javascript - 将 JavaScript 方法移至全局范围

Question

在 JavaScript 中，是否可以将内部函数从一个函数移至全局作用域？我还没有找到任何直接的方法来做到这一点。

function moveMethodsIntoGlobalScope(functionName){
    //move all of functionName's methods into the global scope
    //methodsToPutIntoGlobalScope should be used as the input for this function.
}

//I want all of the methods in this function to be moved into the global scope so that they can be called outside this function.
function methodsToPutInGlobalScope(){
    function alertSomething(){
        alert("This should be moved into the global scope, so that it can be called from outside the function that encloses it.");
    }
    function alertSomethingElse(){
        alert("This should also be moved into the global scope.");
    }
}

Answer 1

如果您不想在 methodsToPutInGLobalSpace 中进行更改，您可以使用以下肮脏的技巧:

var parts = methodsToPutInGlobalScope.toString().split('\n');
eval(parts.splice(1, parts.length - 2).join(''));

作为最终解决方案，我们可以使用:

moveMethodsIntoGlobalScope(methodsToPutInGlobalScope);
alertSomething(); //why doesn't this work?

function moveMethodsIntoGlobalScope(functionName){
    var parts = functionName.toString().split('\n');
    eval.call(window, parts.splice(1, parts.length - 2).join(''));  
}

//I want all of the methods in this function to be moved into the global scope so that they can be called outside this function.
function methodsToPutInGlobalScope(){
    function alertSomething(){
        alert("This should be moved into the global scope, so that it can be called from outside the function that encloses it.");
    }
    function alertSomethingElse(){
        alert("This should also be moved into the global scope.");
    }
}

Live demo