1.实现效果

vue-loading.gif

2.实现原理

• Vue.extend:extend 创建的是 Vue 构造器,可通过 new Profile().$mount('#mount-point') 来挂载到指定的元素上。

在这里插入图片描述

• vue中install方法：

export default {
    install(Vue,option){
        组件
        指令
        混入
        挂载vue原型
    }
}

3.实现代码

新建components文件夹-新建loading001文件夹-新建index.vue+index.js
index.vue

<template>
  <div v-if="show">
    <div class="loader-rainbow">
      <div class="loader-inner">
        <div class="loader-line-wrap">
          <div class="loader-line"></div>
        </div>
        <div class="loader-line-wrap">
          <div class="loader-line"></div>
        </div>
        <div class="loader-line-wrap">
          <div class="loader-line"></div>
        </div>
        <div class="loader-line-wrap">
          <div class="loader-line"></div>
        </div>
        <div class="loader-line-wrap">
          <div class="loader-line"></div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "loading001",
  props: {
    show: Boolean,
  },
  data() {
    return {};
  },
};
</script>

<style scoped>
.loader-rainbow {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
}
.loader-inner {
  bottom: 0;
  height: 100px;
  left: 0;
  margin: auto;
  position: absolute;
  right: 0;
  top: 0;
  width: 100px;
}

.loader-line-wrap {
  animation: spin 2000ms cubic-bezier(0.175, 0.885, 0.32, 1.275) infinite;
  box-sizing: border-box;
  height: 50px;
  left: 0;
  overflow: hidden;
  position: absolute;
  top: 0;
  transform-origin: 50% 100%;
  width: 100px;
}
.loader-line {
  border: 4px solid transparent;
  border-radius: 100%;
  box-sizing: border-box;
  height: 100px;
  left: 0;
  margin: 0 auto;
  position: absolute;
  right: 0;
  top: 0;
  width: 100px;
}
.loader-line-wrap:nth-child(1) {
  animation-delay: -50ms;
}
.loader-line-wrap:nth-child(2) {
  animation-delay: -100ms;
}
.loader-line-wrap:nth-child(3) {
  animation-delay: -150ms;
}
.loader-line-wrap:nth-child(4) {
  animation-delay: -200ms;
}
.loader-line-wrap:nth-child(5) {
  animation-delay: -250ms;
}

.loader-line-wrap:nth-child(1) .loader-line {
  border-color: hsl(0, 80%, 60%);
  height: 90px;
  width: 90px;
  top: 7px;
}
.loader-line-wrap:nth-child(2) .loader-line {
  border-color: hsl(60, 80%, 60%);
  height: 76px;
  width: 76px;
  top: 14px;
}
.loader-line-wrap:nth-child(3) .loader-line {
  border-color: hsl(120, 80%, 60%);
  height: 62px;
  width: 62px;
  top: 21px;
}
.loader-line-wrap:nth-child(4) .loader-line {
  border-color: hsl(180, 80%, 60%);
  height: 48px;
  width: 48px;
  top: 28px;
}
.loader-line-wrap:nth-child(5) .loader-line {
  border-color: hsl(240, 80%, 60%);
  height: 34px;
  width: 34px;
  top: 35px;
}

@keyframes spin {
  0%,
  15% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}
</style>

index.js

import Vue from 'vue'
import loading001 from './index.vue'

const LoadingConstructor = Vue.extend(loading001)

const instance = new LoadingConstructor({
    el: document.createElement('div')
})

instance.show = false
const loading = {
    show() {
        instance.show = true
        document.body.appendChild(instance.$el)
    },
    hide() {
        instance.show = false
    }
}

export default {
    install() {
        if (!Vue.$showLoading) {
            Vue.$showLoading = loading
        }
        Vue.mixin({
            created() {
                this.$showLoading = Vue.$showLoading
            }
        })
    }
}

main.js引入

import loading001 from '@/components/loading001/index.js'
Vue.use(loading001)

页面中引用

 this.$showLoading.show();
 this.$showLoading.hide();

在js中引用，如封装axios场景

 Vue.$showLoading.show()
 Vue.$showLoading.hide()

4.完整代码，关注公众号 苏苏的bug，更多vue相关，尽在苏苏的码云如果对你有帮助，欢迎你的star+订阅！