How to add or remove attribute onclick in jquery

You can add or remove attribute accordingly to your need in jquery. You can add disabled or readonly in input type element. To make the disable a button we use attr.

HTML

<a href="#0" id="add">Add Disabled</a>
<a href="#0" id="remove">Remove Disabled</a>
<input type="text" id="test">

You can add or remove attribute in input type having test id.

Jquery

$( "#add" ).click(function() {
  $("#test").attr("disabled","disabled");
});
$( "#remove" ).click(function() {
  $("#test").removeAttr("disabled");
});