Command + Enter to Submit Forms

I've used Mac's for about six years now but it wasn't until I started using Tweetdeck that I realized how awesome the [COMMAND]+[ENTER] key combination was.  Inside a textarea?  No problem -- [COMMAND]+[ENTER] and the form is submitted.  What if all forms could be that way?  They can be with a little JavaScript!

The JavaScript

There are two routes to go:  adding an event listener to the form (event delegate), or applying an event listener to specific textarea elements.  The safer route is event delegation, as dynamic forms can have many textareas added at any time, but per-textarea assignments are much more efficient. Ultimately it's up to the developer to know their form.  Here are three code samples to accomplish form submission in a variety of ways:

// Assign to individual textarea (most efficient)
myTextarea.addEventListener('keydown', function(e) {
	if(e.keyCode == 13 && e.metaKey) {
		this.form.submit();
	}
});

// Form event delegation - individual form (somewhat efficient)
form.addEventListener('keydown', function(e) {
	if(!(e.keyCode == 13 && e.metaKey)) return;

	var target = e.target;
	if(target.form) {
		target.form.submit();
	}
});

// Body event delegation - any form (least efficient)
document.body.addEventListener('keydown', function(e) {
	if(!(e.keyCode == 13 && e.metaKey)) return;

	var target = e.target;
	if(target.form) {
		target.form.submit();
	}
});

Tweetdeck uses [COMMAND]+[ENTER] as does GitHub on some of their forms.  I've naturally started checking for this key command combo instead of tabbing to a field which will submit the form via traditional [ENTER] key.