使用CSS对页面加载的淡入效果 [英] Using CSS for fade-in effect on page load

问题描述

可以使用CSS Transitions来允许文本段落在页面加载时淡入？

Can CSS Transitions be used to allow a text paragraph to fade-in on page load?

我真的很喜欢它在 http://dotmailapp.com/ ，并且希望使用类似的效果CSS

I really like how it looks on http://dotmailapp.com/ and would love to use a similar effect using CSS.

注意：此域名已被购买，不再具有上述效果。您可以在查看存档的副本 。

Note: The domain has since been purchased and no longer has the effect mentioned. An archived copy can be viewed on the Wayback Machine.

有这个标记：

<div id="test">    
    <p>​This is a test</p>
</div>​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

使用以下CSS规则：

#test p {
    opacity: 0;
    margin-top: 25px;
    font-size: 21px;
    text-align: center;
    -webkit-transition: opacity 2s ease-in;
    -moz-transition: opacity 2s ease-in;
    -o-transition: opacity 2s ease-in;
    -ms-transition: opacity 2s ease-in;
    transition: opacity 2s ease-in;
}​

如何在加载时触发转换？

How can the transition be triggered on load?

推荐答案

方法1：

如果您正在寻找一个自我调用的转换，使用 CSS3动画，但它们不受支持，但此

Method 1:

If you are looking for a self-invoking transition then you should use CSS3 Animations, they aren't supported as well but this is exactly the kind of thing they were made for.

#test p {
    margin-top: 25px;
    font-size: 21px;
    text-align: center;

    -webkit-animation: fadein 2s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadein 2s; /* Firefox < 16 */
        -ms-animation: fadein 2s; /* Internet Explorer */
         -o-animation: fadein 2s; /* Opera < 12.1 */
            animation: fadein 2s;
}

@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

演示

• http://jsfiddle.net/SO_AMK/VV2ek/ li>
  

  Demo

  • http://jsfiddle.net/SO_AMK/VV2ek/

  所有现代浏览器，IE 10+： http://caniuse.com/#feat=css-animation

  All modern browsers, IE 10+: http://caniuse.com/#feat=css-animation

  
  

  或者，您可以使用jQuery plain JS，见第三个代码块）在负载上更改类：

  Alternatively, you can use jQuery (or plain JS, see third code block) to change the class on load:

  $("#test p").addClass("load");​
  

  $ b b
  

  CSS

  
  
  

  CSS

  #test p {
      opacity: 0;
      font-size: 21px;
      margin-top: 25px;
      text-align: center;
  
      -webkit-transition: opacity 2s ease-in;
         -moz-transition: opacity 2s ease-in;
          -ms-transition: opacity 2s ease-in;
           -o-transition: opacity 2s ease-in;
              transition: opacity 2s ease-in;
  }
  
  #test p.load {
      opacity: 1;
  }
  

  
  
  

  Plain JS（不在演示中）

  
  
  

  Plain JS (not in demo)

  document.getElementById("test").children[0].className += " load";
  

  
  
  

  演示

  
  
  
  
  
  • http://jsfiddle.net/SO_AMK/a9dnW/
  
  

  Demo

  • http://jsfiddle.net/SO_AMK/a9dnW/

  所有现代浏览器，IE 10+： http://caniuse.com/#feat=css-transitions

  All modern browsers, IE 10+: http://caniuse.com/#feat=css-transitions

  
  

  或者，您可以使用 .Mail 使用：

  Or, you can use the method that .Mail uses:

  $("#test p").delay(1000).animate({ opacity: 1 }, 700);​
  

  
  
  

  CSS

  
  
  

  CSS

  #test p {
      opacity: 0;
      font-size: 21px;
      margin-top: 25px;
      text-align: center;
  }
  

  
  
  

  演示

  
  
  
  
  
  • http://jsfiddle.net/SO_AMK/a9dnW/3/
  
  

  Demo

  • http://jsfiddle.net/SO_AMK/a9dnW/3/

  jQuery 1.x ：所有现代浏览器，IE 6+： http://jquery.com/browser-support/
  
  
  jQuery 2.x ：所有现代浏览器，IE 9+： http://jquery.com/browser-support/

  jQuery 1.x: All modern browsers, IE 6+: http://jquery.com/browser-support/
  jQuery 2.x: All modern browsers, IE 9+: http://jquery.com/browser-support/

  此方法与目标浏览器最兼容不需要支持CSS3转换或动画。

  This method is the most cross-compatible as the target browser does not need to support CSS3 transitions or animations.

  这篇关于使用CSS对页面加载的淡入效果的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！