vue-upload上传图片详细使用方法

<el-form-item label="维保打印记录:" prop="fileList">
            <!-- <el-input v-model="form.mcRecord" style="width: 350px"></el-input> -->
            <!-- list-type="picture" 上传图片的样式 -->
            <el-upload
              class="upload-demo"
              :action="upload.url"
              :on-preview="handlePreview"
              :headers="upload.headers"
              :on-remove="handleRemove"
              :on-success="handleFileSuccess"
              :file-list="fileList"
              list-type="picture"
              :limit="10"
              :on-exceed="handleExceed"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件,且不超过500kb
              </div>
            </el-upload>
</el-form-item>

// 上传图片成功之后存储地方
      fileList: [],
      // 图片上传地址，和请求头数据
      upload: {
        // 设置上传的请求头部
        headers: { token: getToken(), "tenant-id": getTenantId() },
        // 上传的地址
        url: process.env.VUE_APP_BASE_API + "/media/upload/coursefile",
      },

// 文件上传成功钩子
    handleFileSuccess(response, file, fileList) {
      console.log("response", response);
      console.log("file", file);
      console.log("fileList", fileList);
      let x = {};
      x.name = response.filename;
      x.url = response.url;
      x.id = response.id;
      console.log("上传图片", x);
      this.fileList.push(x);
    },
    // 点击已上传文件右上角删除钩子
    handleRemove(file, fileList) {
      // console.log("id", file.id);
      console.log("删除之后", fileList);
      // const x = this.fileList.findIndex((v) => v.id == file.id);
      // console.log("删除下标", x);
      // this.fileList.splice(x, 1);
      this.fileList = fileList;
      console.log("处理过数据", this.fileList);
    },
    // 文件上传数量超过设置数量
    handleExceed(files, fileList) {
      this.$message.warning(`最多只能选择10张图片${fileList.length} 个文件`);
    },
    // 点击文件列表中已上传的文件时的钩子
    handlePreview(file) {
      console.log(file);
      const image = new Image();
      image.src = file.url;
      image.onload = () => {
        // 创建弹出层
        console.log("执行了");
        const previewContainer = document.createElement("div");
        previewContainer.style.position = "fixed";
        previewContainer.style.top = 0;
        previewContainer.style.bottom = 0;
        previewContainer.style.left = 0;
        previewContainer.style.right = 0;
        previewContainer.style.zIndex = 99999;
        previewContainer.style.backgroundColor = "rgba(0,0,0,0.8)";
        previewContainer.style.display = "flex";
        previewContainer.style.justifyContent = "center";
        previewContainer.style.alignItems = "center";
        document.body.appendChild(previewContainer);
        // 在弹出层中添加图片
        const previewImage = document.createElement("img");
        previewImage.src = file.url;
        previewImage.style.maxWidth = "80%";
        previewImage.style.maxHeight = "80%";
        previewContainer.appendChild(previewImage);
        // 点击弹出层，关闭预览
        previewContainer.addEventListener("click", () => {
          document.body.removeChild(previewContainer);
        });
      };
    },