A declarative API to allow the creation of #shadowroot's using only HTML and no Javascript. Sign up for an Origin Trial (M85-M89) here: https://developers.chrome.com/origintrials/#/register_trial/2024368032503037953 Blog post: https://web.dev/declarative-shadow-dom/


This API allows Web Components that use Shadow DOM to also make use of Server-Side Rendering (SSR), to get rendered content onscreen quickly without requiring Javascript for shadow root attachment.




Public discussion

Status in Chromium


Origin trial (tracking bug) in:

  • Chrome for desktop release 90
  • Chrome for Android release 90
  • Android WebView release 90

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Intent to Prototype url

Intent to Prototype thread

Search tags

Shadow DOM, Declarative,

Last updated on 2021-01-14