What is a practical use for a closure in JavaScript?
- by alex
I'm trying my hardest to wrap my head around JavaScript's closures.
I get that by returning an inner function, it will have access to any variable defined in it's immediate parent.
Where would this be useful to me? Perhaps I haven't quite got my head around it yet. Most of the examples I have seen online don't provide any real world code, just vague examples.
Can someone show me a real world use of a closure?
Is this one, for example?
var warnUser = function (msg) {
var calledCount = 0;
return function() {
calledCount++;
alert(msg + '\nYou have been warned ' + calledCount + ' times.');
};
};
var warnForTamper = warnUser('You can not tamper with our HTML.');
warnForTamper();
warnForTamper();
Thanks
