问谷歌选择器GAPI.js不工作

EN

  const view = new google.picker.View(google.picker.ViewId.DOCS);
  const picker = new google.picker.PickerBuilder()
        .enableFeature(google.picker.Feature.NAV_HIDDEN)
        .setAppId(this.appId)
        .setOAuthToken(this.oAuthToken)
        .addView(view)
        .addView(new google.picker.DocsUploadView())
        .setCallback(this.pickerCallback.bind(this))
        .build();
  picker.setVisible(true);