How to Get the Current URL using JavaScript?

How to get currently running function name using JavaScript ?

Last Updated : 17 Dec, 2019

Given a function and the task is to get the name of function that is currently running using JavaScript.

Approach 1: Using arguments.callee method: It refers to the currently executing function inside the function body of that function. In this method, we use arguments.callee to refer to the name of the function. So we define a new variable as arguments.callee.toString(). Then we use (variable_name).substr to get the function and then we display it as an alert. Syntax:

arguments.callee.toString()

You may have to parse the name though, as it will probably include some extra junk. Example 1: This example display currently running function using arguments.callee method.

javascript

<!DOCTYPE HTML>
<html> 

<head> 
    <title> 
        How to get currently running
        function name using JavaScript ?
    </title> 
</head> 
    
<body style = "text-align:center;"> 
            
    <h1 style = "color:green;" > 
        GeeksForGeeks 
    </h1> 
        
    <script> 
        function GFGs() {
            var me = arguments.callee.toString();
            me = me.substr('function '.length);     
            me = me.substr(0, me.indexOf('('));     
            alert(me);
        }
        GFGs();         
    </script> 
</body> 

</html>

Output:

Approach 2: With the help of console.log method, we define a new function which returns the name of the function and call it the present function. Syntax:

function getFuncName() {
    return getFuncName.caller.name
}
function teddy() { 
    console.log(getFuncName())
}
teddy()

Example 2: This example display currently running function using console.log method.

javascript

<!DOCTYPE html>
<html> 

<head>
    <title> 
        How to get currently running
        function name using JavaScript ?
    </title> 
</head> 
    
<body style = "text-align:center;"> 
            
    <h1 style = "color:green;" > 
        GeeksForGeeks 
    </h1> 
        
    <script> 
        function getFuncName() {
            return getFuncName.caller.name
        }
        
        function teddy() { 
            console.log(getFuncName())
        }
        teddy()     
    </script> 
</body> 

</html>

Output:

How to Get the Current URL using JavaScript?

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