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！
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
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;
/* 遮罩层颜色 */
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
/**
* 弹出框
* @param {Object} options 弹出框配置项
*/
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.options
mask ? document.body.removeChild(document.querySelector('.mask')) : null;
document.body.removeChild(target);
}
/**
* 当设置默认打开的时候可手动调用该方法
*/
function openModal() {
this.init();
}
// 初始化
function init() {
let {
mask
} = this.options
mask ? createMask() : null
this.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;
/* 遮罩层颜色 */
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">
/**
* 弹出框
* @param {Object} options 弹出框配置项
*/
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.options
mask ? document.body.removeChild(document.querySelector('.mask')) : null;
document.body.removeChild(target);
}
/**
* 当设置默认打开的时候可手动调用该方法
*/
function openModal() {
this.init();
}
// 初始化
function init() {
let {
mask
} = this.options
mask ? createMask() : null
this.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亿速云网站，小编将为大家输出更多高质量的实用文章！
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