CODEWITHSUNDEEP
jquery
Tarida George
Tarida George

Reputation: 1303

What's the purpose of passing an empty object to jQuery?

What does $({}) in jQuery mean ? I saw this on victmo response on this question : Possible to fade out div border?

He used $({alpha:1}).animate({alpha:0}) how this is affecting the DOM and what happens literally?

Upvotes: 5

Views: 121

Answers (1)

Felix Kling
Felix Kling

Reputation: 816910

What does $({ }) in jQuery mean ?

It means "pass an empty object to jQuery and create a jQuery object from it".

how this is affecting the DOM and what happens literally?

It doesn't affect the DOM at all, it simply changes the property value of the object {alpha:1} over time.

You can use some jQuery methods on plain objects as explained in the documentation. Although it seems to be a bit outdated since animate is not listed there. But it works indeed:

> $({alpha:1}).animate({alpha:0}, {step: function() { console.log(this.alpha); }})
1
0.9965342284774632
0.9870866934849247
0.9730426794137726
0.9524135262330098
0.9242551074907518
0.8926584654403724
0.8563192594626027
...

Upvotes: 6

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