如何在加载时隐藏动画元素? [英] How to hide animated elements on load?

问题描述

我正在将 animate.css 与

I'm using animate.css with waypoints.js in my landing page. I want to animate elements when user scrolls the page. But, the problem is that I need to hide elements before the animation starts(if i don't hide, animate.css hides element first and then animates in, that looks pretty ugly).

但是，我通过在CSS中添加两个类解决了问题，但这又带来了另一个问题.

However, I solved problem by adding two classes in my css but it creates another problem.

.visible{ opacity: 1; }
.invisible {opacity: 0; }
// I added following jquery code 
$('elem').removeClass('invisible').addClass('visible fadeInUp');

这很好，直到我将animation-delay添加到元素中为止.这是我要实现的解释.我有这样的元素:

This works good until I add animation-delay to an elements. Here is an explanation what I want to achieve. I've elements like this:

<ul>
 <li>element1</li>
 <li>element2</li>
 <li>element3</li>
</ul>

我想为每个元素添加动画延迟，以便它们在每个fadeInUp之后使用animation-delay属性在每个元素中指定的秒数.我无法使它正常工作.我尝试了以下代码，但未使用动画延迟，但未成功.

I want to add animation delay to each of the elements, so that they fadeInUp after each other with a specified seconds in each of the elements using animation-delay property. I can't get this to work. I tried following code without using animation-delay but no success.

$('elem').each(function() {
  // code with delay using timeout
  setTimeout(function(){
   $(this).removeClass('invisible').addClass('...');
  }, 100);
});

让我知道我的方法是否完全错误?如果是，那么您可以提供更好的方法来实现这一目标.

Let me know if my approach is completely wrong? If yes, then can you provide better way to accomplish.

推荐答案

您只能使用CSS做到这一点.

You can do it with only CSS.

假设您要制作标题的动画.给您的元素的类这个CSS:

Let's say you are trying to animate a title. Give your element's class this css:

.title { visibility: hidden; }

并给动画类(来自animate.css)这个CSS:

and give the animated class (which comes from the animate.css) this css:

.animated { visibility: visible !important; }

当它到达航路点视图时，它将在animate.css的代码中添加.animated，然后对于动画是可见的.

When it hits the waypoints view it will add .animated per animate.css's code and then it will be visible for the animation.

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