How Can I Retrieve Information About JavaScript Caller Functions?

JavaScript Caller Information

In JavaScript, it is possible to obtain details about the function calling another function.

Caller Function Name

You have already mentioned the approach for retrieving the caller function name:

var callerFunc = arguments.callee.caller.toString();
callerFuncName = (callerFunc.substring(callerFunc.indexOf("function") + 8, callerFunc.indexOf("(")) || "anoynmous")

Caller Line Number

To extract the line number from which the method was called, you can utilize the Error object:

function getErrorObject(){
    try { throw Error('') } catch(err) { return err; }
}

var err = getErrorObject();
var caller_line = err.stack.split("\n")[4];
var index = caller_line.indexOf("at ");
var clean = caller_line.slice(index+2, caller_line.length);

In this code, the getErrorObject function generates an error object. By accessing the stack property, you can retrieve a stack trace, which contains information about the current calling context.

Caller File Source URL

Unfortunately, directly obtaining the JavaScript file source URL from which the method was called is not possible in most JavaScript implementations.

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