CSS overflow: overlay

- UNOFF

The overlay value of the overflow CSS property is a non-standard value to make scrollbars appear on top of content rather than take up space. This value is deprecated and related functionality being standardized as the scrollbar-gutter property.

Chrome

  1. 4 - 14: Support unknown
  2. 15 - 113: Supported
  3. 114 - 125: Not supported
  4. 126: Not supported
  5. 127 - 129: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 113: Supported
  3. 114 - 124: Not supported
  4. 125: Not supported

Safari

  1. 3.1 - 3.2: Support unknown
  2. 4 - 11.1: Supported
  3. 12 - 17.4: Not supported
  4. 17.5: Not supported
  5. 17.6 - TP: Not supported

Firefox

  1. 2 - 126: Not supported
  2. 127: Not supported
  3. 128 - 130: Not supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 99: Supported
  3. 100 - 109: Not supported
  4. 110: Not supported

IE

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

Chrome for Android

  1. 125: Not supported

Safari on iOS

  1. 3.2: Support unknown
  2. 4 - 11.4: Supported
  3. 12 - 17.4: Not supported
  4. 17.5: Not supported
  5. 17.6 - 18.0: Not supported

Samsung Internet

  1. 4 - 24: Supported
  2. 25: 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: Supported
  2. 125: Not supported

Firefox for Android

  1. 126: Not supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported
Resources:
MDN article on overflow values
WebKit change to make "overflow: overlay" a synonym for "overflow: auto"