Viewport units: vw, vh, vmin, vmax

- CR

Length units representing a percentage of the current viewport dimensions: width (vw), height (vh), the smaller of the two (vmin), or the larger of the two (vmax).

Chrome

  1. 4 - 19: Not supported
  2. 20 - 25: Partial support
  3. 26 - 125: Supported
  4. 126: Supported
  5. 127 - 129: Supported

Edge

  1. 12 - 15: Partial support
  2. 16 - 125: Supported
  3. 126: Supported

Safari

  1. 3.1 - 5.1: Not supported
  2. 6: Partial support
  3. 6.1 - 17.4: Supported
  4. 17.5: Supported
  5. 17.6 - TP: Supported

Firefox

  1. 2 - 18: Not supported
  2. 19 - 127: Supported
  3. 128: Supported
  4. 129 - 131: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 110: Supported
  3. 111: Supported

IE

  1. 5.5 - 8: Not supported
  2. 9: Partial support
  3. 10: Partial support
  4. 11: Partial support

Chrome for Android

  1. 126: Supported

Safari on iOS

  1. 3.2 - 5.1: Not supported
  2. 6: Partial support
  3. 7: Partial support
  4. 8 - 17.4: Supported
  5. 17.5: Supported
  6. 17.6 - 18.0: 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 - 4.3: Not supported
  2. 4.4 - 4.4.4: Supported
  3. 126: Supported

Firefox for Android

  1. 127: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
Back-Forward issue blog post
Blog post
Buggyfill - Polyfill that fixes buggy support
Polyfill