Can I use
?

Minimum length attribute for input fields

- LS

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

Chrome

  1. 4 - 39: Not supported
  2. 40 - 122: Supported
  3. 123: Supported
  4. 124 - 126: Supported

Edge

  1. 12 - 16: Not supported
  2. 17 - 122: Supported
  3. 123: Supported

Safari

  1. 3.1 - 10: Not supported
  2. 10.1 - 17.3: Supported
  3. 17.4: Supported
  4. 17.5 - TP: Supported

Firefox

  1. 2 - 50: Not supported
  2. 51 - 123: Supported
  3. 124: Supported
  4. 125 - 127: Supported

Opera

  1. 9 - 26: Not supported
  2. 27 - 108: Supported
  3. 109: Supported

IE

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

Chrome for Android

  1. 123: Supported

Safari on iOS

  1. 3.2 - 10.2: Not supported
  2. 10.3 - 17.3: Supported
  3. 17.4: Supported
  4. 17.5: Supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 23: Supported
  3. 24: 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: Not supported
  2. 123: Supported

Firefox for Android

  1. 124: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Supported

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

Resources:
WebKit feature request bug
Firefox tracking bug
W3C usage example