打字效果动画的4种实现方法(超简单)

方法一(纯css实现)：

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html代码：

打字动画打字动画打字动画

css样式：

.typing{
 font-size: 1rem;
 padding-top: 6%;
 margin-bottom: 5%;
 font-weight: normal;
 letter-spacing: .3rem;
 -webkit-animation: type 2s steps(50, end) forwards;
 animation: type 2s steps(50, end) forwards;
}
.typing-item{
 text-align: center;
 color: black;
 width:100%;
 white-space:nowrap;
 overflow:hidden;
}
@-webkit-keyframes type{
 from { width: 0;}
}

@keyframes type{
 from { width: 0;}
}

缺点：只能实现一行式的打字效果，无法打出一段落文字

方法二（jquery）:

html代码：

jquery代码：

方法三（jquery-typed插件）:

html代码：

引入Typed.js，Typed.js内容如下

// The MIT License (MIT)

// Typed.js | Copyright (c) 2014 Matt Boldt | www.mattboldt.com

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.




! function($) {

 "use strict";

 var Typed = function(el, options) {

  // chosen element to manipulate text
  this.el = $(el);

  // options
  this.options = $.extend({}, $.fn.typed.defaults, options);

  // attribute to type into
  this.isInput = this.el.is('input');
  this.attr = this.options.attr;

  // show cursor
  this.showCursor = this.isInput ? false : this.options.showCursor;

  // text content of element
  this.elContent = this.attr ? this.el.attr(this.attr) : this.el.text()

  // html or plain text
  this.contentType = this.options.contentType;

  // typing speed
  this.typeSpeed = this.options.typeSpeed;

  // add a delay before typing starts
  this.startDelay = this.options.startDelay;

  // backspacing speed
  this.backSpeed = this.options.backSpeed;

  // amount of time to wait before backspacing
  this.backDelay = this.options.backDelay;

  // input strings of text
  this.strings = this.options.strings;

  // character number position of current string
  this.strPos = 0;

  // current array position
  this.arrayPos = 0;

  // number to stop backspacing on.
  // default 0, can change depending on how many chars
  // you want to remove at the time
  this.stopNum = 0;

  // Looping logic
  this.loop = this.options.loop;
  this.loopCount = this.options.loopCount;
  this.curLoop = 0;

  // for stopping
  this.stop = false;

  // custom cursor
  this.cursorChar = this.options.cursorChar;

  // shuffle the strings
  this.shuffle = this.options.shuffle;
  // the order of strings
  this.sequence = [];

  // All systems go!
  this.build();
 };

 Typed.prototype = {

  constructor: Typed

  ,
  init: function() {
   // begin the loop w/ first current string (global self.string)
   // current string will be passed as an argument each time after this
   var self = this;
   self.timeout = setTimeout(function() {
    for (var i=0;i" + this.cursorChar + "");
    this.el.after(this.cursor);
   }
   this.init();
  }

  // pass current string state to each function, types 1 char per call
  ,
  typewrite: function(curString, curStrPos) {
   // exit when stopped
   if (this.stop === true) {
    return;
   }

   // varying values for setTimeout during typing
   // can't be global since number changes each time loop is executed
   var humanize = Math.round(Math.random() * (100 - 30)) + this.typeSpeed;
   var self = this;

   // ------------- optional ------------- //
   // backpaces a certain string faster
   // ------------------------------------ //
   // if (self.arrayPos == 1){
   // self.backDelay = 50;
   // }
   // else{ self.backDelay = 500; }

   // contain typing function in a timeout humanize'd delay
   self.timeout = setTimeout(function() {
    // check for an escape character before a pause value
    // format: \^\d+ .. eg: ^1000 .. should be able to print the ^ too using ^^
    // single ^ are removed from string
    var charPause = 0;
    var substr = curString.substr(curStrPos);
    if (substr.charAt(0) === '^') {
     var skip = 1; // skip atleast 1
     if (/^\^\d+/.test(substr)) {
      substr = /\d+/.exec(substr)[0];
      skip += substr.length;
      charPause = parseInt(substr);
     }

     // strip out the escape character and pause value so they're not printed
     curString = curString.substring(0, curStrPos) + curString.substring(curStrPos + skip);
    }

    if (self.contentType === 'html') {
     // skip over html tags while typing
     var curChar = curString.substr(curStrPos).charAt(0)
     if (curChar === '<' || curChar === '&') {
      var tag = '';
      var endTag = '';
      if (curChar === '<') {
       endTag = '>'
      } else {
       endTag = ';'
      }
      while (curString.substr(curStrPos).charAt(0) !== endTag) {
       tag += curString.substr(curStrPos).charAt(0);
       curStrPos++;
      }
      curStrPos++;
      tag += endTag;
     }
    }

    // timeout for any pause after a character
    self.timeout = setTimeout(function() {
     if (curStrPos === curString.length) {
      // fires callback function
      self.options.onStringTyped(self.arrayPos);

      // is this the final string
      if (self.arrayPos === self.strings.length - 1) {
       // animation that occurs on the last typed string
       self.options.callback();

       self.curLoop++;

       // quit if we wont loop back
       if (self.loop === false || self.curLoop === self.loopCount)
        return;
      }

      self.timeout = setTimeout(function() {
       self.backspace(curString, curStrPos);
      }, self.backDelay);
     } else {

      /* call before functions if applicable */
      if (curStrPos === 0)
       self.options.preStringTyped(self.arrayPos);

      // start typing each new char into existing string
      // curString: arg, self.el.html: original text inside element
      var nextString = curString.substr(0, curStrPos + 1);
      if (self.attr) {
       self.el.attr(self.attr, nextString);
      } else {
       if (self.isInput) {
        self.el.val(nextString);
       } else if (self.contentType === 'html') {
        self.el.html(nextString);
       } else {
        self.el.text(nextString);
       }
      }

      // add characters one by one
      curStrPos++;
      // loop the function
      self.typewrite(curString, curStrPos);
     }
     // end of character pause
    }, charPause);

    // humanized value for typing
   }, humanize);

  }

  ,
  backspace: function(curString, curStrPos) {
   // exit when stopped
   if (this.stop === true) {
    return;
   }

   // varying values for setTimeout during typing
   // can't be global since number changes each time loop is executed
   var humanize = Math.round(Math.random() * (100 - 30)) + this.backSpeed;
   var self = this;

   self.timeout = setTimeout(function() {

    // ----- this part is optional ----- //
    // check string array position
    // on the first string, only delete one word
    // the stopNum actually represents the amount of chars to
    // keep in the current string. In my case it's 14.
    // if (self.arrayPos == 1){
    // self.stopNum = 14;
    // }
    //every other time, delete the whole typed string
    // else{
    // self.stopNum = 0;
    // }

    if (self.contentType === 'html') {
     // skip over html tags while backspacing
     if (curString.substr(curStrPos).charAt(0) === '>') {
      var tag = '';
      while (curString.substr(curStrPos).charAt(0) !== '<') {
       tag -= curString.substr(curStrPos).charAt(0);
       curStrPos--;
      }
      curStrPos--;
      tag += '<';
     }
    }

    // ----- continue important stuff ----- //
    // replace text with base text + typed characters
    var nextString = curString.substr(0, curStrPos);
    if (self.attr) {
     self.el.attr(self.attr, nextString);
    } else {
     if (self.isInput) {
      self.el.val(nextString);
     } else if (self.contentType === 'html') {
      self.el.html(nextString);
     } else {
      self.el.text(nextString);
     }
    }

    // if the number (id of character in current string) is
    // less than the stop number, keep going
    if (curStrPos > self.stopNum) {
     // subtract characters one by one
     curStrPos--;
     // loop the function
     self.backspace(curString, curStrPos);
    }
    // if the stop number has been reached, increase
    // array position to next string
    else if (curStrPos <= self.stopNum) {
     self.arrayPos++;

     if (self.arrayPos === self.strings.length) {
      self.arrayPos = 0;

      // Shuffle sequence again
      if(self.shuffle) self.sequence = self.shuffleArray(self.sequence);

      self.init();
     } else
      self.typewrite(self.strings[self.sequence[self.arrayPos]], curStrPos);
    }

    // humanized value for typing
   }, humanize);

  }
  /**
   * Shuffles the numbers in the given array.
   * @param {Array} array
   * @returns {Array}
   */
  ,shuffleArray: function(array) {
   var tmp, current, top = array.length;
   if(top) while(--top) {
    current = Math.floor(Math.random() * (top + 1));
    tmp = array[current];
    array[current] = array[top];
    array[top] = tmp;
   }
   return array;
  }

  // Start & Stop currently not working

  // , stop: function() {
  //  var self = this;

  //  self.stop = true;
  //  clearInterval(self.timeout);
  // }

  // , start: function() {
  //  var self = this;
  //  if(self.stop === false)
  //  return;

  //  this.stop = false;
  //  this.init();
  // }

  // Reset and rebuild the element
  ,
  reset: function() {
   var self = this;
   clearInterval(self.timeout);
   var id = this.el.attr('id');
   this.el.after('')
   this.el.remove();
   if (typeof this.cursor !== 'undefined') {
    this.cursor.remove();
   }
   // Send the callback
   self.options.resetCallback();
  }

 };

 $.fn.typed = function(option) {
  return this.each(function() {
   var $this = $(this),
    data = $this.data('typed'),
    options = typeof option == 'object' && option;
   if (!data) $this.data('typed', (data = new Typed(this, options)));
   if (typeof option == 'string') data[option]();
  });
 };

 $.fn.typed.defaults = {
  strings: ["These are the default values...", "You know what you should do?", "Use your own!", "Have a great day!"],
  // typing speed
  typeSpeed: 0,
  // time before typing starts
  startDelay: 0,
  // backspacing speed
  backSpeed: 0,
  // shuffle the strings
  shuffle: false,
  // time before backspacing
  backDelay: 500,
  // loop
  loop: false,
  // false = infinite
  loopCount: false,
  // show cursor
  showCursor: true,
  // character for cursor
  cursorChar: "|",
  // attribute to type (null == text)
  attr: null,
  // either html or text
  contentType: 'html',
  // call when done callback function
  callback: function() {},
  // starting callback function before each string
  preStringTyped: function() {},
  //callback for every typed string
  onStringTyped: function() {},
  // callback for reset
  resetCallback: function() {}
 };


}(window.jQuery);

调用Typed.js

var string = $('#content').val();
$('#content-item').typed({
 strings: ["　　" + string],
 typeSpeed: 50,
 backDelay: 800,
 loop: false,
 loopCount: false
});

方法四（纯js）：

html代码：

js代码：

最后，发现实现打字效果还是蛮简单的对吧，css的思路是利用width和overflow:hidden，动画让宽度变宽实现像打字的样式，但是样式有限，不能实现多行显示。js/jquery，普遍都是先得到字的内容，然后再逐字往容器中添加文字。问题不难，主要是要善于思考！！

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