How jquery handles events

Jquery's method of handling events: 1. Unregister the event handler, the code is [$('*').unbind();]; 2. Trigger the event [trigger();]; 3. Customize Event, the code is [$('div').click(function(){$.event.trigg].

The operating environment of this tutorial: windows7 system , jquery3.2.1 version, Dell G3 computer.

Recommendation: jquery video tutorial

##jquery event processing method:

Simple registration of event handlers

//单击任意div时，使其背景变成黄色
$('div').click(function(){   $(this).css({backgroundColor:'yellow'});  });
//toggle(),   将多个事件处理程序函数绑定到单击事件, 按顺序一次调用一个函数;
$('div').toggle(function(){this.innerText='0'},function(){this.innerText='1'},function(){this.innerText='2'},);
//hover(), 用来给mouseenter 和 mouseleave事件注册事件处理函数
第一个参数是mouseenterHandler , 第二个参数是mouseleaveHandler,      
如果mouseenterHandler 与mouseleaveHandler相同， 可以合并，只学一个Handler函数

Advanced registration of event handlers

bind();

// 最简单的使用bind方法
 $('div').bind('click','牛逼的bind()',function(event){this.innerText = event.data});

Unbind event handler

unbind()

$(’*’).unbind() ; //从所有元素中移除所有的jQuery事件处理程序

Trigger event

##trigger();

Custom event

//用户单击div , 广播一个自定义事件what事件;
$('div').bind('what',function(event){console.log(event.type)});
$('div').click(function(){$.event.trigger('what')});

Real-time event

##delegate();

undelegate();

##Related learning recommendations:

js video tutorial

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