Can I use
?

readonly attribute of input and textarea elements

- LS

Makes the form control non-editable. Unlike the disabled attribute, readonly form controls are still included in form submissions and the user can still select (but not edit) their value text.

Chrome

  1. ﹖ 4 - 25: Support unknown
  2. ✅ 26 - 135: Supported
  3. ✅ 136: Supported
  4. ✅ 137 - 139: Supported

Edge

  1. ✅ 12 - 135: Supported
  2. ✅ 136: Supported

Safari

  1. ﹖ 3.1 - 5: Support unknown
  2. ✅ 5.1 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ TP: Supported

Firefox

  1. ﹖ 2 - 3.6: Support unknown
  2. ✅ 4 - 137: Supported
  3. ✅ 138: Supported
  4. ✅ 139 - 141: Supported

Opera

  1. ﹖ 9 - 9.6: Support unknown
  2. ◐ 10 - 12.1: Partial support
  3. ✅ 15 - 116: Supported
  4. ✅ 117: Supported

IE

  1. ﹖ 5.5: Support unknown
  2. ✅ 6 - 10: Supported
  3. ✅ 11: Supported

Chrome for Android

  1. ✅ 136: Supported

Safari on iOS

  1. ﹖ 3.2 - 6.1: Support unknown
  2. ✅ 7 - 18.4: Supported
  3. ✅ 18.5: Supported

Samsung Internet

  1. ✅ 4 - 26: Supported
  2. ✅ 27: Supported

Opera Mini

  1. ✅ all: Supported

Opera Mobile

  1. ◐ 10 - 12.1: Partial support
  2. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ﹖ 2.1 - 2.2: Support unknown
  2. ✅ 2.3 - 4.4.4: Supported
  3. ✅ 136: Supported

Firefox for Android

  1. ✅ 137: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
MDN Web Docs - readonly attribute
WHATWG HTML specification for the readonly attribute of the `<textarea>` element