vue3+element-plus 如何实现全局配置ElLoading默认值_ele vue3 loading 设置全局

项目场景：

公司项目中使用element-plus的loading效果时想更改默认的loading图标

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问题描述

遗憾的是el-config-provider没有对应的全局配置属性，无法通过全局配置简单实现。

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解决方案：

第一时间想到用覆盖样式的方式解决，但思考之后觉得不是很完美，于是研究了第二套方案，废话不多说，直接上代码。

方案一：

大致就是将图中svg标签隐藏掉，给el-loading-spinner类添加before或after，再结合自定义的样式和动画实现loading效果。

方案二：

通过重写ElLoading的方式实现，具体如下：

1、在plugins文件夹下新建wrapElLoading.ts文件

wrapElLoading.ts

import {ElLoading} from "element-plus";
 
/**
 * @description 扩展ElLoading,传入默认值
 */
export default {
    install(app: any) {
        const svg: string = `<path d="M21.38,4.58a4.62,4.62,0,0,0,9.24,0h0a4.62,4.62,0,0,0-9.24,0Z" fill="#9ab1c9"/><path d="M6.33,10.39a3.75,3.75,0,0,0,7.49,0h0a3.75,3.75,0,0,0-7.49,0Z" fill="#9ab1c9"/><path d="M0,25.86a3.43,3.43,0,0,0,6.86,0h0a3.41,3.41,0,0,0-3.43-3.4A3.41,3.41,0,0,0,0,25.85Z" fill="#9ab1c9"/><path d="M6.88,41.66a3.2,3.2,0,1,0,3.2-3.17A3.18,3.18,0,0,0,6.88,41.66Z" fill="#9ab1c9"/><path d="M23.32,47.35a2.68,2.68,0,0,0,5.36,0h0a2.68,2.68,0,0,0-5.36,0Z" fill="#9ab1c9"/><path d="M39.68,41.66a2.14,2.14,0,0,0,4.28,0h0a2.14,2.14,0,0,0-4.28,0Z" fill="#9ab1c9"/><path d="M46.85,26A1.58,1.58,0,0,0,50,26h0a1.58,1.58,0,0,0-3.15,0Z" fill="#9ab1c9"/><path d="M40.77,10.2a1.12,1.12,0,1,0,1.12-1.11A1.12,1.12,0,0,0,40.77,10.2Z" fill="#9ab1c9"/>`;
        const loadingDir: any = ElLoading.directive
        const originDirMounted = loadingDir.mounted;
        loadingDir.mounted = function (el: any, binding: any, vnode: any, prevVnode: any) {
            // 需要覆盖哪些默认属性值在这里设置，具体属性名参考官网loading指令用法
            el.setAttribute('element-loading-svg', svg)
            originDirMounted.call(this, el, binding, vnode, prevVnode)
        }
        const originService = ElLoading.service;
        ElLoading.service = function (options: any = {}) {
            return originService.call(this, Object.assign({ svg}, options))
        }
        app.config.globalProperties.$loading = ElLoading.service;
        // 如果在main.ts中全局使用了ElementPlus —> app.use(ElementPlus),则下面这行代码不需要
        // app.use(ElLoading);
    }
}

2、在main.ts中use即可

import WrapElLoading from "@/plugins/wrapElLoading";
 
// 若项目采用全局引入ElementPlus，则须在app.use(ElementPlus)后执行
app.use(WrapElLoading);

3、在组件中使用：

<template>
  <div class="about">
    <el-button @click="showLoading">show loading</el-button>
    <el-button @click="manualLoading">manual loading</el-button>
 
    <div v-loading="loading" element-loading-text="加载中……" class="loading-wrap"></div>
    <div ref="manualLoadingRef" class="loading-wrap"></div>
 
  </div>
</template>
 
<script setup lang="ts">
import {getCurrentInstance, ref} from "vue";
 
const ctx: any = getCurrentInstance()?.appContext.config.globalProperties
 
const loading = ref(false);
const manualLoadingRef = ref();
 
function showLoading() {
  loading.value = !loading.value
}
 
function manualLoading() {
  const loadingIns = ctx.$loading({target: manualLoadingRef.value})
  setTimeout(() => {
    loadingIns.close()
  }, 2000)
}
 
</script>
 
<style lang="scss" scoped>
.about {
  border: 1px solid #42b983;
  height: 100%;
  padding: 60px;
 
  .loading-wrap {
    width: 200px;
    height: 200px;
    border: 1px solid #ccc;
  }
}
 
</style>