Shadow DOM v0 (removed)

Shadow DOM v0 is deprecated at M70, and will be removed in M80, by February, 2020. Please see this post for more information: For the original Intent to Deprecate: Shadow DOM v0 was an experimental technology, never implemented in any other browser. The spec is superseded by Shadow DOM v1, which is widely supported.

Shadow DOM V0, Custom Elements V0, and HTML Imports were launched in 2014, but they did not get adopted by other browser engines. Instead, Shadow DOM V1, Custom Elements V1, and ES modules are widely adopted by various browser engines today. Chrome has shipped Shadow DOM V1 / Custom Elements V1 in 2016 and ES modules in 2017.


Enabled in M35. The old prefixed implementation we had since M25 is being deprecated, please watch out for deprecation warnings in the devtools console. Updated IE views based on ("Under consideration"). Latest spec: see also for the styling aspects.



Working draft or equivalent

Status in Chromium


Removed (tracking bug) in:

  • Chrome for desktop release 80
  • Chrome for Android release 80

Consensus & Standardization

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


Last updated on 2020-08-27