Minimum length attribute for input fields

- LS

Declares a lower bound on the number of characters a user can input.

IE

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

Edge

  1. 12 - 16: Not supported
  2. 17 - 79: Supported
  3. 80: Supported

Firefox

  1. 2 - 50: Not supported
  2. 51 - 72: Supported
  3. 73: Supported
  4. 74 - 75: Supported

Chrome

  1. 4 - 39: Not supported
  2. 40 - 79: Supported
  3. 80: Supported
  4. 81 - 83: Supported

Safari

  1. 3.1 - 10: Not supported
  2. 10.1 - 12.1: Supported
  3. 13: Supported
  4. TP: Supported

Opera

  1. 9 - 26: Not supported
  2. 27 - 65: Supported
  3. 66: Supported

iOS Safari

  1. 3.2 - 10.2: Not supported
  2. 10.3 - 13.1: Supported
  3. 13.2: Supported
  4. 13.3: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 80: Supported

Blackberry Browser

  1. 7: Not supported
  2. 10: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Supported

Chrome for Android

  1. 80: Supported

Firefox for Android

  1. 68: Supported

IE Mobile

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

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 9.2: Supported
  3. 10.1: Supported

QQ Browser

  1. 1.2: Not supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Not supported

The pattern attribute can be used as an alternative solution for browsers without support.

Resources:
WebKit feature request bug
Firefox tracking bug
Microsoft Edge feature request on UserVoice
W3C usage example