问云开发文件存储示例代码为什么跑不通？

const tcb = require('tcb-js-sdk');

const app = tcb.init({
  env: 'xxxx-yyy'
});

const result = await app.uploadFile({
  cloudPath: 'test-admin.jpeg',
  filePath: document.getElementById('file').files[0],
  onUploadProgress: function(progressEvent) {
    console.log(progressEvent);
    var percentCompleted = Math.round(
      (progressEvent.loaded * 100) / progressEvent.total
    );
  }
});