html文件:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>弹幕效果</title> <style> html, body { margin: 0px; padding: 0px; 100%; height: 100%; font-family: "微软雅黑"; font-size: 62.5%; } .boxDom { 100%; height: 100%; position: relative; overflow: hidden; } .idDom { 100%; height: 100px; background: #666; position: fixed; bottom: 0px; } .content { display: inline-block; 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; 300px; height: 30px; border-radius: 5px; font-size: 2.4em; } .btn { 60px; height: 30px; background: #f90000; border:none; color: #fff; font-size: 2.4em; } span { 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> </body> <script src="jquery-1.12.4.js"></script> <script> $(function(){ //注册事件 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> </html>