Can I use
?

Element.getBoundingClientRect()

- WD

Method to get the size and position of an element's bounding box, relative to the viewport.

IE

  1. 5.5 - 7: Partial support
  2. 8: Partial support
  3. 9 - 10: Supported
  4. 11: Supported

Edge

  1. 12 - 18: Supported
  2. 79 - 86: Supported
  3. 87: Supported

Firefox

  1. 2: Not supported
  2. 3: Partial support
  3. 3.5: Partial support
  4. 3.6: Partial support
  5. 4 - 11: Partial support
  6. 12 - 83: Supported
  7. 84: Supported
  8. 85 - 86: Supported

Chrome

  1. 4 - 86: Supported
  2. 87: Supported
  3. 88 - 90: Supported

Safari

  1. 3.1 - 3.2: Support unknown
  2. 4 - 13.1: Supported
  3. 14: Supported
  4. TP: Supported

Opera

  1. 9 - 9.6: Support unknown
  2. 10 - 10.5: Partial support
  3. 10.6 - 71: Supported
  4. 72: Supported

iOS Safari

  1. 3.2: Support unknown
  2. 4 - 13.7: Supported
  3. 14: Supported

Opera Mini

  1. all: Supported

Android Browser

  1. 2.1 - 2.2: Support unknown
  2. 2.3 - 4.4.4: Supported
  3. 81: Supported

Opera Mobile

  1. 10: Partial support
  2. 11 - 12.1: Supported
  3. 59: Supported

Chrome for Android

  1. 87: Supported

Firefox for Android

  1. 83: Supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 12.0: Supported
  2. 13.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Supported
Resources:
MDN Web Docs - getBoundingClientRect
Microsoft Developer Network