jQuery弹幕效果

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jQuery弹幕效果

在这里插入图片描述

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>吐槽弹幕</title>
    
    <script type="text/javascript" src="jquery-3.2.1.min.js" ></script>
    <style>
            html, body {
      margin: 0px;
      padding: 0px;
      width: 100%;
      height: 100%;
      font-family: "微软雅黑";
      font-size: 62.5%;
    }
    
    .boxDom {
      width: 100%;
      height: 100%;
      position: relative;
      overflow: hidden;
    }
    
    .idDom {
      width: 100%;
      height: 100px;
      background: #666;
      position: fixed;
      bottom: 0px;
    }
    
    .content {
      display: inline-block;
      width: 430px;
      height: 40px;
      position: absolute;
      left: 0px;
      right: 0px;
      top: 0px;
      bottom: 0px;
      margin: auto;
    }
    
    .title {
      display: inline;
      font-size: 4em;
      vertical-align: bottom;
      color: #fff;
    }
    
    .text {
      border: none;
      width: 300px;
      height: 30px;
      border-radius: 5px;
      font-size: 2.4em;
    }
    
    .btn {
      width: 60px;
      height: 30px;
      background: #f90000;
      border: none;
      color: #fff;
      font-size: 2.4em;
    }
    
    span {
      width: 300px;
      height: 40px;
      position: absolute;
      overflow: hidden;
      color: #000;
      font-size: 4em;
      line-height: 1.5em;
      cursor: pointer;
      white-space: nowrap;
    }
    </style> 
</head> 
   
<body>
    
<div class="boxDom" id="boxDom">
  <div class="idDom" id="idDom">
    <div class="content">
      <p class="title">吐槽:</p>
      <input type="text" class="text" id="text"/>
      <button type="button" class="btn" id="btn">发射</button>
    </div>
  </div>
</div>
 
<script>
   
  
  $(function () {
    
      //注册事件  各个颜色的弹幕字体
    var colors = ["red", "green", "hotpink", "pink", "cyan", "yellowgreen", "purple", "deepskyblue"];
    $("#btn").click(function () {
      var randomColor = parseInt(Math.random() * colors.length);
      var randomY = parseInt(Math.random() * 400);
      
      $("<span></span>")//创建span
        .text($("#text").val())//设置内容
        .css("color", colors[randomColor])//设置字体颜色
        .css("left", "1400px")//设置left值
        .css("top", randomY)//设置top值
        .animate({left: -500}, 10000, "linear", function () {
          //到了终点，需要删除
          $(this).remove();
        })//添加动画
        .appendTo("#boxDom");
      
      
      $("#text").val("");
    });
    
    
    $("#text").keyup(function (e) {
      if (e.keyCode == 13) {
        $("#btn").click();
      }
    });
    
  });
</script>
</body>
</html>