JS method example of traversing object properties

The example in this article describes the method of JS traversing object properties. I share it with you for your reference. The details are as follows:

Method to traverse all the attribute names and values ​​of a JavaScript object. This way it is very intuitive and convenient when you want to use the method. The code is as follows:

/*
* 用来遍历指定对象所有的属性名称和值
* obj 需要遍历的对象
* author: Jet Mah
*/
function allPrpos ( obj ) {
// 用来保存所有的属性名称和值
var props = "" ;
// 开始遍历
for ( var p in obj ){
// 方法
if ( typeof ( obj [ p ]) == " function " ){
obj [ p ]() ;
} else {
// p 为属性名称，obj[p]为对应属性的值
props += p + " = " + obj [ p ] + " \t " ;
}
}
// 最后显示所有的属性
alert ( props ) ;
}

AJAX's JavaScript reflection mechanism. The reflection mechanism means that the program can obtain its own information when it is running. For example, an object can know at runtime what methods and properties it has. In JavaScript, the for(…in…) statement is used to implement reflection. The syntax is as follows:

<script type="text/javascript">
// 创建一个对象 myObject 以及三个属性 sitename, siteurl, sitecontent。
var myObject = new Object();
myObject.sitename = "sara";
myObject.siteurl = "http://www.php.cn/";
myObject.sitecontent = "php中文网";
//遍历对象的所有属性
for (prop in myObject)
{
document.write("属性 &#39;" + prop + "&#39; 为 " + myObject[prop]);
document.write(" ");
}
</script>

I hope this article will be helpful to everyone in JavaScript programming.

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