vue如何实现实时上传文件进度条

//上传文件组件
<el-upload
        action
        :show-file-list="false"
        :before-upload="uploadFile"
>
      <el-button type="primary" :disabled="progressFlag">上传数据</el-button>
</el-upload>
//进度条组件
<div :class="progressFlag?'progress':'progress1'">
        <el-progress
                id="progress"
                 type="circle"
                 :percentage="percent"
                 :stroke-width="8"
                  :width="100"
                  :show-text="true"
                  stroke-linecap="round"
                  :format="progressFormat"
        ></el-progress>
                                
</div>

data() {
    return {
        percent:0,
        progressFlag:false,
        deg:135,
        status:this.percent<100?"":"success",//进度条组件加上状态后不显示文字
        color:[
            {color:"#fdfdfd",percentage:99},
            {color:"#ccccc",percentage:100},
        ]
    }
}

methods:{

async uploadFile(file){
        //:on-progress="uploadFile"上传时会多次调用，由于是本地，间隔较大
        let reg = /(?<=\.)[a-z]+$/g
        let fileType = file.name.match(reg)+""
        let typeArr = ["xls","xlsx","csv"]
        if(!typeArr.includes(fileType)){
            this.$message.warning("上传文件格式错误!")
            return 
        }
        let formData = new FormData()
        formData.append('file',file)
        // realtimeUploadLocal({
        //     file:formData,
        //     uid:this.$store.state.userInfo.user.uid,
        // })
        this.progressFlag = true
        await realtimeUpload(formData,this).then((res)=>{
            if(res.code == "0"){
                this.$message.success(res.data)
            }else{
                this.$message.warning(res.data)
            }
        })
        setTimeout(()=>{
            this.progressFlag = false
            // this.rotateFn(0)
            this.percent = 0
        },1000)
    },

progressFormat(percentage){
        return percentage<100?"已上传("+percentage+"%)":"上传完成"
 }

}

<style scoped lang="less">
.progress1{ display:none;}
.progress{
        display: flex;
        width: 80px;
        height: 80px;
        position: absolute;
        top: 40px;
        left: 50%;
        transform: translate(-50%, 0);
        background-color: transparent;
}

</style>