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 - 153: Not supported
  4. ❌ 154: Not supported
  5. ❌ 155 - 157: Not supported

Edge

  1. ❌ 12 - 18: Not supported
  2. ✅ 79 - 113: Supported
  3. ❌ 114 - 153: Not supported
  4. ❌ 154: Not supported

Safari

  1. ﹖ 3.1 - 3.2: Support unknown
  2. ✅ 4 - 11.1: Supported
  3. ❌ 12 - 26.6: Not supported
  4. ❌ 27: Not supported
  5. ❌ 27.1 - TP: Not supported

Firefox

  1. ❌ 2 - 157: Not supported
  2. ❌ 158: Not supported
  3. ❌ 159 - 161: Not supported

Opera

  1. ❌ 9 - 12.1: Not supported
  2. ✅ 15 - 99: Supported
  3. ❌ 100 - 134: Not supported
  4. ❌ 135: Not supported

IE

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

Chrome for Android

  1. ❌ 154: Not supported

Safari on iOS

  1. ﹖ 3.2: Support unknown
  2. ✅ 4 - 11.4: Supported
  3. ❌ 12 - 26.6: Not supported
  4. ❌ 27.0: Not supported
  5. ❌ 27.1 - 27.2: Not supported

Samsung Internet

  1. ✅ 4 - 29: Supported
  2. ✅ 30: 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. ❌ 154: Not supported

Firefox for Android

  1. ❌ 157: 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"