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Detailed explanation of JS event model

小云云Original: 2018-03-22 16:22:291804browse

This article mainly shares with you the detailed explanation of the JS event model, mainly in the form of code, hoping to help everyone.

1. Inline model

<body>
<input  type="button" value="test1" onclick=&#39; alert("dian ji shi jian")&#39;/>
<input type="button" value="test2" onclick="dian()" />
<script>
    function dian(){
        alert("dian ji shi jian")
    }
</script>
</body>

2. Script model

<body>
<input type="button" value="test3" id="dian1"/>
<input type="button" value="test4" id="dian2"/>
<input type="button" value="test5" id="dian3"/>
<script>
    //可通过匿名函数
    var dian1 = document.getElementById(&#39;dian1&#39;);//首先找到这个ID
    dian1.onclick = function(){//根据ID付给它一个点击事件
        alert(&#39;dian ji shi jian&#39;);
    };

    //通过函数赋值
    function dianji(){
        alert(&#39;dian ji shi jian&#39;);
    };
    var dian2 = document.getElementById(&#39;dian2&#39;);
    dian2.onclick=dianji;

    //得到元素的名字
    var dian3 = document.getElementById(&#39;dian3&#39;);
    dian3.onclick = function(){
        alert(this.tagName);
    };

    //删除点击事件
    var dian3 = document.getElementById(&#39;dian3&#39;);
    var count=0;
    dian3.onclick = function(){
        alert(count++);
        if(count==3){
           dian3.onclick = null;
        }
    };
</script>
</body>

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