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IntersectionObserver

- WD

API that can be used to understand the visibility and position of DOM elements relative to a containing element or to the top-level viewport. The position is delivered asynchronously and is useful for understanding the visibility of elements and implementing pre-loading and deferred loading of DOM content.

Chrome

  1. ❌ 4 - 50: Not supported
  2. ◐ 51 - 57: Partial support
  3. ✅ 58 - 64: Supported
  4. ✅ 65 - 130: Supported
  5. ✅ 131: Supported
  6. ✅ 132 - 134: Supported

Edge

  1. ❌ 12 - 14: Not supported
  2. ◐ 15: Partial support
  3. ✅ 16 - 18: Supported
  4. ✅ 79 - 130: Supported
  5. ✅ 131: Supported

Safari

  1. ❌ 3.1 - 12: Not supported
  2. ✅ 12.1 - 18.0: Supported
  3. ✅ 18.1: Supported
  4. ✅ 18.2 - TP: Supported

Firefox

  1. ❌ 2 - 51: Not supported
  2. ❌ 52 - 54: Disabled by default
  3. ✅ 55 - 131: Supported
  4. ✅ 132: Supported
  5. ✅ 133 - 135: Supported

Opera

  1. ❌ 9 - 37: Not supported
  2. ◐ 38 - 44: Partial support
  3. ✅ 45 - 63: Supported
  4. ✅ 64 - 113: Supported
  5. ✅ 114: Supported

IE

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

Chrome for Android

  1. ✅ 131: Supported

Safari on iOS

  1. ❌ 3.2 - 12.1: Not supported
  2. ✅ 12.2 - 18.0: Supported
  3. ✅ 18.1: Supported
  4. ✅ 18.2: Supported

Samsung Internet

  1. ❌ 4: Not supported
  2. ◐ 5 - 6.4: Partial support
  3. ✅ 7.2 - 25: Supported
  4. ✅ 26: 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. ✅ 131: Supported

Firefox for Android

  1. ✅ 132: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ❌ 2.5: Not supported
  2. ✅ 3: Supported
Resources:
MDN Web Docs - Intersection Observer
Google Developers article
Polyfill
Sub-features:
IntersectionObserver V2