Can I use
?

Element.getBoundingClientRect()

- WD

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

Chrome

  1. 4 - 108: Supported
  2. 109: Supported
  3. 110 - 112: Supported

Edge

  1. 12 - 18: Supported
  2. 79 - 108: Supported
  3. 109: Supported

Safari

  1. 3.1 - 3.2: Support unknown
  2. 4 - 16.2: Supported
  3. 16.3: Supported
  4. TP: 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 - 108: Supported
  7. 109: Supported
  8. 110 - 111: Supported

Opera

  1. 9 - 9.6: Support unknown
  2. 10 - 10.5: Partial support
  3. 10.6 - 93: Supported
  4. 94: Supported

IE

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

Chrome for Android

  1. 109: Supported

Safari on iOS

  1. 3.2: Support unknown
  2. 4 - 16.2: Supported
  3. 16.3: Supported

Samsung Internet

  1. 4 - 18.0: Supported
  2. 19.0: Supported

Opera Mini

  1. all: Supported

Opera Mobile

  1. 10: Partial support
  2. 11 - 12.1: Supported
  3. 73: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 2.2: Support unknown
  2. 2.3 - 4.4.4: Supported
  3. 109: Supported

Firefox for Android

  1. 109: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

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