of a passkey/WebAuthn flow", "evidence": "The visible sign-in experience offers social/account entry but the site probe found no dialog/form or evidence of a passkey/WebAuthn flow; only platform WebAuthn availability was present.", "artifacts": [ "evidence/login-probe.json", "evidence/home-desktop.png" ], "suggestedFix": "Offer passkey sign-in/registration and invoke credential or permission prompts only after explicit user action.", "effort": "small" }, { "id": "F32", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "severity": "critical", "confidence": "high", "summary": "No HSTS, clickjacking protection, CSP frame-ancestors, Referrer-Policy, or Permissions-Policy was present.", "evidence": "No HSTS, clickjacking protection, CSP frame-ancestors, Referrer-Policy, or Permissions-Policy was present.", "artifacts": [ "evidence/home-headers.json" ], "suggestedFix": "Configure browser-enforced defense headers, using CSP frame-ancestors and a restrictive Permissions-Policy.", "effort": "medium" }, { "id": "F33", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-resilient", "principleCheckId": "progressive-enhancement", "guidanceId": "stabilize-reactive-state", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Discoverability found the home page to be a JS shell with only 1% raw/rendered word coverage, while the media detail retained 75% without JS.", "evidence": "Discoverability found the home page to be a JS shell with only 1% raw/rendered word coverage, while the media detail retained 75% without JS.", "artifacts": [ "evidence/home-discoverability.json", "evidence/home-discoverability-crawler.png", "evidence/media-discoverability.json" ], "suggestedFix": "Server-render the landing feed and navigation so core discovery remains useful without JavaScript.", "effort": "medium" }, { "id": "F34", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-resilient", "principleCheckId": "resilient-runtime-behaviour", "guidanceId": "resilient-context-menus-and-nested-dropdowns", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The custom sign-in panel is clipped off the right side at 360px and overlaps consent/content rather than repositioning robustly.", "evidence": "The custom sign-in panel is clipped off the right side at 360px and overlaps consent/content rather than repositioning robustly.", "artifacts": [ "evidence/home-mobile.png" ], "suggestedFix": "Use resilient popover positioning with fallback placements and viewport-aware sizing.", "effort": "medium" }, { "id": "F35", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-resilient", "principleCheckId": "offline-and-installable", "guidanceId": "detect-initial-visibility-state", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The probe found no web app manifest URL", "evidence": "The probe found no web app manifest URL; no installed/offline surface was exposed for this app-like video service.", "artifacts": [ "evidence/home-probe.json" ], "suggestedFix": "Provide a manifest and a service-worker offline shell with useful cached navigation and failure fallback.", "effort": "small" }, { "id": "F36", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-resilient", "principleCheckId": "network-and-http-failure-states", "guidanceId": "persistent-toast-notifications", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The sitemap-listed play route shows a rights/availability failure, but overlapping panels obscure recovery", "evidence": "The sitemap-listed play route shows a rights/availability failure, but overlapping panels obscure recovery; /robots.txt renders an app-style 404 document instead of a protocol response.", "artifacts": [ "evidence/play-desktop.png", "evidence/robots.txt" ], "suggestedFix": "Create unobscured, route-appropriate error states with retry/back/alternatives and correct HTTP/protocol responses.", "effort": "small" }, { "id": "F37", "pathId": "media-detail", "url": "https://www.bilibili.tv/media/34450", "principleId": "be-internationalised", "principleCheckId": "locale-aware-data", "guidanceId": "support-global-calendar-systems", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The localized media surface renders “Jan 8, 2019” as plain text with no time element, while the CSS probe found no logical properties.", "evidence": "The localized media surface renders “Jan 8, 2019” as plain text with no time element, while the CSS probe found no logical properties.", "artifacts": [ "evidence/media-desktop.png", "evidence/media-metadata-probe.json", "evidence/home-probe.json" ], "suggestedFix": "Format locale-sensitive dates with Intl.DateTimeFormat and use logical CSS properties across language variants.", "effort": "small" }, { "id": "F38", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-trustworthy", "principleCheckId": "no-dark-patterns", "guidanceId": "custom-button-actions", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The cookie surface offers only “Got it” with no equally prominent reject/manage choice, while Facebook tracking requests already occur before consent.", "evidence": "The cookie surface offers only “Got it” with no equally prominent reject/manage choice, while Facebook tracking requests already occur before consent.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-trackers.json" ], "suggestedFix": "Present equally clear accept, reject, and manage choices and defer optional tracking until consent.", "effort": "medium" }, { "id": "F39", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-trustworthy", "principleCheckId": "safe-commercial-and-account-flows", "guidanceId": "passkey-management", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Premium and Sign In are prominent, but the sampled sign-in panel has no semantic dialog/form and consent provides no reject/manage route.", "evidence": "Premium and Sign In are prominent, but the sampled sign-in panel has no semantic dialog/form and consent provides no reject/manage route.", "artifacts": [ "evidence/home-desktop.png", "evidence/login-probe.json" ], "suggestedFix": "Make account and subscription commitments explicit, semantic, reversible, and compatible with passkeys/autofill.", "effort": "medium" }, { "id": "F40", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "optimize-image-priority", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Of 92 images, all lacked intrinsic dimensions and 49 lacked srcset", "evidence": "Of 92 images, all lacked intrinsic dimensions and 49 lacked srcset; the feed commonly serves 720px JPEGs into 366px slots.", "artifacts": [ "evidence/home-images.json" ], "suggestedFix": "Emit responsive srcset/sizes and intrinsic dimensions, retaining modern formats and right-sized variants.", "effort": "medium" }, { "id": "F41", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-sustainable", "principleCheckId": "no-wasteful-work", "guidanceId": "conditional-async-dependencies", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The landing page transfers 69 scripts and Lighthouse estimates 710KiB unused JavaScript, including player code before a video is selected.", "evidence": "The landing page transfers 69 scripts and Lighthouse estimates 710KiB unused JavaScript, including player code before a video is selected.", "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-home.json" ], "suggestedFix": "Conditionally load player, identity, and analytics code only when the user reaches the corresponding feature.", "effort": "medium" }, { "id": "F42", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "deprioritize-background-fetches", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Third-party resources account for 135 requests and 2.49MB", "evidence": "Third-party resources account for 135 requests and 2.49MB; Google identity and Facebook SDKs load on the anonymous landing page.", "artifacts": [ "evidence/home-summary.json", "evidence/home-trackers.json" ], "suggestedFix": "Set a third-party byte/request budget and defer identity, tracker, and media code until user intent.", "effort": "medium" }, { "id": "F43", "pathId": "home", "url": "https://www.bilibili.tv", "principleId": "be-memory-efficient", "principleCheckId": "bounded-footprint", "guidanceId": "performance", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The anonymous landing state retained about 460,279 heap nodes and 32.55MB self size before interaction, a large baseline for a feed whose first viewport is mostly cards and chrome.", "evidence": "The anonymous landing state retained about 460,279 heap nodes and 32.55MB self size before interaction, a large baseline for a feed whose first viewport is mostly cards and chrome.", "artifacts": [ "evidence/heap-summary.json" ], "suggestedFix": "Reduce eager framework/player/identity allocations and lazy-initialize offscreen feed and player features.", "effort": "small" } ], "taskList": [ { "id": "T01", "title": "Add HSTS, CSP, nosniff, framing protection, Referrer-Policy and Permissions-Policy; set Secure and appropriate SameSite cookies.", "priority": 1, "findingIds": [ "F29", "F30", "F31", "F32" ], "guidanceId": "security", "status": "open" }, { "id": "T02", "title": "Prioritize the LCP candidate, reserve dynamic content space, and defer non-critical work.", "priority": 2, "findingIds": [ "F15", "F16", "F17", "F18" ], "guidanceId": "performance", "status": "open" }, { "id": "T03", "title": "Give icon controls accessible names and preserve semantic roles for all interactive elements.", "priority": 3, "findingIds": [ "F19", "F20", "F21", "F22", "F23" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T04", "title": "Present equally clear accept, reject, and manage choices and defer optional tracking until consent.", "priority": 4, "findingIds": [ "F38", "F39" ], "guidanceId": "custom-button-actions", "status": "open" }, { "id": "T05", "title": "Server-render the landing feed and navigation so core discovery remains useful without JavaScript.", "priority": 5, "findingIds": [ "F33", "F34", "F35", "F36" ], "guidanceId": "stabilize-reactive-state", "status": "open" }, { "id": "T06", "title": "Replace the oversized load-time banner with a compact, accessible consent surface that does not obscure core content.", "priority": 6, "findingIds": [ "F08", "F09", "F10" ], "guidanceId": "light-dismiss-a-dialog", "status": "open" }, { "id": "T07", "title": "Emit responsive srcset/sizes and intrinsic dimensions, retaining modern formats and right-sized variants.", "priority": 7, "findingIds": [ "F40", "F41", "F42" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T08", "title": "Use real href values and descriptive names for links, and serve a valid text/plain robots.txt.", "priority": 8, "findingIds": [ "F27", "F28" ], "guidanceId": "html", "status": "open" }, { "id": "T09", "title": "Add container-type to reusable card/panel regions and adapt them with size-aware container queries.", "priority": 9, "findingIds": [ "F11", "F12" ], "guidanceId": "size-aware-styling", "status": "open" }, { "id": "T10", "title": "Reduce eager framework/player/identity allocations and lazy-initialize offscreen feed and player features.", "priority": 10, "findingIds": [ "F43" ], "guidanceId": "performance", "status": "open" } ], "budget": { "wallClockSeconds": 1200, "pathCount": 4, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-21T15-38-47-871Z" }