jQuery实现弹幕特效 - javascript

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HTML²¿·Ö

<!DOCTYPE html>


<html>
 <head>
 <meta charset="utf-8">
 <title>jQueryµ¯Ä»°¸Àý</title>
 <link rel="stylesheet" type="text/css" http://www.3qphp.com/down51jb/list-67.html rel="external nofollow" />
 </head>
 <body>
 <div class="box">
 <div class="top"></div>
 <div class="bot">
 <input type="text" id="txt" placeholder="ÎÒÀ´ËµÁ½¾ä¡£¡£¡£" />
 <button type="button" id="btn">·¢ËÍ</button>
 </div>
 </div>
 <script src="jquery-1.12.4.js"></script>
 <script>
 $(function() {
 var colors = ["red", "green", "hotpink", "pink", "cyan", "yellowgreen", "purple", "deepskyblue"];
 $("#btn").on("click", function() {
  var randomColor = parseInt(Math.random() * colors.length);
  var randomY = parseInt(Math.random() * 400);
  $("<span></span>") //´´½¨span
  .text($("#txt").val()) //ÉèÖÃÄÚÈÝ
  .css("color", colors[randomColor]) //ÉèÖÃ×ÖÌåÑÕÉ«
  .css("left", "1400px") //ÉèÖÃleftÖµ
  .css("top", randomY) //ÉèÖÃtopÖµ
  .animate({
  left: -500
  }, 10000, "linear", function() {
  //µ½ÁËÖÕµã£¬ÐèÒªÉ¾³ý
  $(this).remove();
  }) //Ìí¼Ó¶¯»
  .appendTo(".top");

  $("#txt").val("");
 });
 });
 </script>
 </body>
</html>

CSS²¿·Ö

* {
 margin: 0;
 padding: 0;
}

.box {
 width: 1600px;
 height: 757px;
}

.top {
 width: 100%;
 height: 660px;
 position: relative;
}

.bot {
 width: 100%;
 height: 97px;
 background-color: #666666;
 position: relative;
}

#txt {
 width: 300px;
 height: 30px;
 border-radius: 5px;
 position: absolute;
 left: 50%;
 margin-left: -150px;
 top: 50%;
 margin-top: -15px;
 border: none;
}

#btn {
 width: 60px;
 height: 30px;
 color: white;
 background-color: red;
 position: absolute;
 left: 955px;
 top: 34px;
 border: none;
}

span {
 position: absolute;
 color: #000;
 font-size: 50px;
 line-height: 1.5em;
 cursor: pointer;
 white-space: nowrap;
}

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