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?
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
概括一下(并说得更清楚)…
这段代码:
function Hello() {
alert("caller is " + arguments.callee.caller.toString());
}
等价于:
function Hello() {
alert("caller is " + Hello.caller.toString());
}
显然,第一部分更容易移植,因为你可以改变函数的名字,从“Hello”说成“Ciao”,但仍然可以让整个程序正常工作。
在后一种情况下,如果你决定重构被调用函数的名称(Hello),你将不得不改变它的所有出现:
其他回答
只需控制台日志错误堆栈。这样你就可以知道你是如何被召唤的
Const hello = () => { console.log(新的错误('I was called').stack) } Const sello = () => { 你好() } 你可以()
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)]
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
下面是一个函数来获得完整的stacktrace:
function stacktrace() {
var f = stacktrace;
var stack = 'Stack trace:';
while (f) {
stack += '\n' + f.name;
f = f.caller;
}
return stack;
}
你可以使用调试器;在功能上。 打开inspect元素和watch调用堆栈;