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 - 121: Supported
  4. 122: Supported
  5. 123 - 125: Supported

Edge

  1. 12 - 104: Not supported
  2. 105 - 107: Disabled by default
  3. 108 - 120: Supported
  4. 121: Supported

Safari

  1. 3.1 - 15.3: Not supported
  2. 15.4 - 17.2: Supported
  3. 17.3: Supported
  4. 17.4 - TP: Supported

Firefox

  1. 2 - 100: Not supported
  2. 101 - 122: Supported
  3. 123: Supported
  4. 124 - 126: Supported

Opera

  1. 9 - 90: Not supported
  2. 91 - 93: Disabled by default
  3. 94 - 105: Supported
  4. 106: Supported

IE

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

Chrome for Android

  1. 121: Supported

Safari on iOS

  1. 3.2 - 15.3: Not supported
  2. 15.4 - 17.2: Supported
  3. 17.3: Supported
  4. 17.4: Supported

Samsung Internet

  1. 4 - 20: Not supported
  2. 21 - 22: Supported
  3. 23: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Not supported

UC Browser for Android

  1. 15.5: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 121: Supported

Firefox for Android

  1. 122: Supported

QQ Browser

  1. 13.1: Not supported

Baidu Browser

  1. 13.18: 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