The disabled attribute

disabled makes a form element inactive — unresponsive to interaction, skipped by Tab, and its value is NOT submitted with the form.

Applies to

input, button, select, textarea, fieldset, option

Values

A boolean attribute: its mere presence disables the element.

Example

<button type="submit" disabled>Please wait...</button>

Edge cases

Unlike readonly, a disabled field's value is not included in the submitted form data at all.
disabled on a fieldset disables every form element inside it at once.

Accessibility

Disabled elements drop out of the Tab order and aren't announced as interactive — make sure that's actually the behavior you want, not just a "looks inactive" style.

Related tools

The <button> tag

The type attribute of the <button> tag: submit, button, reset — the difference, with examples.

The <input> tag

Types and attributes of the <input> tag: type, name, value, required, pattern.