Javascript Shorthand for getElementById
Is there any shorthand for the JavaScript document.getElementById? Or is there any way I can define one? It gets repetitive retyping that over and over.
Solution 1:
var $ = function( id ) { return document.getElementById( id ); };
$( 'someID' )
Here I used $
, but you can use any valid variable name.
var byId = function( id ) { return document.getElementById( id ); };
byId( 'someID' )
Solution 2:
To save an extra character you could pollute the String prototype like this:
pollutePrototype(String, '绎', {
configurable: false, // others must fail
get: function() {
return document.getElementById(this);
},
set: function(element) {
element.id = this;
}
});
function pollutePrototype(buildIn, name, descr) {
var oldDescr = Object.getOwnPropertyDescriptor(buildIn.prototype, name);
if (oldDescr && !oldDescr.configurable) {
console.error('Unable to replace ' + buildIn.name + '.prototype.' + name + '!');
} else {
if (oldDescr) {
console.warn('Replacing ' + buildIn.name + '.prototype.' + name + ' might cause unexpected behaviour.');
}
Object.defineProperty(buildIn.prototype, name, descr);
}
}
It works in some browsers and you can access elements this way:
document.body.appendChild(
'footer'.绎 = document.createElement('div')
);
'footer'.绎.textContent = 'btw nice browser :)';
I have chosen the name of the property almost randomly. If you actually wanted to use this shorthand I would suggest coming up with something easier to type.
Solution 3:
You can easily create shorthand easily yourself:
function getE(id){
return document.getElementById(id);
}