Name Description Size Coverage
animated -
background-image-set-image.html Background image-set images should be LCP candidates 1293 -
broken-image-icon.html Broken Image Icon Should Not Be LCP 1549 -
contracted-image.html Largest Contentful Paint: contracted image bounded by display size. 1286 -
cross-origin-image.sub.html Largest Contentful Paint: observe cross-origin images but without renderTime. 1183 -
element-only-when-fully-active.html Largest Contentful Paint: element is only exposed for fully active documents. 669 -
expanded-image.html Largest Contentful Paint: expanded image bounded by intrinsic size. 1329 -
first-letter-background.html Largest Contentful Paint: observe element with background image in its first letter 3451 -
first-paint-equals-lcp-text.html LargestContentfulPaint compared with FirstPaint and FirstContentfulPaint on single text page. 2372 -
idlharness.html Largest Contentful Paint IDL tests 1022 -
iframe-content-not-observed.html Largest Contentful Paint: do NOT observe elements from same-origin iframes 884 -
image-full-viewport.html Largest Contentful Paint: size when image overflows 1792 -
image-inside-svg.html Largest Contentful Paint: observe image inside SVG 1056 -
image-not-fully-visible.html Largest Contentful Paint: size when image overflows 2456 -
image-removed-before-load.html Largest Contentful Paint: largest image is reported. 1686 -
image-src-change.html Largest Contentful Paint: src change triggers new entry. 2422 -
image-sw-same-origin.https.html Largest Contentful Paint: same-origin service worker should not be treated as TAO-fail 1370 -
image-TAO.sub.html Largest Contentful Paint: observe cross origin images with various Timing-Allow-Origin headers 2528 -
image-upscaling-empty-url.html Largest Contentful Paint: Largest image is reported. 5457 -
image-upscaling.html Largest Contentful Paint: Largest image is reported. 5914 -
initially-invisible-images.html Largest Contentful Paint: initially out-of-viewport image gets an LCP entry once they are visible. 2033 -
invisible-images-composited-1.html Largest Contentful Paint: invisible images are not observable 1225 -
invisible-images-composited-2.html Largest Contentful Paint: invisible images are not observable 797 -
invisible-images.html Largest Contentful Paint: invisible images are not observable 852 -
larger-image.html Largest Contentful Paint: largest image is reported. 2149 -
larger-text.html Largest Contentful Paint: largest text is reported. 3453 -
loadTime-after-appendChild.html Largest Contentful Paint: delayed appended image. 1320 -
META.yml 110 -
multiple-image-same-src.html Largest Contentful Paint:dynamically appended image with different dimensions but same src triggers new entry. 2233 -
multiple-redirects-TAO.html This test validates some Timing-Allow-Origin header usage in multiple redirects. 2841 -
observe-after-untrusted-scroll.html Largest Contentful Paint: observe image. 1207 -
observe-css-generated-image.html Largest Contentful Paint: observe element with css generated image 1108 -
observe-css-generated-text.html 3932 -
observe-image.html Largest Contentful Paint: observe image. 1040 -
observe-mathml.html Largest Contentful Paint: observe element rendered by MathML 1691 -
observe-random-namespace.html Largest Contentful Paint: observe element created in a random namespace 1837 -
observe-svg-background-image.html Largest Contentful Paint: observe image. 1302 -
observe-svg-data-uri-background-image.html Largest Contentful Paint: observe image. 1542 -
observe-svg-data-uri-image.html Largest Contentful Paint: observe image. 1281 -
observe-svg-image.html Largest Contentful Paint: observe SVG image. 1044 -
observe-text.html Largest Contentful Paint: observe text. 2145 -
placeholder-image.html Largest Contentful Paint: src change triggers new entry. 1273 -
progressively-loaded-image.html Largest Contentful Paint: Progressively Loaded Image 2003 -
redirects-tao-star.html This test validates LargestContentfulPaint information for cross-origin redirect chain images. 2160 -
repeated-image.html Largest Contentful Paint: repeated image. 1739 -
resized-image-not-reconsidered.html Resized Image Is Not Reconsidered as LCP. 1881 -
resources -
same-origin-redirects.html This test validates LargestContentfulPaint for same-origin redirect chain. 1332 -
supported-lcp-type.html PerformanceObserver.supportedEntryTypes contains "largest-contentful-paint" 686 -
text-with-display-style.html Largest Contentful Paint: observe text with display style. 3232 -
toJSON.html Largest Contentful Paint: toJSON 1335 -
transparent-text-with-shadow.html 1457 -
transparent-text-with-text-stroke.html 1475 -
transparent-text.html 1322 -
update-on-style-change.html LargestContentfulPaint entries should NOT be emitted for updates to previous LargestContentfulPaint elements. 1213 -
video-data-uri.html This test verifies a video element of data uri src triggers an LCP entry to be emitted 2560 -
video-play-after-poster.html This test verifies a video element only triggers a single LCP entry 1917 -
video-poster.html Largest Contentful Paint: observe video poster image 1087 -
web-font-styled-text-resize-block.html 1940 -
web-font-styled-text-resize-swap-after-interaction.html 3514 -
web-font-styled-text-resize-swap-smaller.html 2121 -
web-font-styled-text-resize-swap-subnode.html 2275 -
web-font-styled-text-resize-swap.html 2209 -
WEB_FEATURES.yml 57 -