vue中原生file上传图片

    // 上传图片
    changeImg(e) {
      console.log(e, ‘1111‘)
      var that = this
      var file = e.target.files[0] || e.dataTransfer.files[0]
      var fileSize = file.size || file.fileSize
      var fileName = file.name
      var len = e.target.classList.length
      console.log(file.size, ‘2111‘)
      if (file.name.lastIndexOf(‘.‘) === -1) {
        this.$message.info(‘路径不正确‘)
        return false
      }
      var AllImgExt = ‘.jpg|.jpeg|.gif|.bmp|.png|.swf‘
      var extName = file.name.substring(file.name.lastIndexOf(‘.‘)).toLowerCase()
      if (AllImgExt.indexOf(extName + ‘|‘) === -1) {
        this.$message.info(‘非法图片格式‘)
        return false
      }
      if (fileSize < 3145728) {
        if (window.FileReader) {
          var reader = new FileReader()
          reader.readAsDataURL(file)
          reader.onload = (e) => {
            console.log(e.target + ‘img‘)
            console.log(e.target.result + ‘img‘)
            // that.$refs.imgzs.src = e.target.result
            if (len > 1) {
              that.form.wx_share_img_url = fileName
              that.formData.set(‘share_img‘, file)
              console.log(file, ‘share_img‘)
              // that.formData.set(‘share_img‘, e.target.result)
            } else {
              console.log(file, ‘list_img‘)
              that.form.extra = fileName
              that.formData.set(‘list_img‘, file)
            }
            $(‘#imgshow‘).get(0).src = e.target.result;
            that.isUploadImg = true
          }
        }
      } else {
        this.$message.info(‘图片大小超过限制‘)
        return false
      }
    }