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动态单词交换动画

发布于 2024-12-01 21:08:16 字数 179 浏览 0 评论 0原文

我正在尝试为页面上的文本创建一个动画，每隔几秒钟，就会用列表中的另一个单词更改一个单词。示例：我有一个标题，上面写着“这很酷”，但我希望每隔几秒将“酷”替换为“neat/awesome/groovy/etc”。

老实说，我不确定解决这个问题的最佳方法（就使用什么技术而言），而且我找不到适用于现代浏览器的代码简介。非常感谢帮助！

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橘和柠 2024-12-08 21:08:16

在纯JS

http://jsfiddle.net/M5gxH/3/

<script>
var words = ["neat", "great", "best", "groovy"];
var i = 0;
var text = "This is cool";
function _getChangedText() {
    i = (i + 1) % words.length;
    console.log(words[i]);
    return text.replace(/cool/, words[i]);
}
function _changeText() {
    var txt = _getChangedText();
    console.log(txt);
    $("#changer").text(txt);
}
setInterval("_changeText()", 1000);
</script>
<span id="changer">This is cool</span>

in Pure JS

http://jsfiddle.net/M5gxH/3/

<script>
var words = ["neat", "great", "best", "groovy"];
var i = 0;
var text = "This is cool";
function _getChangedText() {
    i = (i + 1) % words.length;
    console.log(words[i]);
    return text.replace(/cool/, words[i]);
}
function _changeText() {
    var txt = _getChangedText();
    console.log(txt);
    $("#changer").text(txt);
}
setInterval("_changeText()", 1000);
</script>
<span id="changer">This is cool</span>

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╄→承喏 2024-12-08 21:08:16

在 jQuery 中，我会做这样的事情：

http://jsfiddle.net/6SRaB/1/

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() { // on document load
    changer();
});

function changer() {
    var words = ["nifty","groovy","far out"]; // add as many as you like
    var idx = Math.floor(words.length * Math.random());  // randomizer
    $('#change').text(words[idx]); // replaces the contents of "change"
    var time = Math.floor(5000 * Math.random() + 3000);  // in milliseconds
    setTimeout(changer,time);  // lather, rinse, repeat
}
</script>
...
<h2>This is <span id="change">cool</span></h2>

关键是使用带有 ID 的 SPAN 标签，您可以快速挑选出来。

In jQuery, I'd do something like this:

http://jsfiddle.net/6SRaB/1/

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() { // on document load
    changer();
});

function changer() {
    var words = ["nifty","groovy","far out"]; // add as many as you like
    var idx = Math.floor(words.length * Math.random());  // randomizer
    $('#change').text(words[idx]); // replaces the contents of "change"
    var time = Math.floor(5000 * Math.random() + 3000);  // in milliseconds
    setTimeout(changer,time);  // lather, rinse, repeat
}
</script>
...
<h2>This is <span id="change">cool</span></h2>

The key is to use a SPAN tag with an ID that you can pick out quickly.

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野の 2024-12-08 21:08:16

这个问题很老了，但它出现在我的谷歌搜索中。在 2018 年，您可以使用 CSS 动画轻松实现此行为，而无需任何额外的 JavaScript 代码。

以下内容应该可以满足您的需求：

<!DOCTYPE html>
<html>
  <head>
    <style>
      .animated{
        display: inline;
        text-indent: 8px;
      }

      .animated span{
        animation: topToBottom 12.5s linear infinite 0s;
        -ms-animation: topToBottom 12.5s linear infinite 0s;
        -webkit-animation: topToBottom 12.5s linear infinite 0s;
        color: red;
        opacity: 0;
        overflow: hidden;
        position: absolute;
      }

      .animated span:nth-child(2){
        animation-delay: 2.5s;
        -ms-animation-delay: 2.5s;
        -webkit-animation-delay: 2.5s;
      }

      .animated span:nth-child(3){
        animation-delay: 5s;
        -ms-animation-delay: 5s;
        -webkit-animation-delay: 5s;
      }

      .animated span:nth-child(4){
        animation-delay: 7.5s;
        -ms-animation-delay: 7.5s;
        -webkit-animation-delay: 7.5s;
      }

      .animated span:nth-child(5){
        animation-delay: 10s;
        -ms-animation-delay: 10s;
        -webkit-animation-delay: 10s;
      }

      @-moz-keyframes topToBottom{
        0% { opacity: 0; }
        5% { opacity: 0; -moz-transform: translateY(-50px); }
        10% { opacity: 1; -moz-transform: translateY(0px); }
        25% { opacity: 1; -moz-transform: translateY(0px); }
        30% { opacity: 0; -moz-transform: translateY(50px); }
        80% { opacity: 0; }
        100% { opacity: 0; }
      }
      @-webkit-keyframes topToBottom{
        0% { opacity: 0; }
        5% { opacity: 0; -webkit-transform: translateY(-50px); }
        10% { opacity: 1; -webkit-transform: translateY(0px); }
        25% { opacity: 1; -webkit-transform: translateY(0px); }
        30% { opacity: 0; -webkit-transform: translateY(50px); }
        80% { opacity: 0; }
        100% { opacity: 0; }
      }
      @-ms-keyframes topToBottom{
        0% { opacity: 0; }
        5% { opacity: 0; -ms-transform: translateY(-50px); }
        10% { opacity: 1; -ms-transform: translateY(0px); }
        25% { opacity: 1; -ms-transform: translateY(0px); }
        30% { opacity: 0; -ms-transform: translateY(50px); }
        80% { opacity: 0; }
        100% { opacity: 0; }
      }
    </style>
  </head>

  <body>
    <h2>CSS Animations are
      <div class="animated">
        <span>cool.</span>
        <span>neat.</span>
        <span>awesome.</span>
        <span>groovy.</span>
        <span>magic.</span>
      </div>
    </h2>
  </body>
</html>

请注意，这只是一个垂直滑动的示例。 CSS 在动画/过渡方面基本上有无限的可能性。

This question is quite old but it showed up in a google search for me. In 2018 you can easily implement this behavior with CSS Animations without the need for any additional JavaScript code.

The following should give you what you need:

<!DOCTYPE html>
<html>
  <head>
    <style>
      .animated{
        display: inline;
        text-indent: 8px;
      }

      .animated span{
        animation: topToBottom 12.5s linear infinite 0s;
        -ms-animation: topToBottom 12.5s linear infinite 0s;
        -webkit-animation: topToBottom 12.5s linear infinite 0s;
        color: red;
        opacity: 0;
        overflow: hidden;
        position: absolute;
      }

      .animated span:nth-child(2){
        animation-delay: 2.5s;
        -ms-animation-delay: 2.5s;
        -webkit-animation-delay: 2.5s;
      }

      .animated span:nth-child(3){
        animation-delay: 5s;
        -ms-animation-delay: 5s;
        -webkit-animation-delay: 5s;
      }

      .animated span:nth-child(4){
        animation-delay: 7.5s;
        -ms-animation-delay: 7.5s;
        -webkit-animation-delay: 7.5s;
      }

      .animated span:nth-child(5){
        animation-delay: 10s;
        -ms-animation-delay: 10s;
        -webkit-animation-delay: 10s;
      }

      @-moz-keyframes topToBottom{
        0% { opacity: 0; }
        5% { opacity: 0; -moz-transform: translateY(-50px); }
        10% { opacity: 1; -moz-transform: translateY(0px); }
        25% { opacity: 1; -moz-transform: translateY(0px); }
        30% { opacity: 0; -moz-transform: translateY(50px); }
        80% { opacity: 0; }
        100% { opacity: 0; }
      }
      @-webkit-keyframes topToBottom{
        0% { opacity: 0; }
        5% { opacity: 0; -webkit-transform: translateY(-50px); }
        10% { opacity: 1; -webkit-transform: translateY(0px); }
        25% { opacity: 1; -webkit-transform: translateY(0px); }
        30% { opacity: 0; -webkit-transform: translateY(50px); }
        80% { opacity: 0; }
        100% { opacity: 0; }
      }
      @-ms-keyframes topToBottom{
        0% { opacity: 0; }
        5% { opacity: 0; -ms-transform: translateY(-50px); }
        10% { opacity: 1; -ms-transform: translateY(0px); }
        25% { opacity: 1; -ms-transform: translateY(0px); }
        30% { opacity: 0; -ms-transform: translateY(50px); }
        80% { opacity: 0; }
        100% { opacity: 0; }
      }
    </style>
  </head>

  <body>
    <h2>CSS Animations are
      <div class="animated">
        <span>cool.</span>
        <span>neat.</span>
        <span>awesome.</span>
        <span>groovy.</span>
        <span>magic.</span>
      </div>
    </h2>
  </body>
</html>

Note that this is just an example with vertical sliding. There are basically endless possibilities with CSS in terms of animations/transitions.

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