vue后台返回base64图片无法显示的解决

let str = `data:image/jpg;base64,${res.imgStr}`
        this.mpId = str.replace(/[\r\n]/g, '')

let str = `data:image/jpg;base64,${res.imgStr}`
this.mpId = str.replace(/[\r\n]/g, '')

// 拍照获取图片base64
// imgsrc: base64图片资源
    refreshDataList (imgsrc) {
      let data = this.baseImg(imgsrc)
      console.log(data)
    },
// base64转图片资源
    baseImg (dataurl) {
      var arr = dataurl.split(','),
          mime = arr[0].match(/:(.*?);/)[1],
          bstr = atob(arr[1]),n = bstr.length,
          u8arr = new Uint8Array(n);
          while (n--) {
            u8arr[n] = bstr.charCodeAt(n)
          }
      return new Blob([u8arr], {type: mime})
    },