本文实例为大家分享了javascript自定义加载loading效果的具体代码，供大家参考，具体内容如下

加载中图片，底色为白色(看不到)

效果如图：

使用方法

this.tool.showLoading('加载中', this)this.tool.showLoading('合成中', this)this.tool.hideLoading()

引用文件

在App.vue中

<style scoped>@import './common.css';</style>

在main.js中

import tools from './tools'Vue.prototype.tool = tools

tools.js

export default { //显示加载框---使用方法，例如：this.tool.showLoading('正在加载',this,'1') showLoading (message, el, type) { var html = ''; html += '<i class="mui-spinner mui-spinner-white"></i>'; html += '<p class="text">' + (message || "数据加载中") + '</p>'; //遮罩层 var mask = document.getElementsByClassName("mui-show-loading-mask"); if (mask.length == 0) { mask = document.createElement('div'); mask.classList.add("mui-show-loading-mask"); // console.log(type) // 自己添加内容...start if (type !== '2' && type) { var winHig = document.documentElement.clientHeight; if (el.$refs.nav) { var heightNav = el.$refs.nav.offsetHeight; var heightFix = el.$refs.fixed.offsetHeight; if (type === '1') { var loHig = winHig - heightNav - heightFix + 'px' } else { loHig = winHig - heightFix + 'px' } mask.style.top = heightFix + 'px' mask.style.height = loHig } } // 自己添加内容...End document.body.appendChild(mask); mask.addEventListener("touchmove", function (e) { e.stopPropagation(); e.preventDefault(); }); } else { mask[0].classList.remove("mui-show-loading-mask-hidden"); } //加载框 var toast = document.getElementsByClassName("mui-show-loading"); if (toast.length == 0) { toast = document.createElement('div'); toast.classList.add("mui-show-loading"); toast.classList.add('loading-visible'); document.body.appendChild(toast); toast.innerHTML = html; toast.addEventListener("touchmove", function (e) { e.stopPropagation(); e.preventDefault(); }); } else { toast[0].innerHTML = html; toast[0].classList.add("loading-visible"); } }, //隐藏加载框----使用方法，例如：this.tool.hideLoading(); hideLoading (callback) { var mask = document.getElementsByClassName("mui-show-loading-mask"); var toast = document.getElementsByClassName("mui-show-loading"); if (mask.length > 0) { mask[0].classList.add("mui-show-loading-mask-hidden"); } if (toast.length > 0) { toast[0].classList.remove("loading-visible"); callback && callback(); }}

common.css

.mui-show-loading { position: fixed; padding: 5px; width: 120px; min-height: 120px; top: 45%; left: 50%; margin-left: -60px; background: rgba(0, 0, 0, 0.6); text-align: center; border-radius: 5px; color: #FFFFFF; visibility: hidden; margin: 0; z-index: 2000; -webkit-transition-duration: .2s; transition-duration: .2s; opacity: 0; -webkit-transform: scale(0.9) translate(-50%, -50%); transform: scale(0.9) translate(-50%, -50%); -webkit-transform-origin: 0 0; transform-origin: 0 0;}.mui-show-loading.loading-visible { opacity: 1; visibility: visible; -webkit-transform: scale(1) translate(-50%, -50%); transform: scale(1) translate(-50%, -50%);}.mui-show-loading .mui-spinner { margin-top: 24px; width: 36px; height: 36px;}.mui-show-loading .text { line-height: 1.6; font-family: -apple-system-font, "Helvetica Neue", sans-serif; font-size: 14px; margin: 10px 0 0; color: #fff;}.mui-show-loading-mask { position: fixed; z-index: 1000; top: 0; right: 0; left: 0; bottom: 0; background-color: rgba(0, 0, 0, 0);}.mui-show-loading-mask-hidden { display: none !important;}.mui-toast-container { top: 5% !important; width: auto; text-align: center;}.mui-toast-message { background: url(/app/themes/default/images/toast.png) no-repeat center 10px #000; background-color: rgba(0, 0, 0, .8); color: #fff; display: inline-block; width: auto; margin: 0 auto; }.mui-spinner-white:after { background-image: url(./assets/loding.png);}.mui-loading .mui-spinner { display: block; margin: 0 auto;}.mui-spinner { display: inline-block; width: 24px; height: 24px; -webkit-transform-origin: 50%; transform-origin: 50%; -webkit-animation: spinner-spin 1s step-end infinite; animation: spinner-spin 1s step-end infinite;}.mui-btn .mui-spinner { width: 14px; height: 14px; vertical-align: text-bottom;}.mui-btn-block .mui-spinner { width: 22px; height: 22px;}.mui-spinner:after { display: block; width: 100%; height: 100%; content: ''; background-repeat: no-repeat; background-position: 50%; background-size: 100%;}@-webkit-keyframes spinner-spin { 0% { -webkit-transform: rotate(0deg); } 8.33333333% { -webkit-transform: rotate(30deg); } 16.66666667% { -webkit-transform: rotate(60deg); } 25% { -webkit-transform: rotate(90deg); } 33.33333333% { -webkit-transform: rotate(120deg); } 41.66666667% { -webkit-transform: rotate(150deg); } 50% { -webkit-transform: rotate(180deg); } 58.33333333% { -webkit-transform: rotate(210deg); } 66.66666667% { -webkit-transform: rotate(240deg); } 75% { -webkit-transform: rotate(270deg); } 83.33333333% { -webkit-transform: rotate(300deg); } 91.66666667% { -webkit-transform: rotate(330deg); } 100% { -webkit-transform: rotate(360deg); }}@keyframes spinner-spin { 0% { transform: rotate(0deg); } 8.33333333% { transform: rotate(30deg); } 16.66666667% { transform: rotate(60deg); } 25% { transform: rotate(90deg); } 33.33333333% { transform: rotate(120deg); } 41.66666667% { transform: rotate(150deg); } 50% { transform: rotate(180deg); } 58.33333333% { transform: rotate(210deg); } 66.66666667% { transform: rotate(240deg); } 75% { transform: rotate(270deg); } 83.33333333% { transform: rotate(300deg); } 91.66666667% { transform: rotate(330deg); } 100% { transform: rotate(360deg); }}

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。