Can I use
?

Declarative Shadow DOM

- UNOFF

Proposal to allow rendering elements with shadow dom (aka web components) using server-side rendering.

Chrome

  1. 4 - 84: Not supported
  2. 85 - 89: Disabled by default
  3. 90 - 110: Supported
  4. 111: Supported
  5. 112 - 114: Supported

Edge

  1. 12 - 89: Not supported
  2. 90 - 110: Supported
  3. 111: Supported

Safari

  1. 3.1 - 16.2: Not supported
  2. 16.3: Not supported
  3. 16.4 - TP: Supported

Firefox

  1. 2 - 110: Not supported
  2. 111: Not supported
  3. 112 - 113: Not supported

Opera

  1. 9 - 76: Not supported
  2. 77 - 94: Supported
  3. 95: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 111: Supported

Safari on iOS

  1. 3.2 - 16.2: Not supported
  2. 16.3: Not supported
  3. 16.4: Supported

Samsung Internet

  1. 4 - 14.0: Not supported
  2. 15.0 - 19.0: Supported
  3. 20: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Supported

UC Browser for Android

  1. 13.4: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 111: Supported

Firefox for Android

  1. 110: Not supported

QQ Browser

  1. 13.1: Not supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported
Resources:
WebKit support bug
Declarative Shadow DOM - web.dev article
A ponyfill of the Declarative Shadow DOM API