Can I use
?

gap property for Flexbox

- WD

gap for flexbox containers to create gaps/gutters between flex items

Chrome

  1. ❌ 4 - 83: Not supported
  2. ✅ 84 - 136: Supported
  3. ✅ 137: Supported
  4. ✅ 138 - 140: Supported

Edge

  1. ❌ 12 - 83: Not supported
  2. ✅ 84 - 136: Supported
  3. ✅ 137: Supported

Safari

  1. ❌ 3.1 - 14: Not supported
  2. ✅ 14.1 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0 - TP: Supported

Firefox

  1. ❌ 2 - 62: Not supported
  2. ✅ 63 - 138: Supported
  3. ✅ 139: Supported
  4. ✅ 140 - 142: Supported

Opera

  1. ❌ 9 - 69: Not supported
  2. ✅ 70 - 116: Supported
  3. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 137: Supported

Safari on iOS

  1. ❌ 3.2 - 14.4: Not supported
  2. ✅ 14.5 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0: Supported

Samsung Internet

  1. ❌ 4 - 13.0: Not supported
  2. ✅ 14.0 - 27: Supported
  3. ✅ 28: 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. ✅ 137: Supported

Firefox for Android

  1. ✅ 139: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ❌ 2.5: Not supported
  2. ✅ 3: Supported
Resources:
Chrome bug to track implementation
Webkit support bug
MDN browser compatibility
Workaround using negative margins
Spec discussion