{"source":"semconv","version":"1.44.0","attribute":{"id":"browser.web_vital.name","type":"enum","enumMembers":[{"id":"cls","value":"cls","stability":"development","brief":"Cumulative Layout Shift. See [cls](https://web.dev/articles/cls)."},{"id":"lcp","value":"lcp","stability":"development","brief":"Largest Contentful Paint. See [lcp](https://web.dev/articles/lcp)."},{"id":"fcp","value":"fcp","stability":"development","brief":"First Contentful Paint. See [fcp](https://web.dev/articles/fcp)."},{"id":"inp","value":"inp","stability":"development","brief":"Interaction to Next Paint. See [inp](https://web.dev/articles/inp)."},{"id":"ttfb","value":"ttfb","stability":"development","brief":"Time to First Byte. See [ttfb](https://web.dev/articles/ttfb)."},{"id":"fid","value":"fid","stability":"development","brief":"First Input Delay. See [fid](https://web.dev/articles/fid).","deprecated":{"reason":"obsoleted","note":"Replaced by Interaction to Next Paint (`inp`), which became a Core Web Vital in March 2024. See [inp](https://web.dev/articles/inp)."}}],"stability":"development","brief":"Name of the web vital.","examples":["cls"],"namespace":"browser","definedIn":"model/browser/registry.yaml","usedBy":[{"groupId":"event.browser.web_vital","groupType":"event","signalName":"browser.web_vital","requirementLevel":"required"}]},"history":[{"version":"1.44.0","publishedAt":"2026-08-04T20:00:58Z","kind":"first-seen","detail":"Added as development.","severity":"informational"}],"replaces":[]}