提供一个封装element组件库的带标题的图片上传组件示例

好的，我可以回答这个问题。以下是一个封装element组件库的带标题的图片上传组件示例：

<template>
  <div>
    <el-upload
      class="upload-demo"
      action="/upload"
      :on-success="handleSuccess"
      :before-upload="beforeUpload"
      :file-list="fileList"
      :headers="headers"
      :data="formData"
      :multiple="false"
      :show-file-list="false"
    >
      <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>
    <div class="preview">
      <img v-if="imageUrl" :src="imageUrl" alt="" />
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      fileList: [],
      imageUrl: '',
      headers: {
        Authorization: 'Bearer ' + localStorage.getItem('token'),
      },
      formData: {
        type: 'avatar',
      },
    };
  },
  methods: {
    handleSuccess(response, file, fileList) {
      this.imageUrl = URL.createObjectURL(file.raw);
    },
    beforeUpload(file) {
      const isJPG = file.type === 'image/jpeg' || file.type === 'image/png';
      const isLt500K = file.size / 1024 < 500;

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG/PNG 格式!');
      }
      if (!isLt500K) {
        this.$message.error('上传头像图片大小不能超过 500KB!');
      }
      return isJPG && isLt500K;
    },
  },
};
</script>

<style scoped>
.upload-demo {
  display: inline-block;
  margin-right: 20px;
}
.preview {
  margin-top: 20px;
}
.preview img {
  max-width: 200px;
}
</style>