本篇内容介绍了“原生JavaScript怎么实现模态框”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
原生js封装模态框
最近需要一个模态框，然后一种是提示类的，一种是确认类型，我就想着再网上找一个然后修改一下，结果找到了，但是不深特别合适，我再次基础上在做了修改，对功能有所增强，纯原生写的，没有任何依赖性，适应性比较强，值copy即可使用。
配置：可以在实例化时对options进行参数设置，达到自己想要的效果
示例效果
代码
HTML部分
<head><meta charset="utf-8"> <title>弹出框</title></head>CSS部分
.mask {position: fixed;top: 0;bottom: 0;left: 0;right: 0;background: #bfbfbf;opacity: 0.5;}.modal {position: fixed;top: 50%;left: 50%;transform: translate(-50%, -50%);width: 400px;background-color: aliceblue;border-radius: 5px;z-index: 99;border: 1px solid rgba(0, 0, 0, 0.2);}.modal .modalTitle {height: 50px;box-sizing: content-box;display: flex;align-items: center;justify-content: space-between;border-bottom: 2px solid #eeeeee;padding: 0 16px;}.modalTitle .closeModal {width: 20px;height: 20px;border-radius: 5px;line-height: 20px;text-align: center;font-size: 14px;cursor: pointer;background-image: url('https://typroas.oss-cn-hangzhou.aliyuncs.com/typroaImg/close.png');background-size: 100% 100%;}.modalTitleText {margin: 0 auto;font-size: 17px;}.modal .main {box-sizing: border-box;padding: 16px;height: calc(100% - 80px);}.modal .footer {height: 50px;text-align: right;box-sizing: border-box;padding-right: 16px;display: flex;align-items: center;justify-content: flex-end;}.footer .btnLeft,.footer .btnRight {width: 120px;height: 35px;text-align: center;line-height: 30px;border: none;border-radius: 0.2rem;margin-left: 8px;background-color: #dddddd;}.footer .btnOk {width: 120px;height: 35px;text-align: center;line-height: 30px;border: none;border-radius: 0.3rem;background-color: #1d73d3;margin: 0 auto;font-size: 17px;color: white;}.footer .btnLeft:hover,.footer .btnRight:hover {background-color: #1D73D3;color: #FFFFFF;}JS部分
function Modal(options) {options = Object.assign({lateRelease: options.lateRelease ? options.lateRelease : false, //是否开启延时关闭lateReleaseTime: options.lateReleaseTime ? options.lateReleaseTime : 5000, // 延时关闭时间isCreateOpen: options.isCreateOpen ? options.isCreateOpen : true, //是否创建完毕后就打开弹出框type: options.type ? options.type : 'hint', // hint:提示框 confirm:确认框isTopRightcancel: true, // 是否需要右上角小x取消按钮modalTitle: options.modalTitle ? options.modalTitle : '温馨提示',backgroundColor: options.backgroundColor ? options.backgroundColor : '#fff', // 背景颜色mask: options.mask ? options.mask : true, //是否显示遮罩层,content: options.content ? options.content : '', //弹框内容cancelText: options.cancelText ? options.cancelText : '取消', //取消按钮文字okText: options.okText ? options.okText : '确认', // 确认按钮文字,width: options.width ? options.width : 500, //对话框的宽度onCancel: options.onCancel ? options.onCancel : this.closeModal, //取消按钮回调，默认是关闭弹框cancelCallBack: options.cancelCallBack ? options.cancelCallBack : () => {console.log('你点击了取消');}, //取消回调onOkCallBack: options.onOkCallBack ? options.onOkCallBack : () => {console.log('你点击了确认');}, // 确认按钮回调}, options);this.options = options;// 创建遮罩层function createMask() {let mask = document.createElement('div')mask.className = 'mask';document.body.appendChild(mask);}// 创建modal弹框function createModal(type) {let modal = document.createElement('div');let modalTitleDom = document.createElement('div');let main = document.createElement('div');let footer = document.createElement('div');let btnLeft;let btnRight;let btnOk;let closeIcon;if (type == 'hint') {btnOk = document.createElement('button');btnOk.className = 'btnOk';} else if (type == 'confirm') {btnLeft = document.createElement('button');btnLeft.className = 'btnLeft';btnRight = document.createElement('button');btnRight.className = 'btnRight';}let {modalTitle,content,cancelText,okText,width,onCancel,onOkCallBack,backgroundColor,cancelCallBack,isTopRightcancel,isCreateOpen} = this.options;modal.className = 'modal';modal.style.width = width + 'px';modal.style.backgroundColor = backgroundColor;modalTitleDom.className = 'modalTitle'modalTitleDom.innerHTML = `<span class="modalTitleText">${modalTitle}</span>`;if (isTopRightcancel) {closeIcon = document.createElement('span');closeIcon.addEventListener('click', closeModal.bind(this));closeIcon.className = 'closeModal';modalTitleDom.appendChild(closeIcon);}main.className = 'main';main.innerHTML = content;footer.className = 'footer';if (type == 'hint') {btnOk.innerHTML = '确认';footer.appendChild(btnOk);onCancel = onCancel ? onCancel : this.closeModal;btnOk.addEventListener('click', onCancel.bind(this));} else if (type == 'confirm') {btnLeft.innerHTML = '取消';btnRight.innerHTML = '确认';footer.appendChild(btnLeft);footer.appendChild(btnRight);onCancel = onCancel ? onCancel : this.closeModal;btnLeft.addEventListener('click', onCancel.bind(this));btnRight.addEventListener('click', onOkCallBack);}modal.appendChild(modalTitleDom);modal.appendChild(main);modal.appendChild(footer);modal.className = 'modal';this.options.onCancel = onCancel.bind(this);document.body.appendChild(modal);}// 关闭弹框function closeModal(ev) {options.cancelCallBack();let target = ev ? ev.path[2] : document.getElementsByClassName('modal')[0];let {mask} = this.optionsmask ? document.body.removeChild(document.querySelector('.mask')) : null;document.body.removeChild(target);}function openModal() {this.init();}// 初始化function init() {let {mask} = this.optionsmask ? createMask() : nullthis.createModal(this.options.type);}Modal.prototype.init = init;Modal.prototype.createModal = createModal;Modal.prototype.closeModal = closeModal;Modal.prototype.openModal = openModal;// 执行初始化方法if (this.options.isCreateOpen) {this.init();if (this.options.lateRelease) {setTimeout(() => {let modal = document.getElementsByClassName('modal')[0];if(modal){this.options.onCancel();}}, this.options.lateReleaseTime);}}}document.getElementById("btn").addEventListener('click', () => {let modal = new Modal({lateRelease: true,modalTitle: '我是第二个',content: `<p>日常开发中，秒杀下单、抢红包等等业务场景，都需要用到分布式锁。而Redis非常适合作为分布式锁使用。本文将分七个方案展开，跟大家探讨Redis分布式锁的正确使用方式。如果有不正确的地方，欢迎大家指出哈，一起学习一起进步。</p>`})// modal.closeModal();// modal.openModal();})完整代码
<!DOCTYPE html><html><head><meta charset="utf-8"> <title>弹出框</title></head><style type="text/css">.mask {position: fixed;top: 0;bottom: 0;left: 0;right: 0;background: #bfbfbf;opacity: 0.5;}.modal {position: fixed;top: 50%;left: 50%;transform: translate(-50%, -50%);width: 400px;background-color: aliceblue;border-radius: 5px;z-index: 99;border: 1px solid rgba(0, 0, 0, 0.2);}.modal .modalTitle {height: 50px;box-sizing: content-box;display: flex;align-items: center;justify-content: space-between;border-bottom: 2px solid #eeeeee;padding: 0 16px;}.modalTitle .closeModal {width: 20px;height: 20px;border-radius: 5px;line-height: 20px;text-align: center;font-size: 14px;cursor: pointer;background-image: url('https://typroas.oss-cn-hangzhou.aliyuncs.com/typroaImg/close.png');background-size: 100% 100%;}.modalTitleText {margin: 0 auto;font-size: 17px;}.modal .main {box-sizing: border-box;padding: 16px;height: calc(100% - 80px);}.modal .footer {height: 50px;text-align: right;box-sizing: border-box;padding-right: 16px;display: flex;align-items: center;justify-content: flex-end;}.footer .btnLeft,.footer .btnRight {width: 120px;height: 35px;text-align: center;line-height: 30px;border: none;border-radius: 0.2rem;margin-left: 8px;background-color: #dddddd;}.footer .btnOk {width: 120px;height: 35px;text-align: center;line-height: 30px;border: none;border-radius: 0.3rem;background-color: #1d73d3;margin: 0 auto;font-size: 17px;color: white;}.footer .btnLeft:hover,.footer .btnRight:hover {background-color: #1D73D3;color: #FFFFFF;}</style><body><button type="button" id="btn">弹出</button><script type="text/javascript">function Modal(options) {options = Object.assign({lateRelease: options.lateRelease ? options.lateRelease : false, //是否开启延时关闭lateReleaseTime: options.lateReleaseTime ? options.lateReleaseTime : 5000, // 延时关闭时间isCreateOpen: options.isCreateOpen ? options.isCreateOpen : true, //是否创建完毕后就打开弹出框type: options.type ? options.type : 'hint', // hint:提示框 confirm:确认框isTopRightcancel: true, // 是否需要右上角小x取消按钮modalTitle: options.modalTitle ? options.modalTitle : '温馨提示',backgroundColor: options.backgroundColor ? options.backgroundColor : '#fff', // 背景颜色mask: options.mask ? options.mask : true, //是否显示遮罩层,content: options.content ? options.content : '', //弹框内容cancelText: options.cancelText ? options.cancelText : '取消', //取消按钮文字okText: options.okText ? options.okText : '确认', // 确认按钮文字,width: options.width ? options.width : 500, //对话框的宽度onCancel: options.onCancel ? options.onCancel : this.closeModal, //取消按钮回调，默认是关闭弹框cancelCallBack: options.cancelCallBack ? options.cancelCallBack : () => {console.log('你点击了取消');}, //取消回调onOkCallBack: options.onOkCallBack ? options.onOkCallBack : () => {console.log('你点击了确认');}, // 确认按钮回调}, options);this.options = options;// 创建遮罩层function createMask() {let mask = document.createElement('div')mask.className = 'mask';document.body.appendChild(mask);}// 创建modal弹框function createModal(type) {let modal = document.createElement('div');let modalTitleDom = document.createElement('div');let main = document.createElement('div');let footer = document.createElement('div');let btnLeft;let btnRight;let btnOk;let closeIcon;if (type == 'hint') {btnOk = document.createElement('button');btnOk.className = 'btnOk';} else if (type == 'confirm') {btnLeft = document.createElement('button');btnLeft.className = 'btnLeft';btnRight = document.createElement('button');btnRight.className = 'btnRight';}let {modalTitle,content,cancelText,okText,width,onCancel,onOkCallBack,backgroundColor,cancelCallBack,isTopRightcancel,isCreateOpen} = this.options;modal.className = 'modal';modal.style.width = width + 'px';modal.style.backgroundColor = backgroundColor;modalTitleDom.className = 'modalTitle'modalTitleDom.innerHTML = `<span class="modalTitleText">${modalTitle}</span>`;if (isTopRightcancel) {closeIcon = document.createElement('span');closeIcon.addEventListener('click', closeModal.bind(this));closeIcon.className = 'closeModal';modalTitleDom.appendChild(closeIcon);}main.className = 'main';main.innerHTML = content;footer.className = 'footer';if (type == 'hint') {btnOk.innerHTML = '确认';footer.appendChild(btnOk);onCancel = onCancel ? onCancel : this.closeModal;btnOk.addEventListener('click', onCancel.bind(this));} else if (type == 'confirm') {btnLeft.innerHTML = '取消';btnRight.innerHTML = '确认';footer.appendChild(btnLeft);footer.appendChild(btnRight);onCancel = onCancel ? onCancel : this.closeModal;btnLeft.addEventListener('click', onCancel.bind(this));btnRight.addEventListener('click', onOkCallBack);}modal.appendChild(modalTitleDom);modal.appendChild(main);modal.appendChild(footer);modal.className = 'modal';this.options.onCancel = onCancel.bind(this);document.body.appendChild(modal);}// 关闭弹框function closeModal(ev) {options.cancelCallBack();let target = ev ? ev.path[2] : document.getElementsByClassName('modal')[0];let {mask} = this.optionsmask ? document.body.removeChild(document.querySelector('.mask')) : null;document.body.removeChild(target);}function openModal() {this.init();}// 初始化function init() {let {mask} = this.optionsmask ? createMask() : nullthis.createModal(this.options.type);}Modal.prototype.init = init;Modal.prototype.createModal = createModal;Modal.prototype.closeModal = closeModal;Modal.prototype.openModal = openModal;// 执行初始化方法if (this.options.isCreateOpen) {this.init();if (this.options.lateRelease) {setTimeout(() => {let modal = document.getElementsByClassName('modal')[0];if(modal){this.options.onCancel();}}, this.options.lateReleaseTime);}}}document.getElementById("btn").addEventListener('click', () => {let modal = new Modal({lateRelease: true,modalTitle: '我是第二个',content: `<p>日常开发中，秒杀下单、抢红包等等业务场景，都需要用到分布式锁。而Redis非常适合作为分布式锁使用。本文将分七个方案展开，跟大家探讨Redis分布式锁的正确使用方式。如果有不正确的地方，欢迎大家指出哈，一起学习一起进步。</p>`})// modal.closeModal();// modal.openModal();})</script></body></html>“原生JavaScript怎么实现模态框”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注编程网网站，小编将为大家输出更多高质量的实用文章！
