我構建了一個評論系統，允許用戶在評論中添加圖像。我試圖等到圖像上傳完成后再向 firestore 添加評論，但我的嘗試不起作用。我有一個名為photoUpload()將圖像上傳到 firebase 存儲的方法。該方法包含一個uploadTask用于獲取進度詳細信息的偵聽器。但是，在圖像上傳完成之前，我的評論已添加到數據庫中。如何延遲并等到完成后再提交評論？這是我的代碼：數據功能：  data() {    return {      text: '',      image: null,      overlayShow: false,      progress: 0,      downloadUrl: null    }  },這是我的圖片上傳任務：photoUpload() {  this.filename = uuidv4()  const storageRef = this.$fireStorage.ref()  this.photoRef = storageRef.child(    `photos/${this.userProfile.uid}/commentPhotos/${this.filename}`  )  // uploads string data to this reference's location  const uploadTask = this.photoRef.putString(this.image, 'data_url')  // set the callbacks for each event  const next = (uploadTaskSnapshot) => {    this.progress =      (uploadTaskSnapshot.bytesTransferred /        uploadTaskSnapshot.totalBytes) *      100    console.log('Upload is ' + this.progress + '% done')  }  const error = (error) => {    ...snijp...  }const complete = async () => {    // Upload completed successfully, now we can get the download URL    this.downloadUrl = await uploadTask.snapshot.ref.getDownloadURL()  }  // listens for events on this task  uploadTask.on(    // 3 callbacks available for each event    this.$fireStorageObj.TaskEvent.STATE_CHANGED,    {      next,      error,      complete    }  )}