Introduction to the use of wildcards in jQuery's selectors_jquery

1. Selector
(1) wildcard:

Copy code The code is as follows:

$("input[id^='code']");//All input tags whose id attribute starts with code
$("input[id$='code']");//The id attribute starts with code All input tags ending in
$("input[id*='code']"); //All input tags whose id attribute contains code

(2) Select

Copy code The code is as follows:

$("tbody tr:even"); //Select index All tr ​​tags with even numbers
$("tbody tr:odd"); //Select all tr ​​tags with odd indexes

(3) Get the input number of the next-level node of jqueryObj Number

Copy code The code is as follows:

jqueryObj.children("input").length;

(4) Get all tags under the child nodes of the tag with class main

Copy code The code is as follows:

$(".main > a");

(5) Select the label immediately adjacent to

Copy code The code is as follows:

jqueryObj.next("div");//Get the div immediately behind the jqueryObj tag , nextAll gets all

2. Filter

Copy code The code is as follows:

//not
$("#code input:not([id^='code'])");//The id is the code tag and does not contain all input tags whose id starts with code

3. Event

Copy code The code is as follows:

/ /Handle keyboard operations on the text box
jqueryObj.keyup(function(event){
var keyCode = event.which;//Get the key value of the currently pressed keyboard, the Enter key is 13
}

4. Tool function

Copy code The code is as follows:

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