Question

编辑：我没有真正问过我原来问题中应该提出的所有问题。为了帮助那些寻找类似答案的人们更容易，这就是最终的问题：

如何使用在语句末尾暂停的闪烁光标创建打字机效果，删除语句并写入新语句？

查看以下Yoshi的答案。它就是这样......

Answer 1

<强>插件：

(function ($) {
  // writes the string
  //
  // @param jQuery $target
  // @param String str
  // @param Numeric cursor
  // @param Numeric delay
  // @param Function cb
  // @return void
  function typeString($target, str, cursor, delay, cb) {
    $target.html(function (_, html) {
      return html + str[cursor];
    });

    if (cursor < str.length - 1) {
      setTimeout(function () {
        typeString($target, str, cursor + 1, delay, cb);
      }, delay);
    }
    else {
      cb();
    }
  }

  // clears the string
  //
  // @param jQuery $target
  // @param Numeric delay
  // @param Function cb
  // @return void
  function deleteString($target, delay, cb) {
    var length;

    $target.html(function (_, html) {
      length = html.length;
      return html.substr(0, length - 1);
    });

    if (length > 1) {
      setTimeout(function () {
        deleteString($target, delay, cb);
      }, delay);
    }
    else {
      cb();
    }
  }

  // jQuery hook
  $.fn.extend({
    teletype: function (opts) {
      var settings = $.extend({}, $.teletype.defaults, opts);

      return $(this).each(function () {
        (function loop($tar, idx) {
          // type
          typeString($tar, settings.text[idx], 0, settings.delay, function () {
            // delete
            setTimeout(function () {
              deleteString($tar, settings.delay, function () {
                loop($tar, (idx + 1) % settings.text.length);
              });
            }, settings.pause);
          });

        }($(this), 0));
      });
    }
  });

  // plugin defaults  
  $.extend({
    teletype: {
      defaults: {
        delay: 100,
        pause: 5000,
        text: []
      }
    }
  });
}(jQuery));

<强> HTML ：

<span id="target"></span>
<span id="cursor"></span> <!-- used for the blinking cursor effect -->

<强>初始化：

$('#target').teletype({
  text: [
    'Lorem ipsum dolor sit amet, consetetur sadipscing elitr,',
    'sed diam nonumy eirmod tempor invidunt ut labore et dolore',
    'magna aliquyam erat, sed diam voluptua. At vero eos et',
    'accusam et justo duo dolores et ea rebum. Stet clita kasd',
    'gubergren, no sea takimata sanctus est Lorem ipsum dolor sit',
    'amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr,',
    'sed diam nonumy eirmod tempor invidunt ut labore et dolore',
    'magna aliquyam erat, sed diam voluptua. At vero eos et accusam',
    'et justo duo dolores et ea rebum. Stet clita kasd gubergren,',
    'no sea takimata sanctus est Lorem ipsum dolor sit amet.'
  ]
});

$('#cursor').teletype({
  text: ['_', ' '],
  delay: 0,
  pause: 500
});

Answer 2

最后添加了一个简单的函数，并在它们之间添加了一些变量......

Fiddle

var where, when; //added

$.fn.teletype = function(opts){
    var $this = this,
        defaults = {
            animDelay: 50
        },
        settings = $.extend(defaults, opts);

    var letters = settings.text.length; //added

    where = '#' + $($this).attr('id'); //added
    when = settings.animDelay; //added

    $.each(settings.text, function(i, letter){
        setTimeout(function(){
            $this.html($this.html() + letter);

            if( $($this).html().length == letters ){ reverse(); } // Added to trigger reversing function

        }, settings.animDelay * i);
    });
};

$(function(){
    $('#container').teletype({
        animDelay: 100,
        text: 'Now is the time for all good men to come to the aid of their country...'
    });
});


// Added Reversing Function

    function reverse(){

        if ($(where).html().length > 0){          
            x = $(where).html().length - 1;
            y = $(where).html().substr(0, x);
            $(where).html(y);
            setTimeout(reverse , when);
        }else{
            console.log('Reverse Complete');
            clearTimeout(reverse);
        }
    }

Answer 3

您还可以查看我的名为 jquery-typewriter 的插件，它完全符合您的要求。

它可能没有那么多功能，但值得一看。

它有一个闪烁的光标、彩色文本等，这些都可以自定义。

链接如下： https://www.npmjs.com/package/jquery-typewriter

用jQuery打字机效果

3 个答案: