jquery sets/cancels readonly and disabled attributes for elements

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jquery sets readonly and disabled of elements

1.readonly

$('input').attr("readonly","readonly")//将input元素设置为readonly
$('input').removeAttr("readonly");//去除input元素的readonly属性
  
if($('input').attr("readonly")==true)//判断input元素是否已经设置了readonly属性

There are two other ways to set the readonly attribute and cancel the readonly attribute for an element as follows:

$('input').attr("readonly",true)//将input元素设置为readonly
$('input').attr("readonly",false)//去除input元素的readonly属性

$('input').attr("readonly","readonly")//将input元素设置为readonly
$('input').attr("readonly","")//去除input元素的readonly属性

2.disabled

$('input').attr("disabled","disabled")//将input元素设置为disabled
$('input').removeAttr("disabled");//去除input元素的disabled属性
  
if($('input').attr("disabled")==true)//判断input元素是否已经设置了disabled属性

There are two other ways to set the disabled attribute and cancel the disabled attribute for an element:

$('input').attr("disabled",true)//将input元素设置为disabled
$('input').attr("disabled",false)//去除input元素的disabled属性

$('input').attr("disabled","disabled")//将input元素设置为disabled
$('input').attr("disabled","")//去除input元素的disabled属性

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