<input readonly>

Attribute of
<input> HTML Tag
What does <input readonly> do?
Disallows the user from editing the value of the input.

Code Example

 <label for="favorite-animal">What is your favorite animal?</label><br>
 <input value="Flamingo" readonly>

readonly vs. disabled

The readonly and disabled attributes have superficially similar behaviors — they both stop the user from editing the value of the <input> element. However, there is a big difference. The value of the readonly element will be included when the form is submitted to the server. The value of a disabled element will not be submitted to the server.

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Browser Support for readonly