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.

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 14
  2. 15
  3. 16 - 18
  4. 79 - 81
  5. 83

Firefox

  1. 2 - 51
  2. 52 - 54
  3. 55 - 75
  4. 76
  5. 77 - 78

Chrome

  1. 4 - 50
  2. 51 - 57
  3. 58 - 64
  4. 65 - 81
  5. 83
  6. 84 - 86

Safari

  1. 3.1 - 12
  2. 12.1 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 37
  2. 38 - 44
  3. 45 - 63
  4. 64 - 67
  5. 68

iOS Safari

  1. 3.2 - 12.1
  2. 12.2 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4
  2. 5 - 6.4
  3. 7.2 - 10.1
  4. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5
Resources:
MDN Web Docs - Intersection Observer
Google Developers article
Polyfill
Sub-features:
IntersectionObserver V2