{ "url": "https://tw.yahoo.com", "auditedAt": "2026-07-20T21:40:00.926Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete audit of four anonymous public templates plus consent and 404 behavior. Excludes authenticated account/mail, search submission, article detail, checkout and destructive flows because credentials/transaction authority were unavailable.", "page": { "appType": "hybrid", "framework": "Mixed Yahoo portal plus React/Next-style News surfaces", "notes": "Dense Traditional Chinese portal. First visit requires consent; evidence continued after choosing Reject all." }, "evidenceUsed": [ "screenshot", "dom+computed-style", "evaluate-probe", "raw-CDP multi-page session", "Lighthouse", "raw HTTP", "runtime memory/DOM metrics", "secrets", "headers", "trackers", "Modern Web Guidance" ], "guidanceConsulted": [ "accessibility", "accessible-error-announcement", "language-detection", "language-model", "summarizer", "translator", "css", "highlight-text-ranges", "css-layout", "animated-select-picker", "autofill-address-form", "autofill-highlight-inputs", "autofill-payment-form", "autofill-sign-in-form", "autofill-sign-up-form", "brand-consistent-forms", "branded-select-styling", "custom-select-picker-layouts", "form-fields-automatically-fit-contents", "forms", "required-field-feedback", "rich-media-picker", "select-menu-interaction", "validate-input-after-interaction", "html", "passkey-authentication", "passkey-conditional-create", "passkey-management", "passkey-reauthentication", "passkey-registration", "passkeys", "batch-analytics-events", "break-up-long-tasks", "calculate-total-foreground-time", "conditional-async-dependencies", "defer-rendering-heavy-content", "defer-work-until-scroll-ends", "deprioritize-background-fetches", "detect-initial-visibility-state", "efficient-background-processing", "faster-spa-view-transitions", "full-session-analytics", "identify-heavy-scripts", "identify-inp-causes", "improve-next-page-load-performance", "interactions-in-complex-layouts", "optimize-image-priority", "optimize-preload-priority", "optimize-script-priority", "performance", "resolution-optimized-pseudo-elements", "schedule-tasks-by-priority", "sequence-distributed-events", "privacy", "security", "adapt-scrollbar-to-contrast-preferences", "anchor-positioning-tab-underline", "animate-element-entry-exit", "animate-to-from-top-layer", "animate-to-intrinsic-sizes", "apply-webgl-shaders", "calculate-event-differentials", "calculate-with-intrinsic-sizes", "capture-location-agnostic-data", "carousel-slide-effects", "carousel-snap-highlights", "child-state-based-styling", "complex-shapes", "component-specific-light-dark-theme", "consistent-cross-document-transitions", "content-based-styling", "coordinate-global-events", "cross-document-transitions", "customize-scrollbar-color-and-thickness", "dark-mode", "declarative-dialog-popover-control", "deliver-optimized-decorative-images", "design-token-reactivity", "directional-navigation-transitions", "dynamic-sibling-animations", "dynamic-sibling-styling", "export-html-media-from-canvas", "expose-canvas-content-to-browser-features", "flicker-free-client-side-ab-testing", "fluid-scaling", "format-human-readable-durations", "group-element-transitions", "improve-text-layout-and-legibility", "individual-transform-properties", "interactive-content-in-3d-scenes", "interactive-content-reveal", "interest-triggered-action-previews", "interest-triggered-tooltips", "light-dismiss-a-dialog", "manage-recurring-intervals", "model-partial-time-concepts", "move-dom-element-without-losing-state", "navigation-drawer", "overflow-clipping-control", "parallax-scroll-effects", "persistent-app-tours", "persistent-toast-notifications", "persistent-top-layer-ui", "physics-based-easing", "platform-controls-dismiss-dialog", "position-aware-tooltips", "precise-text-alignment", "prevent-text-wrapping", "pull-to-reveal", "reduce-style-repetition", "resilient-context-menus-and-nested-dropdowns", "same-document-transitions", "scroll-entry-exit-effects", "scroll-position-aware-elements", "scroll-progress-indicator", "scroll-snap-realtime-feedback", "scroll-snap-state-sync", "scroll-target-on-load", "scrollability-affordance-hints", "scrollytelling", "search-hidden-content", "shaped-cutouts", "shrinking-header-on-scroll", "size-aware-styling", "soft-edge-content-fade", "stabilize-reactive-state", "stack-drill-down", "style-parent-with-has", "support-global-calendar-systems", "swipe-to-remove", "visually-stable-font-fallbacks", "visually-stable-mixed-fonts", "visually-texture-content", "agentic-forms", "agentic-javascript-tools", "webmcp" ], "config": { "loaded": false }, "artifacts": [ { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "First-load consent layer", "condition": "fresh profile", "findingIds": [ "F03" ] }, { "type": "screenshot", "path": "evidence/home-after-reject.png", "caption": "Homepage after Reject all", "condition": "desktop 1365x768", "findingIds": [ "F04", "F23" ] }, { "type": "screenshot", "path": "evidence/home-mobile-after-reject.png", "caption": "Homepage at requested mobile viewport", "condition": "viewport 360x800", "findingIds": [ "F05", "F06" ] }, { "type": "screenshot", "path": "evidence/home-dark-reduce-contrast.png", "caption": "Homepage with dark, reduced-motion and higher-contrast preferences", "condition": "dark; reduce; more", "findingIds": [ "F01", "F12" ] }, { "type": "screenshot", "path": "evidence/path-1.png", "caption": "Yahoo News listing", "condition": "desktop", "findingIds": [ "F07" ] }, { "type": "screenshot", "path": "evidence/path-2.png", "caption": "Entertainment listing", "condition": "desktop", "findingIds": [] }, { "type": "screenshot", "path": "evidence/path-3.png", "caption": "Travel listing", "condition": "desktop", "findingIds": [] }, { "type": "dom", "path": "evidence/session-audit.json", "caption": "Combined DOM, style, focus, resource, cookie and preference probes", "condition": "multiple paths/conditions", "findingIds": [ "F01", "F02", "F03", "F05", "F06", "F07", "F09", "F13", "F15", "F16", "F18", "F19", "F22" ] }, { "type": "lighthouse", "path": "evidence/lighthouse.json", "caption": "Lighthouse performance, accessibility, best-practices, SEO and agentic-browsing audit", "condition": "mobile", "findingIds": [ "F08", "F09", "F10", "F11", "F12", "F13", "F15", "F19", "F22", "F23", "F24" ] }, { "type": "discoverability", "path": "evidence/discoverability-cookie.json", "caption": "Cookie-authenticated raw HTML vs rendered text comparison", "condition": "JavaScript unavailable", "findingIds": [ "F17", "F20" ] }, { "type": "dom", "path": "evidence/raw-home.html", "caption": "Cookie-authenticated raw server HTML", "condition": "JavaScript unavailable", "findingIds": [ "F02", "F17", "F20", "F24" ] }, { "type": "heap", "path": "evidence/memory-repeat.json", "caption": "GC baseline and post-navigation Runtime heap/DOM/listener metrics", "condition": "10 alternating navigations", "findingIds": [ "F25" ] }, { "type": "other", "path": "evidence/response-headers.txt", "caption": "Main-document HTTP response headers", "condition": "authenticated consent cookie", "findingIds": [ "F18" ] }, { "type": "other", "path": "evidence/404.html", "caption": "Raw 404 body", "condition": "JavaScript unavailable", "findingIds": [ "F14", "F21" ] }, { "type": "other", "path": "evidence/secrets.json", "caption": "Secrets primitive result on consent entry path", "condition": "fresh profile", "findingIds": [] }, { "type": "other", "path": "evidence/trackers-consent.json", "caption": "Tracker primitive result on consent entry path", "condition": "fresh profile", "findingIds": [ "F19" ] } ], "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": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Under prefers-color-scheme: dark the page declared computed color-scheme: dark and rendered a coherent dark surface.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The CDP preference probe found one running 1000 ms animation both normally and with prefers-reduced-motion: reduce.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/home-dark-reduce-contrast.png" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "The prefers-contrast: more capture retained visible text, borders and controls across the first viewport.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Raw HTML/CSS inspection found no view-transition declarations across the portal and section journeys.", "pathIds": [ "home" ], "artifacts": [ "evidence/raw-home.html", "evidence/session-audit.json" ], "findingIds": [ "F02" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "No scroll-linked animation was present on the representative templates, so implementation technique is not applicable." }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "No gesture-driven carousel, pull-to-refresh or swipe-to-remove interaction was exposed in the audited paths." }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "The long homepage remained navigable through persistent service/navigation chrome without obscuring the primary feed in the inspected state.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "No tooltip/popover/menu requiring edge-aware anchor positioning was opened in the representative browse paths." }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Selected navigation states use visible purple/outlined cues and section headings, as shown on home and News captures.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The first-load screenshot shows a viewport-blocking consent layer before content; DOM inspection reports role=dialog/custom form rather than a native dialog.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/session-audit.json" ], "findingIds": [ "F03" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The first-load screenshot shows a viewport-blocking consent layer before content; DOM inspection reports role=dialog/custom form rather than a native dialog.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/session-audit.json" ], "findingIds": [ "F03" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Homepage screenshot places a 970x250 advertising area above the main news content, alongside a persistent service rail and multiple cards.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-after-reject.png" ], "findingIds": [ "F04" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "At a requested 360x800 mobile viewport, CDP reports innerWidth=1024 and the screenshot shows the right side of the fixed-width portal clipped off.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile-after-reject.png", "evidence/session-audit.json" ], "findingIds": [ "F05" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Stylesheet inspection across the rendered homepage found no @container rules; the fixed desktop cards remain wide in the mobile capture.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile-after-reject.png", "evidence/session-audit.json" ], "findingIds": [ "F06" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The focus probe found all 40 sampled Yahoo News controls with computed outline none, and the homepage voice-search control is 28x28 px.", "pathIds": [ "news" ], "artifacts": [ "evidence/session-audit.json", "evidence/path-1.png" ], "findingIds": [ "F07" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Yahoo branding, search, service navigation and current news are immediately identifiable in the desktop capture.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "The audit followed live links from the portal to News, Entertainment and Travel listings without dead ends or account walls.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "A real 404 response contains only a script that redirects to /?err=404; without JavaScript the user gets no useful recovery UI.", "pathIds": [ "error" ], "artifacts": [ "evidence/404.html" ], "findingIds": [ "F14" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse measured LCP 5.35 s, TBT 476.5 ms, Speed Index 9.1 s and 4.8 s main-thread work; performance score was 0.54.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F08" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "DOM evidence found 84 of 92 homepage images without both width and height attributes; Lighthouse unsized-images failed, although measured CLS was 0.00007 in this run.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "findingIds": [ "F09" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse measured LCP 5.35 s, TBT 476.5 ms, Speed Index 9.1 s and 4.8 s main-thread work; performance score was 0.54.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F08" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse reports 3,308 KiB transferred, about 1,266 KiB potentially unused JavaScript, 35 KiB unused CSS and 1,720 ms render-blocking savings.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F10" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse reports 3,308 KiB transferred, about 1,266 KiB potentially unused JavaScript, 35 KiB unused CSS and 1,720 ms render-blocking savings.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F10" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse found 4 unnamed buttons, one image without alt, one unnamed link, two malformed lists and two label/name mismatches.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F11" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse color-contrast audit failed with two affected node groups.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json", "evidence/home-dark-reduce-contrast.png" ], "findingIds": [ "F12" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse heading-order failed and the CDP focus walk found no visible outline on the first 40 focusable controls on each News template.", "pathIds": [ "news" ], "artifacts": [ "evidence/lighthouse.json", "evidence/session-audit.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Desktop captures show readable Chinese body text and headings with stable line layout on the representative templates.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "At a requested 360x800 mobile viewport, CDP reports innerWidth=1024 and the screenshot shows the right side of the fixed-width portal clipped off. Lighthouse found 4 unnamed buttons, one image without alt, one unnamed link, two malformed lists and two label/name mismatches.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile-after-reject.png", "evidence/session-audit.json", "evidence/lighthouse.json" ], "findingIds": [ "F05", "F11" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "CDP Log/Runtime captured 23 entries including document.write failures and an uncaught React hydration error; Lighthouse also reports four deprecated API warnings.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "findingIds": [ "F15" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "DOM evidence found 84 of 92 homepage images without both width and height attributes; Lighthouse unsized-images failed, although measured CLS was 0.00007 in this run. Lighthouse found 4 unnamed buttons, one image without alt, one unnamed link, two malformed lists and two label/name mismatches.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "findingIds": [ "F09", "F11" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "CDP Log/Runtime captured 23 entries including document.write failures and an uncaught React hydration error; Lighthouse also reports four deprecated API warnings.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "findingIds": [ "F15" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "All four rendered pages had descriptive titles; the homepage and section probes returned non-empty meta descriptions.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "At a requested 360x800 mobile viewport, CDP reports innerWidth=1024 and the screenshot shows the right side of the fixed-width portal clipped off. Cookie-authenticated raw HTML was 588 KB and not a shell, but only 44.2% of words in the rendered sample were found server-side. Title, h1 and description did survive.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile-after-reject.png", "evidence/session-audit.json", "evidence/discoverability-cookie.json", "evidence/raw-home.html" ], "findingIds": [ "F05", "F17" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Rendered DOM probe found an empty canonical value on https://tw.yahoo.com/ while section pages did provide canonicals.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json" ], "findingIds": [ "F16" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "All templates exposed Open Graph metadata and News section templates included JSON-LD.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The 200 response has HSTS, nosniff, X-Frame-Options and a CSP, but the CSP is limited mainly to frame-ancestors/sandbox and no Permissions-Policy is present; one analytics cookie lacked Secure.", "pathIds": [ "home" ], "artifacts": [ "evidence/response-headers.txt", "evidence/session-audit.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The post-rejection homepage loaded 211 resources, 208 from hosts other than tw.yahoo.com, including Google ads and Taboola; Lighthouse lists a 218 KB Taboola loader and 201 KB Google ad script.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json", "evidence/trackers-consent.json" ], "findingIds": [ "F19" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "No geolocation/notification request fired on load; authentication was not part of the anonymous scope, so no password-only claim is made.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The 200 response has HSTS, nosniff, X-Frame-Options and a CSP, but the CSP is limited mainly to frame-ancestors/sandbox and no Permissions-Policy is present; one analytics cookie lacked Secure.", "pathIds": [ "home" ], "artifacts": [ "evidence/response-headers.txt", "evidence/session-audit.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Raw/server HTML retained metadata and some content but only 44.2% of the rendered sample words; important feed content is added client-side.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-cookie.json", "evidence/raw-home.html" ], "findingIds": [ "F20" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Four templates completed navigation and rendered content; representative overlays/subframes did not clip the main desktop content.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "This public news portal is an MPA/content service rather than an installable app; offline installability is contextual." }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The server returned HTTP 404 with a body consisting of window.location.replace and no usable no-script recovery content.", "pathIds": [ "error" ], "artifacts": [ "evidence/404.html" ], "findingIds": [ "F21" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "All four templates declared lang=zh-Hant-TW and rendered Traditional Chinese in left-to-right reading order.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Weather and market data were visibly localized for Taipei/Taiwan with °C and localized number presentation.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "The audited public listing templates expose no event scheduling or user-entered time-zone workflow." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "Reject all and Accept all were equally prominent in the consent layer, ads were labelled, and audited navigation did not force continuity.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "No user-submitted transactional form with validation was present in the audited anonymous browse paths." }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "The only text field is site search; address/payment/sign-in/sign-up autofill is not applicable to this anonymous browse scope." }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "Authenticated account, payment, checkout and cancellation flows were not entered because no credentials or transaction authorization were provided." }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "The homepage probe found 7 images over twice their displayed width and 84/92 without dimensions; Lighthouse estimates 158 KiB image-delivery savings.", "pathIds": [ "home" ], "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "findingIds": [ "F22" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Lighthouse reports 3,308 KiB transferred, about 1,266 KiB potentially unused JavaScript, 35 KiB unused CSS and 1,720 ms render-blocking savings. The post-rejection homepage loaded 211 resources, 208 from hosts other than tw.yahoo.com, including Google ads and Taboola; Lighthouse lists a 218 KB Taboola loader and 201 KB Google ad script.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json", "evidence/session-audit.json", "evidence/trackers-consent.json" ], "findingIds": [ "F10", "F19" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "A 3.3 MiB load includes large Taboola and Google advertising scripts before the core experience has stabilized, contributing to LCP 5.35 s.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json", "evidence/home-after-reject.png" ], "findingIds": [ "F23" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "Raw HTML inspection found no WebMCP or agent-tool registration; Lighthouse agentic-browsing score was 0.5 and its accessibility-tree audit failed.", "pathIds": [ "home" ], "artifacts": [ "evidence/raw-home.html", "evidence/lighthouse.json" ], "findingIds": [ "F24" ] }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement after representative-path recon", "evidence": "", "reason": "No user task in the audited portal requires built-in on-device inference; this emerging capability is contextual." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "After GC and 10 alternating home/news navigations, JS heap fell by 736,376 bytes rather than growing.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "pass", "confidence": "medium", "method": "CDP DOM/evaluate/screenshot probe across representative paths", "evidence": "After GC the homepage used about 30 MB JS heap with roughly 2.3k live DOM elements, proportionate to a dense portal.", "pathIds": [ "home", "news", "entertainment", "travel" ], "artifacts": [ "evidence/session-audit.json" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "issues", "confidence": "high", "method": "CDP DOM/evaluate/screenshot evidence plus Lighthouse or raw HTTP where cited", "evidence": "After GC and 10 alternating home/news navigations, live DOM count returned from 2325 to 2272 and JS heap fell 0.74 MB, but CDP Nodes rose by 1,988 and listeners by 9. This is a low-confidence retained-node signal.", "pathIds": [ "home" ], "artifacts": [ "evidence/memory-repeat.json" ], "findingIds": [ "F25" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F02" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "pass" }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F03", "F04" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F05", "F06", "F07" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F14" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F08", "F09", "F10" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F11", "F12", "F13", "F05" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F15", "F09", "F11" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F05", "F17", "F16" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F18", "F19" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F20", "F21" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass" }, { "principleId": "be-trustworthy", "expectation": "default", "status": "pass" }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F22", "F10", "F19", "F23" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "issues", "findingIds": [ "F24" ] }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F25" ] } ], "paths": [ { "id": "home", "description": "Yahoo Taiwan portal homepage after choosing Reject all; represents search, navigation, weather, finance, feed and advertising surfaces.", "url": "https://tw.yahoo.com/", "conditions": [ "desktop 1365x768", "mobile 360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "prefers-contrast: more", "keyboard focus probe" ], "result": "issues" }, { "id": "news", "description": "Yahoo News index; represents the main news listing template and primary browse journey.", "url": "https://tw.news.yahoo.com/", "conditions": [ "desktop 1365x768", "keyboard focus probe" ], "result": "issues" }, { "id": "entertainment", "description": "Entertainment section listing; represents a topical section template.", "url": "https://tw.news.yahoo.com/entertainment/", "conditions": [ "desktop 1365x768", "keyboard focus probe" ], "result": "issues" }, { "id": "travel", "description": "Travel section listing; second content section used to check template consistency and image behavior.", "url": "https://tw.news.yahoo.com/fun/", "conditions": [ "desktop 1365x768", "keyboard focus probe" ], "result": "issues" }, { "id": "error", "description": "Non-existent route; tests HTTP and no-JavaScript failure behavior.", "url": "https://tw.yahoo.com/web-uplift-audit-nonexistent-404", "conditions": [ "raw HTTP request", "JavaScript unavailable" ], "result": "issues" } ], "findings": [ { "id": "F01", "severity": "medium", "principleId": "respect-user-preferences", "principleCheckId": "respects-reduced-motion", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Animation continues when reduced motion is requested.", "evidence": "The CDP preference probe found one running 1000 ms animation both normally and with prefers-reduced-motion: reduce.", "suggestedFix": "Disable or substantially reduce non-essential animation inside @media (prefers-reduced-motion: reduce).", "artifacts": [ "evidence/session-audit.json", "evidence/home-dark-reduce-contrast.png" ], "effort": "small", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F02", "severity": "low", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "cross-document-transitions", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Route changes do not use View Transitions.", "evidence": "Raw HTML/CSS inspection found no view-transition declarations across the portal and section journeys.", "suggestedFix": "Add cross-document @view-transition opt-in progressively, with a non-animated fallback.", "artifacts": [ "evidence/raw-home.html", "evidence/session-audit.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F03", "severity": "medium", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Initial consent UI fully blocks the page and uses custom dialog markup.", "evidence": "The first-load screenshot shows a viewport-blocking consent layer before content; DOM inspection reports role=dialog/custom form rather than a native dialog.", "suggestedFix": "Keep Reject all equally prominent, reduce obstruction where legally possible, and use a correctly managed native dialog or equivalent focus-safe modal.", "artifacts": [ "evidence/home-desktop.png", "evidence/session-audit.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F04", "severity": "medium", "principleId": "maximize-content-reduce-noise", "principleCheckId": "reduced-chrome", "guidanceId": "reduce visual clutter maximize content", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Advertising and chrome dominate the first useful viewport.", "evidence": "Homepage screenshot places a 970x250 advertising area above the main news content, alongside a persistent service rail and multiple cards.", "suggestedFix": "Defer or reduce above-the-fold advertising and prioritize the news/search content in the initial viewport.", "artifacts": [ "evidence/home-after-reject.png" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F05", "severity": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "fluid-scaling", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Homepage serves a clipped desktop layout on a 360 px viewport.", "evidence": "At a requested 360x800 mobile viewport, CDP reports innerWidth=1024 and the screenshot shows the right side of the fixed-width portal clipped off.", "suggestedFix": "Use a real responsive layout at narrow widths with intrinsic sizing, reflowed navigation and no minimum desktop canvas.", "artifacts": [ "evidence/home-mobile-after-reject.png", "evidence/session-audit.json" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F06", "severity": "low", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Components do not adapt to their containers.", "evidence": "Stylesheet inspection across the rendered homepage found no @container rules; the fixed desktop cards remain wide in the mobile capture.", "suggestedFix": "Introduce container-type and size-aware @container rules for reusable feed, market and weather cards.", "artifacts": [ "evidence/home-mobile-after-reject.png", "evidence/session-audit.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F07", "severity": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Many controls lack visible focus and some targets are undersized.", "evidence": "The focus probe found all 40 sampled Yahoo News controls with computed outline none, and the homepage voice-search control is 28x28 px.", "suggestedFix": "Use :focus-visible with a strong outline and make touch targets at least 44 CSS px where practical.", "artifacts": [ "evidence/session-audit.json", "evidence/path-1.png" ], "effort": "medium", "pathId": "news", "url": "https://tw.news.yahoo.com/" }, { "id": "F08", "severity": "high", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Mobile load is slow and main-thread work is heavy.", "evidence": "Lighthouse measured LCP 5.35 s, TBT 476.5 ms, Speed Index 9.1 s and 4.8 s main-thread work; performance score was 0.54.", "suggestedFix": "Prioritize the LCP resource, shorten server/document latency, defer non-critical work and split long tasks.", "artifacts": [ "evidence/lighthouse.json" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F09", "severity": "medium", "principleId": "be-fast-and-stable", "principleCheckId": "visual-stability", "guidanceId": "prevent layout shift reserve space CLS aspect-ratio", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Most images lack explicit dimensions.", "evidence": "DOM evidence found 84 of 92 homepage images without both width and height attributes; Lighthouse unsized-images failed, although measured CLS was 0.00007 in this run.", "suggestedFix": "Emit width/height or aspect-ratio for every image so space is reserved before bytes arrive.", "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F10", "severity": "high", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "The page ships a large amount of unused code and blocking resources.", "evidence": "Lighthouse reports 3,308 KiB transferred, about 1,266 KiB potentially unused JavaScript, 35 KiB unused CSS and 1,720 ms render-blocking savings.", "suggestedFix": "Code-split by surface, conditionally load rewards/ads, remove duplicate or legacy bundles, and defer non-critical scripts/styles.", "artifacts": [ "evidence/lighthouse.json" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F11", "severity": "high", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Interactive and image semantics are incomplete.", "evidence": "Lighthouse found 4 unnamed buttons, one image without alt, one unnamed link, two malformed lists and two label/name mismatches.", "suggestedFix": "Provide accessible names and alt text, repair list semantics and ensure visible labels match accessible names.", "artifacts": [ "evidence/lighthouse.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F12", "severity": "high", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Some text does not meet minimum contrast.", "evidence": "Lighthouse color-contrast audit failed with two affected node groups.", "suggestedFix": "Adjust foreground/background tokens to meet WCAG AA in every theme and state.", "artifacts": [ "evidence/lighthouse.json", "evidence/home-dark-reduce-contrast.png" ], "effort": "small", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F13", "severity": "medium", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Heading order and keyboard focus treatment are inconsistent.", "evidence": "Lighthouse heading-order failed and the CDP focus walk found no visible outline on the first 40 focusable controls on each News template.", "suggestedFix": "Use sequential headings and a consistent, high-contrast :focus-visible treatment in DOM reading order.", "artifacts": [ "evidence/lighthouse.json", "evidence/session-audit.json" ], "effort": "medium", "pathId": "news", "url": "https://tw.news.yahoo.com/" }, { "id": "F14", "severity": "medium", "principleId": "support-core-task-success", "principleCheckId": "clear-system-state-and-recovery", "guidanceId": "loading empty error success retry undo cancel state", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "The error route depends on JavaScript to recover.", "evidence": "A real 404 response contains only a script that redirects to /?err=404; without JavaScript the user gets no useful recovery UI.", "suggestedFix": "Serve an HTML error page with a clear explanation, home/search links and retry actions before enhancing it with JavaScript.", "artifacts": [ "evidence/404.html" ], "effort": "small", "pathId": "error", "url": "https://tw.yahoo.com/web-uplift-audit-nonexistent-404" }, { "id": "F15", "severity": "medium", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "avoid console errors uncaught exceptions", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Representative pages emit runtime and platform errors.", "evidence": "CDP Log/Runtime captured 23 entries including document.write failures and an uncaught React hydration error; Lighthouse also reports four deprecated API warnings.", "suggestedFix": "Fix hydration mismatch and asynchronous document.write usage, then remove deprecated APIs and restore valid source maps.", "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F16", "severity": "medium", "principleId": "be-discoverable", "principleCheckId": "canonical-and-indexing-signals", "guidanceId": "canonical hreflang http status robots sitemap noindex seo indexing", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Homepage omits a canonical URL.", "evidence": "Rendered DOM probe found an empty canonical value on https://tw.yahoo.com/ while section pages did provide canonicals.", "suggestedFix": "Add an absolute self-referencing canonical and verify localized hreflang/robots/sitemap consistency.", "artifacts": [ "evidence/session-audit.json" ], "effort": "small", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F17", "severity": "medium", "principleId": "be-discoverable", "principleCheckId": "crawlable-and-mobile-friendly", "guidanceId": "crawlable links viewport meta robots descriptive link text", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "A no-JavaScript crawler sees substantially less content.", "evidence": "Cookie-authenticated raw HTML was 588 KB and not a shell, but only 44.2% of words in the rendered sample were found server-side. Title, h1 and description did survive.", "suggestedFix": "Server-render the primary headline/link content and retain real hrefs so crawlers and agents receive the same useful page.", "artifacts": [ "evidence/discoverability-cookie.json", "evidence/raw-home.html" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F18", "severity": "medium", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Browser-enforced policy coverage is incomplete.", "evidence": "The 200 response has HSTS, nosniff, X-Frame-Options and a CSP, but the CSP is limited mainly to frame-ancestors/sandbox and no Permissions-Policy is present; one analytics cookie lacked Secure.", "suggestedFix": "Harden CSP beyond framing, add a least-privilege Permissions-Policy and mark all HTTPS cookies Secure.", "artifacts": [ "evidence/response-headers.txt", "evidence/session-audit.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F19", "severity": "high", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "A large third-party advertising/analytics footprint remains after Reject all.", "evidence": "The post-rejection homepage loaded 211 resources, 208 from hosts other than tw.yahoo.com, including Google ads and Taboola; Lighthouse lists a 218 KB Taboola loader and 201 KB Google ad script.", "suggestedFix": "Audit consent enforcement, remove non-essential third parties after rejection, batch analytics and delay advertising until policy permits.", "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json", "evidence/trackers-consent.json" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F20", "severity": "high", "principleId": "be-resilient", "principleCheckId": "progressive-enhancement", "guidanceId": "progressive enhancement graceful degradation no javascript baseline fallback", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Core rendered content is not fully available without JavaScript.", "evidence": "Raw/server HTML retained metadata and some content but only 44.2% of the rendered sample words; important feed content is added client-side.", "suggestedFix": "Server-render core headlines and navigation, then hydrate enhancements without replacing the baseline content.", "artifacts": [ "evidence/discoverability-cookie.json", "evidence/raw-home.html" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F21", "severity": "high", "principleId": "be-resilient", "principleCheckId": "network-and-http-failure-states", "guidanceId": "http error network failure timeout retry stale data resilient state", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "The 404 fallback is a JavaScript-only redirect.", "evidence": "The server returned HTTP 404 with a body consisting of window.location.replace and no usable no-script recovery content.", "suggestedFix": "Return a complete semantic 404 document with navigation and retry/search options.", "artifacts": [ "evidence/404.html" ], "effort": "small", "pathId": "error", "url": "https://tw.yahoo.com/web-uplift-audit-nonexistent-404" }, { "id": "F22", "severity": "medium", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "optimize-image-priority", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Image delivery wastes bytes.", "evidence": "The homepage probe found 7 images over twice their displayed width and 84/92 without dimensions; Lighthouse estimates 158 KiB image-delivery savings.", "suggestedFix": "Serve responsive srcset/sizes, modern formats and correctly sized variants, while reserving aspect ratio.", "artifacts": [ "evidence/session-audit.json", "evidence/lighthouse.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F23", "severity": "high", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "deprioritize-background-fetches", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "Third-party code is disproportionate to initial user value.", "evidence": "A 3.3 MiB load includes large Taboola and Google advertising scripts before the core experience has stabilized, contributing to LCP 5.35 s.", "suggestedFix": "Set a third-party budget, defer ads/recommendation code and remove integrations that do not justify their byte and CPU cost.", "artifacts": [ "evidence/lighthouse.json", "evidence/home-after-reject.png" ], "effort": "large", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F24", "severity": "low", "principleId": "be-agent-ready", "principleCheckId": "structured-agent-capabilities", "guidanceId": "webmcp", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "The portal exposes no structured agent capability.", "evidence": "Raw HTML inspection found no WebMCP or agent-tool registration; Lighthouse agentic-browsing score was 0.5 and its accessibility-tree audit failed.", "suggestedFix": "For suitable search/news tasks, expose narrowly scoped, permission-aware WebMCP tools while preserving normal forms and links.", "artifacts": [ "evidence/raw-home.html", "evidence/lighthouse.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" }, { "id": "F25", "severity": "low", "principleId": "be-memory-efficient", "principleCheckId": "no-detached-dom-or-unbounded-listeners", "guidanceId": "manage-recurring-intervals", "guidanceCategory": "modern-web-guidance", "confidence": "high", "summary": "DOM-related memory grows after repeated navigation despite stable live DOM.", "evidence": "After GC and 10 alternating home/news navigations, live DOM count returned from 2325 to 2272 and JS heap fell 0.74 MB, but CDP Nodes rose by 1,988 and listeners by 9. This is a low-confidence retained-node signal.", "suggestedFix": "Profile retained nodes/listeners with heap snapshots, identify detached subframes/ad widgets, and clean listeners/observers on navigation.", "artifacts": [ "evidence/memory-repeat.json" ], "effort": "medium", "pathId": "home", "url": "https://tw.yahoo.com/" } ], "taskList": [ { "id": "T01", "title": "Build a true narrow-screen responsive layout", "priority": 1, "findingIds": [ "F05", "F06", "F07" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T02", "title": "Reduce and defer JavaScript, ads and render-blocking resources", "priority": 2, "findingIds": [ "F08", "F10", "F19", "F23" ], "guidanceId": "identify-heavy-scripts", "status": "open" }, { "id": "T03", "title": "Repair accessible names, contrast, headings and focus", "priority": 3, "findingIds": [ "F07", "F11", "F12", "F13" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T04", "title": "Server-render core content and a real 404 fallback", "priority": 4, "findingIds": [ "F14", "F17", "F20", "F21" ], "guidanceId": "progressive enhancement graceful degradation no javascript baseline fallback", "status": "open" }, { "id": "T05", "title": "Optimize and dimension images", "priority": 5, "findingIds": [ "F09", "F22" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T06", "title": "Harden privacy and browser policies", "priority": 6, "findingIds": [ "F18", "F19" ], "guidanceId": "privacy", "status": "open" }, { "id": "T07", "title": "Remove runtime errors and deprecated APIs", "priority": 7, "findingIds": [ "F15" ], "guidanceId": "avoid console errors uncaught exceptions", "status": "open" }, { "id": "T08", "title": "Reduce consent/ad interruption", "priority": 8, "findingIds": [ "F03", "F04" ], "guidanceId": "light-dismiss-a-dialog", "status": "open" }, { "id": "T09", "title": "Investigate retained DOM/listener growth", "priority": 9, "findingIds": [ "F25" ], "guidanceId": "manage-recurring-intervals", "status": "open" }, { "id": "T10", "title": "Add canonical and structured agent affordances", "priority": 10, "findingIds": [ "F16", "F24" ], "guidanceId": "webmcp", "status": "open" } ], "budget": { "pathCount": 5, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-20T21-27-49-055Z" }