The difference between attr and prop in jquery
When should I use prop after the introduction of the prop method in the high version of jquery? When do you use attr? What's the difference between the two of them? These problems have arisen.
There are a lot of answers on the internet about their two differences. Here to talk about my experience, my experience is very simple:
For HTML elements that have intrinsic properties, use the Prop method when processing. For HTML elements our own custom DOM properties, when processing, use the Attr method.
The above description may be a little vague, as you can see in a few examples. <a href= "http://www.baidu.com" target= "_self" class= "BTN" > Baidu </a> This example <a> the DOM attribute of the element has "href, Target and class, these attributes are the attributes of the <a> element itself, and are the attributes that are included in the standard, or that can be intelligently prompted in the IDE, which are called intrinsic properties. The prop method is recommended when working with these properties. <a href= "#" id= "Link1" action= "delete" > Delete </a> in this case the DOM attribute of the <a> element has "href, id, and action", it is clear that the first two are intrinsic properties, And the next "action" attribute is our own custom,<a> element itself does not have this property. This is a custom DOM property. The attr method is recommended when working with these properties. When you use the Prop method to take values and set property values, the undefined value is returned.
One more example: <input id= "Chk1" type= "checkbox"/> Visible <input id= "chk2" type= "checkbox" checked= "checked"/> Visible
For elements like Checkbox,radio and select, the selected attribute corresponds to "checked" and "selected", which are also intrinsic properties, so you need to use the Prop method to operate to get the correct results.
$ ("#chk1"). Prop ("checked") = = false$ ("#chk2"). Prop ("checked") = = True
If the attr method is used above, it will appear: $ ("#chk1"). attr ("checked") = = undefined$ ("#chk2"). attr ("checked") = = "Checked"
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The difference between attr and prop in jquery
