javascript倒计时提示框_倒计时确认框-优快云博客

本文链接：https://blog.youkuaiyun.com/CWH0908/article/details/89736836

博客围绕JavaScript倒计时提示框展开，虽未给出具体内容，但可知其核心是利用JavaScript实现倒计时并搭配提示框功能，属于前端开发领域。

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>全屏提示框</title>
    <style>
        #button{
            width: 150px;
            height: 50px;
            background-color: greenyellow;
        }
        .fullScreenDiv{/* 全屏div */
            display: none;
            position: absolute;
            left: 0px;
            top: 0px;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.4);
        }
        .promptDiv{/* 提示框div */
            display: none;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translateX(-50%) translateY(-50%);
            width: 30%;
            height: 30%;
            border-radius: 20px;
            background-color:white;
            text-align: center;
        }
        .close{
            height: 34px;
            line-height: 34px;
            margin: 0px;
            text-align: right;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            background-color: cornflowerblue
        }
        .X{
            padding: 2px 6px;
            margin-right: 8px;
            color: white;
            cursor: pointer;
        }
        .countDown{/*倒计时关闭提示框*/
        	color: red;
        	font-size: 28px;
        }
    </style>
    <script>
        window.onload=function(){
            document.getElementById("button").addEventListener("click",function(){
                document.getElementsByClassName("fullScreenDiv")[0].style.display="block";
                document.getElementsByClassName("promptDiv")[0].style.display="block";
                    for(var i=5;i>=0;i--){
                        (function(i){
                            setTimeout(function(){
                            var j=Math.abs(i-5);//如果i为0，那么被定时0s，则要输出abs(0-5)=5	,如果i为5，那么被定时5s，则要输出abs(i-5)=0									
                            if(j==0){
											document.getElementsByClassName("fullScreenDiv")[0].style.display="none";
                                document.getElementsByClassName("promptDiv")[0].style.display="none";
                                }else{
                                document.getElementsByClassName("countDown")[0].innerHTML=j;
                                }					
                              },i*1000);//每次间隔时间为1s
                          })(i);				
                        }
               });
                   document.getElementsByClassName("X")[0].addEventListener("click",function(){
                       document.getElementsByClassName("fullScreenDiv")[0].style.display="none";
                       document.getElementsByClassName("promptDiv")[0].style.display="none";
                  });			
        }
    </script>
</head>
<body>
    <div>
        <button id="button">打开全屏提示框</button>
    </div>
    <div class="fullScreenDiv">
        <div class="promptDiv">
            <h4 class="close"><span class="X">X</span></h4>
	            <p>我是全屏提示框我是全屏提示框我是全屏提示框</p>
	            <p>倒计时关闭</p>
	            <span class="countDown">5</span>
        </div>
    </div>
</body>
</html>