如何在JavaScript中找到调用者函数?

function main()
{
   Hello();
}

function Hello()
{
  // How do you find out the caller function is 'main'?
}

有办法找到调用堆栈吗?

当前回答

使用严格模式开/关(JavaScript & TypeScript)，如果(!)调用者存在，你可以尝试这个

console.log(`caller:${(new Error()).stack?.split('\n')[2].trim().split(' ')[1]}`)

2022-06-17 08:55:27

其他回答

堆栈跟踪

您可以使用特定于浏览器的代码找到整个堆栈跟踪。好在已经有人成功了;这是GitHub上的项目代码。

但并非所有的消息都是好消息:

It is really slow to get the stack trace so be careful (read this for more). You will need to define function names for the stack trace to be legible. Because if you have code like this: var Klass = function kls() { this.Hello = function() { alert(printStackTrace().join('\n\n')); }; } new Klass().Hello(); Google Chrome will alert ... kls.Hello ( ... but most browsers will expect a function name just after the keyword function and will treat it as an anonymous function. An not even Chrome will be able to use the Klass name if you don't give the name kls to the function. And by the way, you can pass to the function printStackTrace the option {guess: true} but I didn't find any real improvement by doing that. Not all browsers give you the same information. That is, parameters, code column, etc.

调用方函数名

顺便说一下，如果你只想要调用函数的名称(在大多数浏览器中，但不是IE)，你可以使用:

arguments.callee.caller.name

但是请注意，这个名称将位于function关键字之后。我发现没有办法(甚至在谷歌Chrome上)在没有得到整个函数的代码的情况下得到更多。

调用方函数码

并总结了其他最好的答案(作者:Pablo Cabrera, nourdine和Greg Hewgill)。你可以使用的唯一跨浏览器且真正安全的东西是:

arguments.callee.caller.toString();

它将显示调用方函数的代码。遗憾的是，这对我来说还不够，这就是为什么我给你关于StackTrace和调用者函数Name的提示(尽管它们不是跨浏览器的)。

2010-09-24 16:38:24

我认为下面的代码段可能会有帮助:

window.fnPureLog = function(sStatement, anyVariable) {
    if (arguments.length < 1) { 
        throw new Error('Arguments sStatement and anyVariable are expected'); 
    }
    if (typeof sStatement !== 'string') { 
        throw new Error('The type of sStatement is not match, please use string');
    }
    var oCallStackTrack = new Error();
    console.log(oCallStackTrack.stack.replace('Error', 'Call Stack:'), '\n' + sStatement + ':', anyVariable);
}

执行以下代码:

window.fnPureLog = function(sStatement, anyVariable) {
    if (arguments.length < 1) { 
        throw new Error('Arguments sStatement and anyVariable are expected'); 
    }
    if (typeof sStatement !== 'string') { 
        throw new Error('The type of sStatement is not match, please use string');
    }
    var oCallStackTrack = new Error();
    console.log(oCallStackTrack.stack.replace('Error', 'Call Stack:'), '\n' + sStatement + ':', anyVariable);
}

function fnBsnCallStack1() {
    fnPureLog('Stock Count', 100)
}

function fnBsnCallStack2() {
    fnBsnCallStack1()
}

fnBsnCallStack2();