Can not removeClass in jQuery

The loading class is added but it doesn't removed. How to fix this ?

$(".phones").addClass("loading");
    that = this
    setTimeout(function() {
    开发者_JAVA技巧    $(that).removeClass('loading');
    }, 3000);

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Something like this would work:

var phones = $(".phones").addClass("loading");
setTimeout(function() {
    phones.removeClass('loading');
}, 3000);

I'm not sure why you're worried about scope, though.

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Are you trying to do:

$(".phones").addClass("loading");
setTimeout(function() {
    $(".phones").removeClass('loading');
}, 3000);

that = this, which refers to the window object if there is no smaller enclosing scope.

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that=this has nothing to do with $(".phones") as your indentation hints at.

var phones = $(".phones").addClass("loading");
setTimeout(function() {
    phones.removeClass('loading');
}, 3000);

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The problem here is that you are adding the class to a group of elements defined by the class selector .phones but your removing it from a single element defined by the saved item that. It seems like you want to add and remove from the same group. To do this just use the same queries

$(".phones").addClass("loading");    
setTimeout(function() {
  $(".phones").removeClass('loading');
}, 3000);

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Change that = this to that = $(this);, Not tested but believe this would help