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
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();
日志是这样的:
Call Stack:
at window.fnPureLog (<anonymous>:8:27)
at fnBsnCallStack1 (<anonymous>:13:5)
at fnBsnCallStack2 (<anonymous>:17:5)
at <anonymous>:20:1
Stock Count: 100
其他回答
只是想让你知道，在PhoneGap/Android上，这个名字似乎不工作。但是arguments.callee.caller.toString()可以做到这一点。
在这里，除了函数名之外的所有内容都被RegExp从caller.toString()中剥离。
<!DOCTYPE html>
<meta charset="UTF-8">
<title>Show the callers name</title><!-- This validates as html5! -->
<script>
main();
function main() { Hello(); }
function Hello(){
var name = Hello.caller.toString().replace(/\s\([^#]+$|^[^\s]+\s/g,'');
name = name.replace(/\s/g,'');
if ( typeof window[name] !== 'function' )
alert ("sorry, the type of "+name+" is "+ typeof window[name]);
else
alert ("The name of the "+typeof window[name]+" that called is "+name);
}
</script>
如果你只想要函数名而不是代码，并且想要一个独立于浏览器的解决方案，请使用以下方法:
var callerFunction = arguments.callee.caller.toString().match(/function ([^\(]+)/)[1];
注意，如果数组中没有[1]元素，那么上面的代码将返回错误。要解决这个问题，请使用以下方法:
var callerFunction = (arguments.callee.caller.toString().match(/function ([^\(]+)/) === null) ? 'Document Object Model': arguments.callee.caller.toString().match(/function ([^\(]+)/)[1], arguments.callee.toString().match(/function ([^\(]+)/)[1]);
为什么上面所有的解决方案看起来都像火箭科学。同时，它不应该比这段代码更复杂。都要归功于这个家伙
如何在JavaScript中找到调用者函数?
var stackTrace = function() {
var calls = [];
var caller = arguments.callee.caller;
for (var k = 0; k < 10; k++) {
if (caller) {
calls.push(caller);
caller = caller.caller;
}
}
return calls;
};
// when I call this inside specific method I see list of references to source method, obviously, I can add toString() to each call to see only function's content
// [function(), function(data), function(res), function(l), function(a, c), x(a, b, c, d), function(c, e)]
如果你出于某种原因真的需要这个功能，希望它能跨浏览器兼容，不担心严格的东西，并且向前兼容，那么传递一个this引用:
function main()
{
Hello(this);
}
function Hello(caller)
{
// caller will be the object that called Hello. boom like that...
// you can add an undefined check code if the function Hello
// will be called without parameters from somewhere else
}
