关于javascript:下载图片-不预览

down () {

  let request = new XMLHttpRequest()  request.responseType = 'blob'  // 传入文件链接  // request.open('GET', this.tokenData.serverUrl + item.path)  request.open('GET', 'https://img1.baidu.com/it/u=467403473,3088799256&fm=26&fmt=auto')  request.onload = function () {    let url = window.URL.createObjectURL(this.response)    let a = document.createElement('a')    document.body.appendChild(a)    a.href = url    a.download = '图片'    a.click()  }  request.send()

}