Can I use
?

getComputedStyle

- REC

API to get the current computed CSS styles applied to an element. This may be the current value applied by an animation or as set by a stylesheet.

Chrome

  1. ◐ 4 - 10: Partial support
  2. ✅ 11 - 156: Supported
  3. ✅ 157: Supported
  4. ✅ 158 - 160: Supported

Edge

  1. ✅ 12 - 155: Supported
  2. ✅ 156: Supported

Safari

  1. ◐ 3.1 - 4: Partial support
  2. ✅ 5 - 27.1: Supported
  3. ✅ 27.2: Supported
  4. ✅ 27.3 - TP: Supported

Firefox

  1. ❌ 2: Not supported
  2. ◐ 3 - 3.6: Partial support
  3. ✅ 4 - 159: Supported
  4. ✅ 160: Supported
  5. ✅ 161 - 163: Supported

Opera

  1. ◐ 9 - 10.5: Partial support
  2. ✅ 10.6 - 138: Supported
  3. ✅ 139: Supported

IE

  1. ❌ 5.5 - 8: Not supported
  2. ✅ 9 - 10: Supported
  3. ✅ 11: Supported

Chrome for Android

  1. ✅ 157: Supported

Safari on iOS

  1. ◐ 3.2 - 4.3: Partial support
  2. ✅ 5 - 26.6: Supported
  3. ✅ 27.0: Supported
  4. ✅ 27.1 - 27.2: Supported

Samsung Internet

  1. ✅ 4 - 30: Supported
  2. ✅ 31: Supported

Opera Mini

  1. ◐ all: Partial support

Opera Mobile

  1. ◐ 10: Partial support
  2. ✅ 11 - 12.1: Supported
  3. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ◐ 2.1 - 3: Partial support
  2. ✅ 4 - 4.4.4: Supported
  3. ✅ 157: Supported

Firefox for Android

  1. ✅ 160: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
MDN Web Docs - getComputedStyle
Polyfill for IE
Demo