获取所有用户定义的窗口属性? [英] Get all user defined window properties?

问题描述

有没有办法在javascript中找出所有用户定义的窗口属性和变量(全局变量)?

Is there a way to find out all user defined window properties and variables (global variables) in javascript?

我尝试了 console.log(window) 但列表是无穷无尽的.

I tried console.log(window) but the list is endless.

推荐答案

您需要自己完成这项工作.在第一时间阅读所有属性.从那时起，您可以将属性列表与静态列表进行比较.

You would need to do the work for yourself. Read in all properties, on the first possible time you can. From that point on, you can compare the property list with your static one.

var globalProps = [ ];

function readGlobalProps() {
    globalProps = Object.getOwnPropertyNames( window );
}

function findNewEntries() {
    var currentPropList = Object.getOwnPropertyNames( window );

    return currentPropList.filter( findDuplicate );

    function findDuplicate( propName ) {
        return globalProps.indexOf( propName ) === -1;
    }
}

所以现在，我们可以像

// on init
readGlobalProps();  // store current properties on global object

以后

window.foobar = 42;

findNewEntries(); // returns an array of new properties, in this case ['foobar']

<小时>

当然，这里需要注意的是，您只能在脚本最早能够调用全局属性列表时冻结"它.

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Of course, the caveat here is, that you can only "freeze" the global property list at the time where your script is able to call it the earliest time.

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