vue中使用Loading这个加载工具

在src/theme文件夹中建立loading.scss文件，内容如下：

.loading-next {
	width: 100%;
	height: 100%;
}
.loading-next .loading-next-box {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
}
.loading-next .loading-next-box-warp {
	width: 80px;
	height: 80px;
}
.loading-next .loading-next-box-warp .loading-next-box-item {
	width: 33.333333%;
	height: 33.333333%;
	background: var(--el-color-primary);
	float: left;
	animation: loading-next-animation 1.2s infinite ease;
	border-radius: 1px;
}
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(7) {
	animation-delay: 0s;
}
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(4),
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(8) {
	animation-delay: 0.1s;
}
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(1),
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(5),
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(9) {
	animation-delay: 0.2s;
}
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(2),
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(6) {
	animation-delay: 0.3s;
}
.loading-next .loading-next-box-warp .loading-next-box-item:nth-child(3) {
	animation-delay: 0.4s;
}
@keyframes loading-next-animation {
	0%,
	70%,
	100% {
		transform: scale3D(1, 1, 1);
	}
	35% {
		transform: scale3D(0, 0, 1);
	}
}

在src/utils文件夹建立loading.js文件，内容如下：

import { nextTick } from 'vue';
import '/@/theme/loading.scss';

/**
 * 页面全局 Loading
 * @method start 创建 loading
 * @method done 移除 loading
 */
export const NextLoading = {
	// 创建 loading
	start: () => {
		const bodys = document.body;
		const div = document.createElement('div');
		div.setAttribute('class', 'loading-next');
		const htmls = `
			<div class="loading-next-box">
				<div class="loading-next-box-warp">
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
					<div class="loading-next-box-item"></div>
				</div>
			</div>
		`;
		div.innerHTML = htmls;
		bodys.insertBefore(div, bodys.childNodes[0]);
		window.nextLoading = true;
	},
	// 移除 loading
	done: (time = 0) => {
		nextTick(() => {
			setTimeout(() => {
				window.nextLoading = false;
				const el = document.querySelector('.loading-next');
				el?.parentNode?.removeChild(el);
			}, time);
		});
	},
};