javascript自定义提示窗口效果图：
源码：
1.demo.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>自定义提示窗口</title> <script type="text/javascript" src="/UploadFiles/2021-04-02/myAlert.js">2.myAlert.js
/** * Created by zhuwenqi on 2017/6/20. */ /** * @param options 基本配置 * @constructor */ function MyAlert(options) { this.options = options ; } /** * 提示窗口 * @param title 提示标题，默认为"" * @param content 提示内容,默认为"" * @param closeTime 提示窗口自动关闭时间，单位为ms，默认为2000ms */ MyAlert.prototype.alert = function (title,content,closeTime) { var div_background = document.createElement("div"); div_background.style.position = "absolute"; div_background.style.left = "0"; div_background.style.top = "0"; div_background.style.width = "100%"; div_background.style.height = "100%"; div_background.style.backgroundColor = "rgba(0,0,0,0.1)"; div_background.style.zIndex = "1001"; var div_alert = document.createElement("div"); div_alert.style.position = "absolute"; div_alert.style.left = "40%"; div_alert.style.top = "0"; div_alert.style.width = "20%"; div_alert.style.height = "20%"; div_alert.style.overflow = "auto"; div_alert.style.backgroundColor = "rgba(255,255,255,0.5)"; div_alert.style.zIndex = "1002"; div_alert.style.border = "1px solid blue"; div_alert.style.borderRadius = "10px"; div_alert.style.boxShadow = "0 0 10px gray"; var div_title = document.createElement("div"); div_title.style.backgroundColor = "rgba(0,255,0,0.3)"; div_title.style.textAlign = "center"; var span_title = document.createElement("span"); span_title.style.fontSize = "20px"; span_title.style.fontWeight = "bold"; var text_title = document.createTextNode((title === undefined || title === null) "" : title) ; span_title.appendChild(text_title); div_title.appendChild(span_title); div_alert.appendChild(div_title); var div_content = document.createElement("div"); div_content.style.lineHeight = "35px"; div_content.style.paddingLeft = "10px"; var span_content = document.createElement("span"); var text_content = document.createTextNode((content === undefined || content === null) "" : content); span_content.appendChild(text_content); div_content.appendChild(span_content); div_alert.appendChild(div_content); document.body.appendChild(div_background); document.body.appendChild(div_alert); setTimeout(function () { document.body.removeChild(div_alert); document.body.removeChild(div_background); },(closeTime === undefined || closeTime === null || closeTime === "") ? 2000 : closeTime); };以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。