Leveraging asynchronous operations in Angular can greatly enhance the performance and

Upon clicking a button, my save_data method is triggered. This method includes a code snippet shown below:

save_recording(){ 
  let formData = new FormData();
  formData.append("id", id); 

  const transcript_arr = [];
  const confidence_arr = [];

  const service_transcript = this.ServiceTranscriptData();
  const service_confidence = this.ServiceConfidenceData();

  for (var i = 0; i < service_confidence.length; i++) {
    // Code logic here
  }

  // More code goes here...
}

async ServiceTranscriptData() {  
  var trans = await this.service.getTranscriptValue();
  return trans;
}

async ServiceConfidenceData() {
  var confidence = await this.service.getConfidenceValue();
  return confidence;
}

I want to ensure that the code following the lines this.ServiceTranscriptData() and this.ServiceConfidenceData() is not executed until these async functions complete their execution.

Currently, I am encountering an error:

Property length doesn't exist on type Promise<any[]>
. For reference, you can view the screenshots https://i.sstatic.net/9nuV9.png and https://i.sstatic.net/kHVJ3.png.

If you have any suggestions or solutions to resolve this issue, I would greatly appreciate it. Thank you!

Service :

import { Injectable } from '@angular/core';
declare var webkitSpeechRecognition: any;

@Injectable({
  providedIn: 'root'
})
export class VoiceRecognitionService {

  // Class implementation.
}

Answer №1

  async save_recording() {
    const formData = new FormData();
    formData.append("id",id); 
    const transcript_arr = [];
    const confidence_arr = [];
    const service_transcript = await this.service.getTranscriptValue();
    const service_confidence = await this.service.getConfidenceValue();
    for (let i = 0; i < service_confidence.length; i++) {}
  }

Answer №2

These two functions, ServiceTranscriptData() and ServiceConfidenceData(), both return promises, so you must also await them before proceeding.

async save_recording(){ 
 ...
 const service_transcript= await this.ServiceTranscriptData();
 const service_confidence=await this.ServiceConfidenceData();
 for (var i = 0; i < service_confidence.length; i++) {
  }

}

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