In my last project I needed a function in JavaScript that will execute itself as soon as it’s ready. My first idea was something like that:
// declare function function myFunction() { alert('Hello world!'); } // run it when DOM is ready with help of jQuery $(document).ready(function() { myFunction(); });
but in the back of my mind I knew there is a better way. A little bit of googling resulted in something unbelievably simple like this:
(function() { alert('Hello world!'); })();
If you need you can pass arguments as you’d normally do:
(function( arg ) { alert('Hello world! '+arg); })(9999);
Quick and simple 🙂