:placeholder-shown CSS pseudo-class

- WD

Input elements can sometimes show placeholder text as a hint to the user on what to type in. See, for example, the placeholder attribute in HTML5. The :placeholder-shown pseudo-class matches an input element that is showing such placeholder text.

IE

  1. 5.5 - 9
  2. 10
  3. 11

Edge

  1. 12 - 18
  2. 79 - 81
  3. 83

Firefox

  1. 2 - 3.6
  2. 4 - 50
  3. 51 - 75
  4. 76
  5. 77 - 78

Chrome

  1. 4 - 46
  2. 47 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 8
  2. 9 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 33
  2. 34 - 67
  3. 68

iOS Safari

  1. 3.2 - 8.4
  2. 9 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4
  2. 5 - 10.1
  3. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

For support of styling the actual placeholder text itself, see CSS ::placeholder

Resources:
WebKit commit
Firefox bug
Microsoft Edge feature request on UserVoice