Custom console log function, a console.log wrapper

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function log( msgOrObj ){
    if(dev_mode){
        console.log({
            'message': msgOrObj,
            'caller': arguments.callee.caller.toString()
        });
    }
}

So, I have attempted to write a simple custom console log function (as above). However I am struggling to find which file and line the caller came from. The most I can see is the function that called it.

Has anyone done anything similar? Or is this even possible?

example used in somescript.js from line 70:

log('some very important message!')
debug-backtrace javascript
7 Answers

I use this in Node and its particularly effective. Console.log is just a function it can be reassigned as well as stored for safe keeping and returned back after we are done. I've no reason to believe this would not work in a browser too.

//Store console.log function in an object so
//we can still use it.
theConsole = {};
theConsole.log = console.log;

//This function is called when console.log occurs
//arguments[0] is what would normally be printed.
console.log = function(){
    theConsole.log(">" + arguments[0]);
}

//Call our console.log wrapper
console.log("Testing testing 123");
console.log("Check one two");

//Put back the way it was
console.log = theConsole.log;
console.log("Now normal");
user_9666560

It seems you all are struggling too much. I have a simple one-line solution:-

//Just do this, that I have done below: HAVE FUN


var log=console.log;

log(`So this way is known as Aniket's way.`);
log(`Don't be too serious this is just the fun way of doing same thing`);

log(`Thank You`)

user_144284690
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