So you frequently use print_r for debugging your php codes? are you in need of equivalent function in javascript? Yes i was and you might be too. It is really hard to debug the code without print_r functionality. Below is the code that you can use to make something equivalent in javascript aswell.

function dump(arr,level) {
		var dumped_text = "";
		if(!level) level = 0;

		//The padding given at the beginning of the line.
		var level_padding = "";
		for(var j=0;j<level+1;j++) level_padding += "    ";

		if(typeof(arr) == 'object') { //Array/Hashes/Objects
			for(var item in arr) {
				var value = arr[item];

				if(typeof(value) == 'object') { //If it is an array,
					dumped_text += level_padding + "'" + item + "' ...\n";
					dumped_text += dump(value,level+1);
				} else {
					dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
				}
			}
		} else { //Stings/Chars/Numbers etc.
			dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
		}
		return dumped_text;
	}

Place this function in your js code at top then to debug any variable object or array use this

alert(dump(variable));

That’s it I hope you find it useful coz it has really helped me a lot in my daily development works.