Question

I’m using console.log(var_name); to debug JS code in chrome and am wondering, is there a way to output to the console the line at which the current function was called?

Answer 1

You can get the stack trace with the following:

(new Error).stack;

You could then use a regular expression to filter out the line number: http://jsfiddle.net/8wA74/.

var stack = (new Error).stack.split("\n"),
    line = /:(\d+):/.exec(stack[1]); // 1 is stack depth, format is "url:line:char"

console.log("Current function was called on line " + line[1]);
// this 1 is the number of the group in regexp