Check opacity by jQuery

How 开发者_StackOverflowdo I check if the opacity of an element is 0, and then do something in jQuery?

Have you tried using .css()?

if($('elemFoo').css('opacity') == 0) {
    doSomething();
}

You can do as

$(function() {

    if ($('#foo').css('opacity') == 0)
        alert('lol');

});

Demo : http://jsfiddle.net/9GEZ5/

if( $("#id_of_your_thing").css('opacity') == "0" )
  do_stuffs();

var currentOpacity = jQuery.fx.step.opacity

if(currentOpacity == 0)
{
   ...

To find opacity you do

var x = $('#test').css('opacity');
x==0 ? alert('opacity is 0') : alert('Opacity is not 0');

Check working example at http://jsfiddle.net/SCHNc/1/

jquery.support.opacity

on jQuery 1.7.1 seems to work