Is possible use a variable in jquery selector?

Question

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How to use javascript variables in jquery selectors

I have this code

var commentid=123456

var signature=($("#commentid_" + commentid).attr("data"));

but. It doesnt work... i get undefined.

If there's an element with that ID, and it has a `data` attribute, that will work. Here's a [working example](http://jsfiddle.net/jamesallardice/gU2Q9/). — James Allardice, Jan 20 '13 at 20:45

score 0 · Answer 1 · answered Jan 20 '13 at 20:51

0

solved with..

$(window).load(function(){
[code]
}

answered Jan 20 '13 at 20:51

fpilee

3

Don't use `.load` on `window` when there's a perfectly good DOM-ready event provided by jQuery. Use `$(document).ready(function () { ... });` or shorthand `$(function () { ... });`. – James Allardice Jan 20 '13 at 20:53
where i can read about (function(){...})() ? – fpilee Jan 20 '13 at 21:17
It's in the [docs for the `.ready()` method](http://api.jquery.com/ready/). – James Allardice Jan 20 '13 at 21:18
yes. But there is a (function(){})() in pure javascript. Is there a doc for this to? – fpilee Jan 20 '13 at 22:33
That's completely different. The jQuery shorthand `.ready` call is `$(function () {});`. Notice the `$`, and the lack of invoking parentheses. – James Allardice Jan 21 '13 at 07:41

1 Answers1