jQuery backgroundColor动画 [英] jQuery backgroundColor animation

问题描述

我有一个带链接和SPAN的DIV.

I have a DIV with a link and a SPAN.

单击链接时，它将使用AJAX呈现项目列表.单击一个项目后，SPAN的内容就会更改.

When clicking the link, it renders a list of items by using AJAX. When an item is clicked, the content of the SPAN is changed.

我想通过将DIV的背景色设置为绿色，然后使用jQuery将其动画化为白色来突出显示此更改.

I want to highlight this change, by setting the background-color of the DIV to green, and animating it back to white using jQuery.

  var originalColor = elementToUpdate.parentNode.style.backgroundColor;
  elementToUpdate.style.backgroundColor = 'green'; //lastSender.style.color;
  jQuery(elementToUpdate.id).animate({ backgroundColor: '#ffffff' }, 1000);

SPAN的背景在第二行更改为绿色，但第三行不执行任何操作.没有错误，也没有改变...

The background of the SPAN is changed to green on the 2nd line, but the 3rd line doesn't do anything. No errors, or changes what so ever...

有什么想法吗?

编辑:如Ted Naleid在以下评论中所述:

As noted by Ted Naleid in a comment below:

还请注意，您必须拥有 为安装了彩色动画插件 这个工作 ( http://plugins.jquery.com/project/color )， 如果您尚未安装，则使用jQuery 不能为颜色设置动画，只能是数字 属性(至少从1.3.1开始).

Also note that you have to have the color animations plugin installed for this to work (http://plugins.jquery.com/project/color), if you don't have it installed, jQuery can't animate colors, only numeric properties (at least as of 1.3.1).

推荐答案

如果已有元素，则不需要.id.将其直接传递给jQuery:

You don't need the .id if you already have the element. Hand it directly to jQuery:

jQuery(elementToUpdate).animate({ backgroundColor: '#ffffff' }, 1000);

您不会收到错误，因为elementToUpdate.id是一个字符串，jQuery(可能)将其解释为选择器.它只是碰巧没有选择任何东西的选择器.

You don't get an error because elementToUpdate.id is a string, which jQuery (probably) interprets as a selector. It just happens to be a selector that doesn't select anything.

或者，您可以这样说来使其成为有效的选择器:

Alternatively, you can say this to make it a valid selector:

jQuery('#' + elementToUpdate.id).animate({ backgroundColor: '#ffffff' }, 1000);

但是我认为第一种形式是可取的，因为您已经有了元素本身.

But I think the first form is preferable since you already have the element itself.

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