Small, Large, and Dynamic viewport units

- WD

Viewport units similar to vw and vh that are based on shown or hidden browser UI states to address shortcomings of the original units. Currently defined as the sv* units (svbsvhsvisvmaxsvminsvw), lv* units (lvblvhlvilvmaxlvminlvw), dv* units (dvbdvhdvidvmaxdvmindvw) and the logical vi/vb units.

Chrome

  1. 4 - 99: Not supported
  2. 100 - 107: Disabled by default
  3. 108 - 125: Supported
  4. 126: Supported
  5. 127 - 129: Supported

Edge

  1. 12 - 104: Not supported
  2. 105 - 107: Disabled by default
  3. 108 - 125: Supported
  4. 126: Supported

Safari

  1. 3.1 - 15.3: Not supported
  2. 15.4 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6 - TP: Supported

Firefox

  1. 2 - 100: Not supported
  2. 101 - 127: Supported
  3. 128: Supported
  4. 129 - 131: Supported

Opera

  1. 9 - 90: Not supported
  2. 91 - 93: Disabled by default
  3. 94 - 110: Supported
  4. 111: Supported

IE

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

Chrome for Android

  1. 126: Supported

Safari on iOS

  1. 3.2 - 15.3: Not supported
  2. 15.4 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6 - 18.0: Supported

Samsung Internet

  1. 4 - 20: Not supported
  2. 21 - 24: Supported
  3. 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: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 126: Supported

Firefox for Android

  1. 127: Supported

QQ Browser

  1. 14.9: Not supported

Baidu Browser

  1. 13.52: Not supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported
Resources:
Chromium support bug
WebKit support bug
Firefox support bug
MDN Web Docs - Relative length units based on viewport
Blog post explaining the new units