Vue3实现页面顶部进度条

Vue3项目使用导航守卫给页面增加进度条

新建进度条组件

loadingBar.vue

<template>
  <div class="wraps">
    <div ref="bar" class="bar"></div>
  </div>
</template>

<script setup lang=ts>
import { domainToASCII } from 'url';
import {onMounted, ref} from 'vue'

let speed = ref<number>(1)
let bar = ref<HTMLElement>();
let timer = ref<number>(0);
const startLoading = () => {
  let dom = bar.value as HTMLElement
  speed.value = 1;
  timer.value = window.requestAnimationFrame(function fn(){
    if(speed.value < 90){
      speed.value += 1
      dom.style.width = speed.value+'%';
      timer.value = window.requestAnimationFrame(fn)
    }else{
      speed.value = 1;
      window.cancelAnimationFrame(timer.value)
    }
  })
}

const endLoading = ()=>{
  let dom = bar.value as HTMLElement
  setTimeout(() => {
    window.requestAnimationFrame(()=>{
    speed.value = 100;
    dom.style.width = speed.value+"%"
  })
  }, 1000);
}
//暴露方法
defineExpose({
  startLoading,
  endLoading
})
</script>

<style scoped lang="less">
.wraps{
  position: fixed;
  top:0;
  width: 100%;
  height: 2px;
  .bar{
    height: inherit;
    width: 0;
    background: #1abcdc;
  }
}
</style>
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新建bar.ts

import loadingBarVue from "./components/loadingBar.vue";
import { createVNode,render } from "vue";
const bar = createVNode(loadingBarVue);
render(bar,document.body)
export default bar
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导航守卫中使用

main.ts

//import './assets/main.css'

import { createApp,createVNode,render } from 'vue'
import { createPinia } from 'pinia'
import App from './App.vue'
import router from './router'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import bar from './bar'

const app = createApp(App)
app.use(ElementPlus)
app.use(createPinia())
app.use(router)

const whileList = ['/']

router.beforeEach((to,from,next)=>{
  bar.component?.exposed?.startLoading()
  if(whileList.includes(to.path) || localStorage.getItem('token')){
    next()
  }else{
    next('/')
  }
  
})

router.afterEach((to,from)=>{
  bar.component?.exposed?.endLoading()
})

app.mount('#app')

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