如何获取函数内创建的变量？ [英] How to get the variables that were created inside a function?

问题描述

我在node.js中执行javascript文件，我需要访问在该文件中创建的所有变量。由于这些javascript文件可以包含任何内容，具体取决于开发人员上下文，我需要以编程方式访问变量。

I'm executing javascript files in node.js, and I need to access all the variables that were created in that file. Since these javascript files can hold anything depending on the developer context I need to access the variables programatically.

我的问题是：如何获取在函数内创建的变量？这样的事情：

My question is: How to get the variables that were created inside a function? Something like this:

function test(){
    var a = 'hello world';
    var b = 100;
}

console.log(test.variables);
// -> { "a": 'hello world', "b": 100 }

这有可能吗？

推荐答案

不，您需要在对象中返回这些值。

No, you need to return those values in an object.

function test(){
    var a = 'hello world',
        b = 100;
    return {
      a: a,
      b: b
    };
}

console.log(test); //  { "a": 'hello world', "b": 100 }

或者你可以将这些值保存到函数范围之外的变量：

Or you can save those values to a variable that exists outside of the function scope:

var variables = null;
function test(){
    var a = 'hello world',
        b = 100;
    variables = {
      a: a,
      b: b
    };
}
console.log(variables); //  { "a": 'hello world', "b": 100 }

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