vue+elementui upload手動上傳圖片

<el-form-item label="截圖">
        <el-upload
          class="upload-demo"
          accept="image/png,image/jpg,image/jpeg"
          ref="upload"
          :file-list="fileLists"
          action="#"
          :on-change="handlePreview"
          :on-remove="handleRemove"
          list-type="picture-card"
          :limit="2"
          :on-exceed="fileExceed"
          :auto-upload="false">
          <i class="el-icon-plus"></i>
        </el-upload>
        <el-button size="small" type="success" @click="submit">確定</el-button>
      </el-form-item>

data() {
      return {
        fileLists: [],
      };
    },

handleRemove(file, fileList) {
				this.fileLists = fileList;
			},
      handlePreview(file, fileList) {
				let that = this;
        console.log(file)
				if (file.raw.type !== 'image/jpg' && file.raw.type !== 'image/png') {
					that.$message.error('圖片只能是jpg/png格式!');
					return;
				}
				if (file.raw.size > 1024 * 1024 * 2) {
					that.$message.error('上傳文件大小不能超過 2MB!');
					return;
				}
				that.fileLists = fileList;
			},
      fileExceed:function(files, fileList){
				this.$message.warning(`當前限制選擇 2 個文件，本次選擇了 ${files.length} 個文件，共選擇了 ${fileList.length} 個文件`)
			},
submit() {
console.log(this.fileLists)
}