Can I use
?

Lazy loading via attribute for images & iframes

- LS

The loading attribute on images & iframes gives authors control over when the browser should start loading the resource.

Chrome

  1. ❌ 4 - 74: Not supported
  2. ❌ 75 - 76: Disabled by default
  3. ✅ 77 - 134: Supported
  4. ✅ 135: Supported
  5. ✅ 136 - 138: Supported

Edge

  1. ❌ 12 - 18: Not supported
  2. ✅ 79 - 134: Supported
  3. ✅ 135: Supported

Safari

  1. ❌ 3.1 - 13: Not supported
  2. ❌ 13.1 - 15.3: Disabled by default
  3. ❌ 15.4 - 16.3: Disabled by default
  4. ✅ 16.4 - 18.3: Supported
  5. ✅ 18.4: Supported
  6. ✅ 18.5 - TP: Supported

Firefox

  1. ❌ 2 - 74: Not supported
  2. ◐ 75 - 120: Partial support
  3. ✅ 121 - 136: Supported
  4. ✅ 137: Supported
  5. ✅ 138 - 140: Supported

Opera

  1. ❌ 9 - 60: Not supported
  2. ❌ 62 - 63: Disabled by default
  3. ✅ 64 - 116: Supported
  4. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 135: Supported

Safari on iOS

  1. ❌ 3.2 - 13.3: Not supported
  2. ❌ 13.4 - 15.3: Disabled by default
  3. ❌ 15.4 - 16.3: Disabled by default
  4. ✅ 16.4 - 18.3: Supported
  5. ✅ 18.4: Supported
  6. ✅ 18.5: Supported

Samsung Internet

  1. ❌ 4 - 11.2: Not supported
  2. ✅ 12.0 - 26: Supported
  3. ✅ 27: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 12.1: Not supported
  2. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ✅ 135: Supported

Firefox for Android

  1. ✅ 137: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ❌ 2.5: Not supported
  2. ◐ 3: Partial support
Resources:
Blog post
Firefox support bug for lazy loading iframes
Polyfill
Explainer
WebKit support bug