进度条

进度条

//get请求一般用来获取下载进度
xhr.onprogress = function (event) {var divStatus = document.getElementById("status");if (event.lengthComputable) {divStatus.innerHTML = "Recived" + event.loaded + " of " + event.total + " bytes";}
}
//post一般用来获取上传进度
xhr.upload.onprogress = function(e) {if (e.lengthComputable) {console.log(e.loaded / e.total * 100)}
}

/*let lengthComputable = true;//进度信息是否可用
let loaded = 25;//已经接收的字节数
let total = 100;//预期字节数
if (lengthComputable) {
  this.progress = (loaded / total * 100);
  if (this.progress===100) {
    this.dialogVisible = true;//显示设备版本更新完成
  }
}*/