Guide to verifying the upcoming behavior subject data in Angular 8

I am facing an issue where I am attempting to access the next value of a BehaviorSubject in multiple components using a service. Although I can display the value in the UI using {{ interpolation }}, I am unable to see it in the console.log. Can someone help me understand why this is happening and provide a solution?

Demo: https://stackblitz.com/edit/angular6-bootstrap4-navbar-ejavrr?file=src%2Fapp%2Fcontent%2Fcontent.component.ts

content.component.ts:

geteventMsg; 
  constructor(public commonservice:CommonService) {  } 
  ngOnInit(){  
    this.commonservice.currentMsg.subscribe(geteventMsg => this.geteventMsg = geteventMsg);  
    console.log("Current message=",this.geteventMsg);   //Not coming next value
  }

header.component.ts:

setMessage(){
      let count=this.cnt++;
      this.commonservice.changeMessage(count);  
   }

common.service.ts:

   private messageSrc = new BehaviorSubject(0);
   currentMsg = this.messageSrc.asObservable(); 
  
   changeMessage(message: number) {
    this.messageSrc.next(message);
   }

Answer №1

Basic :

initialize(){  
    this.customservice.latestData.subscribe(receiveData => { 
      this.receiveData = receiveData;
      console.log("Received data=",this.receiveData);   
    });   
  }

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Trouble encountered with uploading files using Multer

I am facing an issue with uploading images on a website that is built using React. The problem seems to be related to the backend Node.js code. Code: const multer = require("multer"); // Check if the directory exists, if not, create it const di ...

Error: 'process' is not defined in this TypeScript environment

Encountering a typescript error while setting up a new project with express+ typescript - unable to find the name 'process'https://i.stack.imgur.com/gyIq0.png package.json "dependencies": { "express": "^4.16.4", "nodemon": "^1.18.7", ...

Making a synchronous call to a web API using JQuery

Understanding JQuery promises and deferred objects has been a bit of a challenge for me, so please bear with me. I should also mention that my application is built using React, Typescript, and ES6. Let's imagine we have an array of objects: [{ Objec ...

There are no HTTP methods being exported in this specific file. Remember to export a named export for each individual HTTP method

Currently, I am working on a React.js/Next.js project that incorporates Google reCAPTCHA. The frontend appears to be functioning properly as I have implemented print statements throughout the code. However, I am encountering an error in the backend display ...

Achieving VS Code/typescript autocomplete functionality without the need to import the library

When a module (for example, moment.js, knockout, or big.js) is added with a <script> tag like this: <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.js"> </script> that defines a global property (for instance ...

Is it possible for Visual Studio Code to create type declarations?

One of my tricks for quickly obtaining typings involves deriving them from actual data: https://i.stack.imgur.com/EPtMm.png I typically use a snippet like this: const ParcelFeatureTypeInstance = {"displayFieldName":"NAMECO","fieldAliases":{"PIN":"PIN / ...

When null is assigned to a type in Typescript, it does not result in an error being triggered

Could someone enlighten me on why this code is not causing an error? import { Injectable } from '@angular/core'; interface Animal{ name: string; } @Injectable() export class AnimalService { lion: Animal = null; constructor() {} get(){ ...

Can anyone provide a webpack configuration to package a webpack plugin together?

I'm in the process of developing a webpack plugin using typescript. Before I can publish it on NPM, I need to bundle the plugin code. However, I've encountered an exception stating that my plugin class is not a constructor. Below is the director ...

Ways to implement logging in an NPM package without the need for a specific logging library

Currently, I am in the process of developing a company npm package using TypeScript and transferring existing code to it. Within the existing code, there are instances of console.log, console.warn, and console.error statements, as shown below: try { c ...

Show detailed information in a table cell containing various arrays using AngularJS

After integrating d3.js into my code, I now have an array with key-value pairs. Each team is assigned a key and its corresponding cost is the value. When I check the console log, it looks like this: Console.log for key and value Rate for current month [{ ...

Challenges encountered while setting up Hotjar integration in Next.js using Typescript

I am encountering issues with initializing hotjar in my Next.js and TypeScript application using react-hotjar version 6.0.0. The steps I have taken so far are: In the file _app.tsx I have imported it using import { hotjar } from 'react-hotjar' ...

The clash between the definitions of identifiers in this file and another (@types/jasmine) is causing error TS6200

While trying to build my project with Angular CLI, I am encountering the following error message: ERROR in ../my-app/node_modules/@types/jasmine/index.d.ts(18,1): error TS6200: Definitions of the following identifiers conflict with those in another file: ...

Troubleshooting a Missing Angular (8) Pipe Error in Your Ionic 4 Application

Despite seeing similar questions posted here, none have provided a solution to my issue. I believe I am implementing it correctly, but clearly something is not right. In the app I'm developing with Ionic 4, I need to add a key to a URL in a gallery. ...

Exploring the world of Unicode in Angular

I need to search for pokemon and retrieve all Pokémon results (with the accent included) This is my array: let games = ['The Legend of Zelda', 'Pokémon', 'Chrono Trigger'] This is how I am attempting to do it: Using HTML ...

PhantomJS version 2.1.1 encountered an error on a Windows 7 system, displaying "ReferenceError: Map variable not found."

I've been utilizing the "MVC ASP.NET Core with Angular" template. I'm attempting to incorporate phantomJS and execute the tests, but encountering the following errors: ERROR in [at-loader] ..\\node_modules\zone.js\dist&bs ...

Is it possible to loop through each row in a table using Cypress and execute the same actions on every iteration?

I have a frontend built with html/typescript that features a table of variable length containing action buttons in one of the columns. I am looking to create a Cypress test that will click on the first button of the first row, carry out a specific task, an ...

Building a TypeScript Rest API with efficient routing, controllers, and classes for seamless management

I have been working on transitioning a Node project to TypeScript using Express and CoreModel. In my original setup, the structure looked like this: to manage users accountRouter <- accountController <- User (Class) <- CoreModel (parent Class o ...

Is it possible to retrieve a value obtained through Request.Form?

Within my Frontend, I am passing an Object with a PersonId and a FormData object. const formData = new FormData(); for (let file of files){ formData.append(file.name, file,); } formData.append('currentId',this.UserId.toString()); const upl ...

Issues encountered when trying to upload images to Firestore Storage

I am attempting to upload an image and store its URL in a Firestore document. To achieve this, I have the following code snippet: This function uses the device camera to capture the photo. selectImage(): Promise<any> { return new Promise(resolv ...

Incorporating an external TypeScript script into JavaScript

If I have a TypeScript file named test.ts containing the code below: private method(){ //some operations } How can I access the "method" function within a JavaScript file? ...