The content of this article is about jQuery events? The introduction of jquery events has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
Page loading
The load event is provided in the DOM for the execution mechanism after the page is loaded. jQuery provides the ready() method to achieve similar functions, but there are the following differences.
1. The load event in DOM does not have any abbreviated form, but the abbreviated form is provided in jQuery's ready() method.
2. The load event will be triggered only after the HTML page is loaded; and after the DOM node tree is loaded, the ready() method will be called.
3. Only one load event can exist in an HTML page, but multiple ready() methods can exist.
The syntax structure of the ready() method:
1.$(document).ready(function(){});
2.$().ready(function(){});//简写
3.$(function(){});//简写
Event binding
Single event binding and single event unbinding
Single event binding
jQuery provides the bind() method to complete the binding event. The syntax is as follows
$element.bind(type,data,callback);
type: indicates the name of the binding event, which is a string type. There is no 'on'.
data: Additional data object (optional) passed to the event object as the element.data property value.
callback: Represents the processing function of the binding event.
The sample code is as follows:
<button>按钮</button>
<script>
function click1(){
console .log('this is button,');
}
$('#btn').bind('click',click1);</script>
Single event unbinding
jQuery provides the unbind() method to unbind events. The specific method is as follows:
$element.unbind(type[,data,callback]);
$('#btn').unbind('click');//只传递事件名称，解绑定该事件的所有处理函数。
$('#btn').undind('click'click1);//传递时间名称和指定的处理函数，解绑定该事件的指定处理函数。
Multiple event binding and unbinding
<style>
#title {
width: 100px;
height: 20px;
border: 1px solid black;
}
ul {
list-style: none;
padding: 0;
display: none;
}
li {
width: 100px;
height: 20px;
border: 1px solid black;
}
</style>
<p>菜单</p>
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