::placeholder CSS pseudo-element

- WD

The ::placeholder pseudo-element represents placeholder text in an input field: text that represents the input and provides a hint to the user on how to fill out the form. For example, a date-input field might have the placeholder text YYYY-MM-DD to clarify that numeric dates are to be entered in year-month-day order.

Chrome

  1. 4 - 56: Partial support
  2. 57 - 108: Supported
  3. 109: Supported
  4. 110 - 112: Supported

Edge

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

Safari

  1. 3.1 - 4: Not supported
  2. 5 - 10: Partial support
  3. 10.1 - 16.2: Supported
  4. 16.3: Supported
  5. TP: Supported

Firefox

  1. 2 - 18: Not supported
  2. 19 - 50: Supported
  3. 51 - 108: Supported
  4. 109: Supported
  5. 110 - 111: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 43: Partial support
  3. 44 - 91: Supported
  4. 92: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 109: Supported

Safari on iOS

  1. 3.2 - 4.1: Not supported
  2. 4.2 - 10.2: Partial support
  3. 10.3 - 16.2: Supported
  4. 16.3: Supported

Samsung Internet

  1. 4 - 6.4: Partial support
  2. 7.2 - 18.0: Supported
  3. 19.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 72: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Partial support
  2. 109: Supported

Firefox for Android

  1. 107: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported

Partial support refers to using alternate names: ::-webkit-input-placeholder for Chrome/Safari/Opera (Chrome issue #623345) ::-ms-input-placeholder for Edge (also supports webkit prefix)

Resources:
Mozilla Bug 1069012 - unprefix :placeholder-shown pseudo-class and ::placeholder pseudo-element
CSS-Tricks article with all prefixes
MDN Web Docs - CSS ::-moz-placeholder
MDN web docs - ::placeholder
CSSWG discussion