tryjsref_prototype_date 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p id="demo">单击按钮来调用新的myMet()方法,并显示这个月的月份，,使用新的myProp方法</p>
<button onclick="myFunction()">点我</button>
<script>
Date.prototype.myMet=function(){
    if (this.getMonth()==0){this.myProp="一月"};
    if (this.getMonth()==1){this.myProp="二月"};
    if (this.getMonth()==2){this.myProp="三月"};
    if (this.getMonth()==3){this.myProp="四月"};
    if (this.getMonth()==4){this.myProp="五月"};
    if (this.getMonth()==5){this.myProp="六月"};
    if (this.getMonth()==6){this.myProp="七月"};
    if (this.getMonth()==7){this.myProp="八月"};
    if (this.getMonth()==8){this.myProp="九月"};
    if (this.getMonth()==9){this.myProp="十月"};
    if (this.getMonth()==10){this.myProp="十一月"};
    if (this.getMonth()==11){this.myProp="十二月"};
}
function myFunction(){
    var d = new Date();
    d.myMet();
    var x=document.getElementById("demo");
    x.innerHTML=d.myProp;
}
</script>
</body>
</html>
 
 
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运行结果
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