Question

For my project I’m using cached selectors to speed up, and see improvements:
(to reduce searches inside the document)

var sel1 = $('#selector1');
var sel2 = $('#selector2');

how can I use cached selectors in this situation? for ex:

$('#selector1, #selector2').fadeTo(300, 1, 'linear');

It’s just to polish up my code

Ty 🙂

Answer 1

You can use .add() to “Add elements to the set of matched elements”:

sel1.add(sel2).fadeTo(300, 1, 'linear');

Docs for .add(): http://api.jquery.com/add

.add() can take in:

• a selector
• DOM elements
• jQuery objects
• and selectors with context ($('<selector>', <context>))

You can also pass an array of DOM elements to jQuery:

var one = $('#one')[0],
    two = $('#two')[0];

$([one, two]).fadeTo(300, 1, 'linear');

Here is a demo: http://jsfiddle.net/3xJzE/

UPDATE

I created a jsperf of the three different methods that are currently answers: http://jsperf.com/jquery-fadeto-once-vs-twice (it seems like using an array selector is the fastest: $([one, two]).fadeTo...)