::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.

IE

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

Edge

  1. 12 - 18: Partial support
  2. 79: Supported
  3. 80: Supported

Firefox

  1. 2 - 18: Not supported
  2. 19 - 50: Supported
  3. 51 - 73: Supported
  4. 74: Supported
  5. 75 - 76: Supported

Chrome

  1. 4 - 56: Partial support
  2. 57 - 79: Supported
  3. 80: Supported
  4. 81 - 83: Supported

Safari

  1. 3.1 - 4: Not supported
  2. 5 - 10: Partial support
  3. 10.1 - 12.1: Supported
  4. 13: Supported
  5. 13.1 - TP: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 43: Partial support
  3. 44 - 65: Supported
  4. 66: Supported

iOS Safari

  1. 3.2 - 4.1: Not supported
  2. 4.2 - 10.2: Partial support
  3. 10.3 - 13.2: Supported
  4. 13.3: Supported
  5. 13.4: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Partial support
  2. 80: Supported

Blackberry Browser

  1. 7: Partial support
  2. 10: Partial support

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Supported

Chrome for Android

  1. 80: Supported

Firefox for Android

  1. 68: Supported

IE Mobile

  1. 10: Partial support
  2. 11: Partial support

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 6.4: Partial support
  2. 7.2 - 10.1: Supported
  3. 11.1: Supported

QQ Browser

  1. 1.2: Partial support

Baidu Browser

  1. 7.12: 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:
CSSWG discussion
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