How jQuery determines whether an input is disabled

How jQuery determines whether the input is disabled: 1. Use the function [is(":disabled")] to determine; 2. Use the function [prop("disabled")] to determine; 3. Use the function [attr ("disabled")】judgment.

The operating environment of this tutorial: windows10 system, jquery2.2.4, this article is applicable to all brands of computers.

Recommendation: "jquery video tutorial"

JQuery method to determine whether input is disabled:

Judge whether input is disabled Disabled, available methods are:

● is(":disabled")

● prop("disabled")

● attr("disabled")

<script src="jquery.min.js"></script>
 <br/><input type="text" id="first" disabled>first
 <br/><input type="text" id="second" disabled <br/><input type="text" id="third">third
 <script>
     var v1, v2, v3;
     v1 = $("#first").is(":disabled");  // true / false
     v2 = $("#first").prop("disabled"); // true / false
     v3 = $("#first").attr("disabled"); // disabled / undefined
     console.log(v1);
     console.log(v2);
     console.log(v3);
     v1 = $("#second").is(":disabled");  // true / false
     v2 = $("#second").prop("disabled"); // true / false
     v3 = $("#second").attr("disabled"); // disabled / undefined
     console.log(v1);
     console.log(v2);
     console.log(v3);
     v1 = $("#third").is(":disabled");  // true / false
     v2 = $("#third").prop("disabled"); // true / false
     v3 = $("#third").attr("disabled"); // disabled / undefined
     console.log(v1);
     console.log(v2);
     console.log(v3);
 </script>

Page results:

Console output:

Use prop to set disable and undisable:

$("#first").prop("disabled",true);      //禁用
$("#first").prop("disabled",false);     //可编辑
$("#first").prop("disabled",“disabled”);//禁用
$("#first").prop("disabled",“”);        //可编辑

Use attribute settings to disable and undisable:

$("#first").attr("disabled",true);      //禁用
$("#first").attr("disabled",false);     //可编辑
$("#first").attr("disabled","disabled");//禁用
$("#first").attr("disabled","");        //禁用
$("#first").removeAttr("disabled");     //可编辑

Related free learning recommendations: JavaScript (video)

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