When debugging complicated JavaScript one thing I find myself constantly
doing is using console.log() to print
out what functions are being called in what order. JavaScript is
single-threaded and event driven so it's often not entirely clear what
functions will be called in what order.
Traditionally I've done something like this:
function foo(bar) {
console.log('foo('+bar+')');
}
but last night I came up with something better. It's probably not
completely portable but it seems to work fine in recent Chrome / Safari /
Firefox, which is really all I'm going to be using for debugging anyway:
function logCall() {
console.log(logCall.caller.name + '(' +
Array.prototype.slice.call(logCall.caller.arguments)
.map(JSON.stringify).join(', ') +
')');
}
Just add logCall() to the start of
functions and the function call (including serialized arguments) will be
logged to the console. Easy and foolproof.