readonly attribute of input and textarea elements

99.33

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.

Further reading:

1. Can I use page for: readonly attribute of input and textarea elements
2. WHATWG HTML specification for the readonly attribute of the `<textarea>` element
3. MDN Web Docs - readonly attribute