What are the wildcards in the jQuery selector

This article will explain in detail what are the wildcards in the jQuery selector. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

1. Selector

(1) wildcard characters:

$("input [id ^ = 'code']"); / / all input tags where the id attribute begins with code

$("input [id $= 'code']"); / / all input tags whose id attribute ends with code

$("input [id * = 'code']"); / / the id attribute includes all input tags of code

(2) choose according to the index.

$("input [id ^ = 'code']"); / / all input tags where the id attribute begins with code

$("input [id $= 'code']"); / / all input tags whose id attribute ends with code

$("input [id * = 'code']"); / / the id attribute includes all input tags of code

(3) obtain the number of input of the next level node of jQueryObj

JqueryObj.children ("input"). Length

(4) get all tags under the child node of the tag whose class is main

$(".main > a")

(5) Select the label next to it

JqueryObj.next ("div"); / / get the 1 div,nextAll immediately after the jqueryObj tag to get all

two。 Selector

/ / not

$("# code input:not ([id ^ = 'code'])"); / / id is a code tag that does not include all input tags that id begins with code

3. Event

/ / handle keyboard operations on the text box

JqueryObj.keyup (function (event) {

Var keyCode = event.which;// gets the key value of the currently pressed keyboard, and the enter key is 13

}

4. Tool function

$('# someField') .val ($.trim ($('# someField') .val (); / / blanking, syntax: $.trim (value)

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