循环CSS打字机效果并更改文本 [英] Loop CSS typewriter effect and change text

问题描述

我需要遍历CSS打字机效果，并为每个循环更改文本.这是我用于打字机效果的代码.我猜我需要使用javascript，但是我不确定该如何处理.关于如何执行此操作的任何想法?

I need to loop through the CSS typewriter effect, and change the text for each loop. Here is the code I'm using for the typewriter effect. I'm guessing I need to use javascript, but I am not sure how to go about this. Any ideas on how I could do this?

.typewriter h1 {
  overflow: hidden; /* Ensures the content is not revealed until the animation */
  border-right: .15em solid orange; /* The typwriter cursor */
  white-space: nowrap; /* Keeps the content on a single line */
  margin: 0 auto; /* Gives that scrolling effect as the typing happens */
  letter-spacing: .15em; /* Adjust as needed */
  animation: 
  typing 3.5s steps(40, end),
  blink-caret .75s step-end infinite;
}


body {
  background: #333;
  color: #fff;
  font-family: monospace;
  padding-top: 5em;
  display: flex;
  justify-content: center;
}

/* DEMO-SPECIFIC STYLES */
.typewriter h1 {
  overflow: hidden; /* Ensures the content is not revealed until the animation */
  border-right: .15em solid orange; /* The typwriter cursor */
  white-space: nowrap; /* Keeps the content on a single line */
  margin: 0 auto; /* Gives that scrolling effect as the typing happens */
  letter-spacing: .15em; /* Adjust as needed */
  animation: 
    typing 3.5s steps(40, end),
    blink-caret .75s step-end infinite;
}

/* The typing effect */
@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

/* The typewriter cursor effect */
@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: blue; }
}

<div class="typewriter">
  <h1>The cat and the hat.</h1>
</div>

}

推荐答案

是的，您将需要一些脚本，至少要检测动画的结束.然后，要刷新html内容，您可以存储所有要显示在数组中的消息并循环遍历.然后，您必须根据显示的文本长度来调整速度.

Yes you will need some script, at least to detect the end of the animations. Then to refresh html content,you can store all the messages to display in an array and loop through it. Then you have to adjust the speed, depending on the length of the text displayed.

var messages=["message1","message2  message2 message2","message3 message3"];
var rank=0;

// Code for Chrome, Safari and Opera
document.getElementById("myTypewriter").addEventListener("webkitAnimationEnd", changeTxt);

// Standard syntax
document.getElementById("myTypewriter").addEventListener("animationend", changeTxt);

function changeTxt(e){
  _h1 = this.getElementsByTagName("h1")[0];
  _h1.style.webkitAnimation = 'none'; // set element animation to none
   setTimeout(function() { // you surely want a delay before the next message appears
      _h1.innerHTML=messages[rank];
      var speed =3.5*messages[rank].length/20; // adjust the speed (3.5 is the original speed, 20 is the original string length
      _h1.style.webkitAnimation = 'typing '+speed+'s steps(40, end), blink-caret .75s step-end infinite'; //  switch to the original set of animation      
      (rank===messages.length-1)?rank=0:rank++; // if you have displayed the last message from the array, go back to the first one, else go to next message
    }, 1000);
}

.typewriter h1 {
  overflow: hidden; /* Ensures the content is not revealed until the animation */
  border-right: .15em solid orange; /* The typwriter cursor */
  white-space: nowrap; /* Keeps the content on a single line */
  margin: 0 auto; /* Gives that scrolling effect as the typing happens */
  letter-spacing: .15em; /* Adjust as needed */
  animation: 
  typing 3.5s steps(40, end),
  blink-caret .75s step-end infinite;
}


body {
  background: #333;
  color: #fff;
  font-family: monospace;
  padding-top: 5em;
  display: flex;
  justify-content: center;
}


/* The typing effect */
@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

/* The typewriter cursor effect */
@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: blue; }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="typewriter" id="myTypewriter">
  <h1>The cat and the hat.</h1>
</div>

还要检查不同的语法 https://www.w3schools.com/jsref/prop_style_animation.asp

这篇关于循环CSS打字机效果并更改文本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！