Can I use
?

ECMAScript 5 Strict Mode

- OTHER

Method of placing code in a "strict" operating context.

Chrome

  1. ❌ 4 - 12: Not supported
  2. ✅ 13 - 130: Supported
  3. ✅ 131: Supported
  4. ✅ 132 - 134: Supported

Edge

  1. ✅ 12 - 130: Supported
  2. ✅ 131: Supported

Safari

  1. ❌ 3.1 - 4: Not supported
  2. ◐ 5 - 5.1: Partial support
  3. ✅ 6 - 18.0: Supported
  4. ✅ 18.1: Supported
  5. ✅ 18.2 - TP: Supported

Firefox

  1. ❌ 2 - 3.6: Not supported
  2. ✅ 4 - 131: Supported
  3. ✅ 132: Supported
  4. ✅ 133 - 135: Supported

Opera

  1. ❌ 9 - 11.5: Not supported
  2. ✅ 11.6 - 113: Supported
  3. ✅ 114: Supported

IE

  1. ❌ 5.5 - 9: Not supported
  2. ✅ 10: Supported
  3. ✅ 11: Supported

Chrome for Android

  1. ✅ 130: Supported

Safari on iOS

  1. ❌ 3.2 - 4.3: Not supported
  2. ✅ 5 - 18.0: Supported
  3. ✅ 18.1: Supported
  4. ✅ 18.2: Supported

Samsung Internet

  1. ✅ 4 - 25: Supported
  2. ✅ 26: Supported

Opera Mini

  1. ✅ all: Supported

Opera Mobile

  1. ❌ 10 - 11.1: Not supported
  2. ✅ 11.5 - 12.1: Supported
  3. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ❌ 2.1 - 2.3: Not supported
  2. ✅ 3 - 4.4.4: Supported
  3. ✅ 130: Supported

Firefox for Android

  1. ✅ 130: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
Article with test suite
Information page