创建image-upload组件

<template>
  <el-upload
    class="avatar-uploader"
    action=""
    :show-file-list="false"
    :before-upload="beforeAvatarUpload"
  >
    <!-- (自动上传)action是上传地址   -->
    <img v-if="value" :src="value" class="avatar">
    <i v-else class="el-icon-plus avatar-uploader-icon" />
  </el-upload>
</template>

<script>
export default {
  props: {
    value: {
      type: String,
      default: ''
    }
  },
  methods: {
    // 检查函数 判断文件的类型还有大小 return  true(继续上传)/false(停止上传)
    beforeAvatarUpload(file) {
      // jpeg png gif bmp
      const isJPG = ['image/jpeg', 'image/png', 'image/gif', 'image/bmp'].includes(file.type)
      const isLt2M = file.size / 1024 / 1024 < 5 // 5M

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG PNG GIF BMP 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 5MB!')
      }
      return isJPG && isLt2M
    }
  }
}
</script>

<style>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
</style>

在父组件中应用

 <el-row>
   <el-col :span="12">
        <el-form-item label="员工头像">
          <!-- 放置上传图片 -->
          <image-upload v-model="userInfo.staffPhoto"></image-upload>
        </el-form-item>
      </el-col>
  </el-row>
  <script>
    userInfo: {
       staffPhoto:"",
       //测图片是否能看到
       // staffPhoto: "https://img1.baidu.com/it/u=3539595421,754041626&fm=253&app=138&size=w931&n=0&f=JPEG&fmt=auto?sec=1701622800&t=380f959f8a27d029f45fb30c18bda852",
         },
   </script>