本文實例為大家分享了javascript實現倒計時提示框的具體代碼，供大家參考，具體內容如下
代碼：
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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{/*倒計時關閉提示框*/ 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為0，那么被定時0s，則要輸出abs(0-5)=5 ,如果i為5，那么被定時5s，則要輸出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);//每次間隔時間為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">打開全屏提示框</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>倒計時關閉</p> <span class="countDown">5</span> </div> </div></body></html> |
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/CWH0908/article/details/89736836
