Can I use ?

Cross-document messaging

- LS

Method of sending information from a page on one domain to a page on a different one (using postMessage)

Chrome

  1. ✅ 4 - 140: Supported
  2. ✅ 141: Supported
  3. ✅ 142 - 144: Supported

Edge

  1. ✅ 12 - 140: Supported
  2. ✅ 141: Supported

Safari

  1. ❌ 3.1 - 3.2: Not supported
  2. ✅ 4 - 18.6: Supported
  3. ✅ 26.0: Supported
  4. ✅ 26.1 - TP: Supported

Firefox

  1. ❌ 2: Not supported
  2. ✅ 3 - 142: Supported
  3. ✅ 143: Supported
  4. ✅ 144 - 146: Supported

Opera

  1. ❌ 9: Not supported
  2. ✅ 9.5 - 121: Supported
  3. ✅ 122: Supported

IE

  1. ❌ 5.5 - 7: Not supported
  2. ◐ 8 - 9: Partial support
  3. ◐ 10: Partial support
  4. ◐ 11: Partial support

Chrome for Android

  1. ✅ 141: Supported

Safari on iOS

  1. ✅ 3.2 - 18.6: Supported
  2. ✅ 26.0: Supported
  3. ✅ 26.1: Supported

Samsung Internet

  1. ✅ 4 - 27: Supported
  2. ✅ 28: Supported

Opera Mini

  1. ✅ all: Supported

Opera Mobile

  1. ✅ 10 - 12.1: Supported
  2. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ✅ 2.1 - 4.4.4: Supported
  2. ✅ 141: Supported

Firefox for Android

  1. ✅ 143: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
MDN Web Docs - window.postMessage
Simple demo
has.js test
WebPlatform Docs
Sub-features:
Channel messaging