7 Key Reasons To Choose Angular for Mobile App Development Project Posted on 29 December 2022 by Ankur Akvaliya Nowadays, you’ll come across a list of mobile app development languages and also robust frameworks for making the development process much smoother. Angular is one of the leading open-source front-end development frameworks that primarily focuses on single-page applications. And guess what, Angular plays a vital role in developing mobile apps for your business requirements. So, you’ll ask me, a big WHY? We’ve gathered a list of top reasons to select Angular for mobile app development for your business needs. What is Angular? Angular is one of the best Typescript-based frameworks that plays an essential role in building robust web apps like PayPal, Netflix, and many other websites built using the Angular framework. The Angular framework is a user-interactive platform that makes it a simplified process to design and build web and angular mobile app for your business. In addition, the framework plays an important role in dealing with front-end development. Do you know that there are around 2,439,149 downloads of the Angular framework for November 2022? This number is constantly increasing on an hourly basis. Now let’s explore the top reasons to use Angular for mobile app development for your business requirements. Are You In Deep Need Of Angular Development Services? Your search ends here as we have a team of talented developers who are proficient in handling clients to meet their expectations. Contact Us Top 7 Reasons For Using Angular for Mobile App Development The Angular framework plays an essential role in developing mobile applications for your business needs. I hope you’re now clear with the concept of what is Angular. You can avail the benefits of using AngularJS for mobile app development process for various different reasons, as depicted below. Angular is Pretty Easy to Use For Developing Mobile Apps AngularJS is the most popular framework for web and mobile app development. It does not require any specific or advanced tools for creating feature-rich and industry-best mobile app solutions for your business needs. You’ll come across many JavaScript frameworks that will help you build robust mobile app solutions for your needs, but AngularJS is equipped with less code. Obviously, it’s going to save more time and effort for AngularJS developers. Angular Strictly Supports Code Reusability If you have written the code in the Angular framework, you can efficiently use it in other mobile app development processes. Quite interesting? In simple words, we can say that you can code for one mobile technology and reuse the same code with the other technology. It’s one of the best and most unique features of the Angular framework. And that’s what makes the possible reason for you to select the framework that works for Android and iOS applications. Angular codes are entirely flexible, and their proper implementation can be efficiently done anywhere per your business requirement for mobile application development. The most exciting part of the Angular framework is that you can efficiently implement mobile apps for your business needs. Moreover, this framework is solely responsible for giving interactive touch to the codes to make your app’s user interface world-class. In the Angular Talks March 2022, Haim Agami – Turjeman shared his expert opinion on how to automate the development process to ensure code maintainability. Supports Fewer Code and Inspiring Declarative Features Angular is one such robust framework that typically requires fewer codes to accomplish the mobile app development process for your business needs. So, it is amongst the most sought software used for mobile apps. Moreover, you’ll come across multiple libraries that you can quickly implement in AngularJS development services that you can use as declarative code. So, you can eventually make use of the software to grab the advantages of various libraries while developing a robust and highly-efficient mobile application. And if you ask me, as a developer, Angular is the most-preferred framework to deal with a stress-free coding experience. We crafted a telemedicine platform that becomes a boon to empower physicians, health institutions, and patients globally. View Our Work Angular Application Architecture For Angular, mobile app development process typically uses both MVVM and MVC architectures. With the help of this powerful front-end framework, you can efficiently perform the integration of varied features in your business applications. It primarily depends on your business requirements and how you should opt for the best application architecture. However, you must ensure that your selected architecture must be helpful to you in developing a robust, efficient, secure, and feature-rich app. Angular application architecture is one inspiring reason that could help you achieve the desired level of flawlessness. You should hire AngularJS developers from a reputed organization where you can fulfil all your needs with the right set of skills. Angular’s Big Community Support To Help You Out Angular is an open-source and typescript-based platform with extensive customer support. You can easily avail the support for any complexity you’ve achieved in your coding by simply troubleshooting the issue. Angular’s extensive community support is the best example for getting help for any business software solutions for your needs. So, if you’re stuck on any issue, visit the Angular community, and you’ll get instant support for your queries. Angular’s Data Binding Feature is Just Inspiring What’s the crucial factor that makes the mobile app development process more efficient with Angular? It’s a data-binding process and plays a vital role in designing and developing a powerful mobile app for your business needs. With the continuous evolution of trending technologies, it becomes essential for you to keep track of them. Otherwise, it would help if you were ready for a further upgrade. Data binding is entirely dependent on various Angular’s in-built libraries. So, it would help if you had a proper understanding of such libraries and frameworks to make your AngularJS Development Services more accessible, as expected. High-Performance Ranking For Your Mobile App Angular is a typescript-based framework that is well-known for building mobile apps which are efficient and supports next-gen features. Moreover, it is quite easy for you to develop applications right from the scratch and within a short period of time. Being one of the top-rated front-end development frameworks, Angular is solely responsible for making things easier with the Angular best Practices. Rather than dealing with the workflow’s complexity for the whole development team, this feature-rich platform offers well-established practices to accomplish results with less effort and more precision. The mobile applications developed using the Angular framework are highly performant and work smoothly as per your business needs. Develop Single-Page Applications from Albiorix’s Angular Stars Our talented Angular developers are proficient in designing and building front-end applications for all your business needs. Contact Us Mobile Apps You Can Build With Angular Angular is a versatile framework that enables developers to create a wide range of angular mobile app. Some of the types of apps you can build with Angular include Single Page Applications (SPA): Angular is widely known for its capabilities in building powerful and interactive SPAs. SPAs are web applications that load a single HTML page and dynamically update the content as the user interacts with the app, without the need to reload the entire page. Enterprise Web Apps:Angular is a popular choice for developing enterprise-level web applications. These applications are typically large-scale, complex, and require robust features to handle various business processes. Progressive Web Applications (PWA): Angular has extensive support for building Progressive Web Applications (PWA). PWAs are web applications that leverage modern web technologies to deliver app-like experiences to users. With Angular, developers can create PWAs that are responsive, reliable, and installable on users’ devices. Server-side Rendered (SSR) Apps: Angular provides support for Server-side Rendering (SSR), also known as Angular Universal. SSR is a technique where the initial rendering of the web application is performed on the server, and the pre-rendered content is sent to the client. Social Media Apps: Social media apps require real-time interactivity and dynamic content updates. Angular’s ability to create Single Page Applications (SPAs) with two-way data binding makes it well-suited for building responsive and interactive social media platforms. E-commerce Apps: E-commerce apps demand a smooth user interface and efficient handling of product catalogs, shopping carts, and payment processing. Angular’s features, such as client-side routing, forms handling, and dependency injection, make it an excellent choice for building feature-rich e-commerce applications. Business Productivity Apps: Business productivity apps often involve data manipulation, analytics, and collaboration features. Angular’s robust data binding and built-in directives enable developers to create data-driven applications that update in real-time, helping users stay productive. Gaming Apps: While Angular is not primarily designed for gaming applications, it can still be used for certain aspects of game development. For instance, Angular can be used to create the frontend user interface of a gaming app, displaying game menus, user profiles, and settings. Industry-Based angular Mobile App Development Angular has been adopted by various industries for mobile and web app development due to its robust features and benefits. Some prominent examples angular for mobile and web include Banking and Finance: Major financial institutions use Angular for secure and reliable online banking platforms. Education: Educational institutions leverage Angular to create e-learning portals and interactive learning applications. Entertainment: Media and entertainment companies adopt Angular to build content streaming and distribution platforms. Real Estate: Angular is used to develop property listing and real estate management applications. Transportation: Logistics and transportation companies rely on Angular for tracking and fleet management apps. Health and Fitness: Fitness centers and health-related startups utilize Angular to create personalized health tracking apps. Who Uses Angular? Angular is widely adopted by organizations of varying sizes across the globe. Some notable companies and projects that use Angular include. You’ll see best websites Using Angular framework Google: As the creator of Angular, Google implements the framework in numerous products and internal tools. Microsoft: Microsoft employs Angular in its applications and platforms to deliver seamless user experiences. IBM: IBM uses Angular for developing enterprise-grade web and mobile applications. Forbes: The popular media company utilizes Angular for its web and mobile platforms to engage readers. Upwork: The freelancing platform leverages Angular for its responsive and interactive interface. WhatsApp Web: The web version of WhatsApp is built with Angular, providing users with browser-based access to their messages. Conclusion Searching for the perfect development tool for building mobile apps in this competitive technological world is complex. But after analyzing this entire article, Angular is the best framework we can consider a winner of the mobile app development process. And if you’re looking for the Angular mobile app development process, consult Albiorix today as we follow the flexible engagement model to provide you with the best possible outcomes.
Angular Promise vs Observable: Ultimate Differences You Must Know Posted on 28 December 2022 by Ankur Akvaliya JavaScript strictly follows the asynchronous concurrent language and its engine instantly moves to execute the next statement without waiting for the concurrent statement to finish. Such a concept is called the asynchronous function, and you need to deal with the callbacks approach. So, I know it’s a challenging task to manage the codes, making the callback hell. Angular Promises and Observables are the one-stop solutions to overcome such situations. Their implementations help us deal with that asynchronous code more cleanly. However, they have different APIs, and their motivation is slightly different. And we have come up with an article that depicts the technical difference between Angular promise vs Observable. What is Promise in Angular? One of the best ways to execute asynchronous functions in your application that typically uses callbacks is opting for promise in Angular development. The promise in Angular takes place while emitting and completing (resolving or rejecting) one value at a time. So if you’re using an Angular promise, it becomes easy for you to emit a single event from the API. Then, the controller’s (directive) sole responsibility is to register up to three callbacks – success, error, and notifications. Generally, four states of the Angular Promise are available for your Angular application development. fulfilled rejected pending settled Remember that Angular Promise is not active as Observable. It means AngularJS developers are not allowed to cancel any specific event once it starts. So, passing the callback to the Promise constructor (controller or directive) will provide you with two options: either resolve or reject the function, depending on your needs. Get Custom-Tailored Web App Development Solutions For Your Business Needs We strictly adhere to the standard software development lifecycle to provide the best possible IT solutions for your business success. Contact Us What is an Observable in Angular? Observables are preferable to Angular promise as they allow you to run functions asynchronously and synchronously. Furthermore, it means that you can deliver multiple values over time with the help of Observables. Such values are actively responsible for handling 0, 1, or multiple events, and that too by using the same API for every event. The excellent part of Angular Observables is the number of operators actively simplifying coding, including retry(), replay(), map, forEach, reduce and others. With the help of Observables, the first thing that you need to perform is to have a subscription to start emitting values. If you do not perform this step, it’s just a blueprint of code responsible for handling future emits. Related Post: Resolver in Angular Angular Promise vs Observable: Differences You Must Know Now, it’s high time to see the technical differences between Angular Promise vs Observable. I have gathered the list of examples to clarify doubts about the difference between Angular Promise and Observables. Angular Promise handles one value; Observables handles multiple values. One of the significant differences between Observable vs Angular Promise is that you are now allowed to change the fulfilled value. So instead, you can just emit (either reject or resolver) a single value for your Angular application. To understand this concept, you need to have basic information of what is Angular. And if I talk about Observables, you can freely emit multiple results. The subscriber will receive results until the observer is completed or unsubscribed. Let’s see an example of handling values in terms of Angular Promise vs Observable. Copy // Promises const x = new Promise((resolve) => { setInterval(() => { // ✅ when resolve is called, the promise will become // fullfilled and it's value won't ever change resolve(Math.random() * 10) }, 3000); }); // Observables const observable$ = rxjs.Observable.create((observer) => { // ✅ you can pass multiple values by using `next` method observer.next(1); observer.next(2); observer.next(3); observer.complete(); }) // ✅ base will be receiving values untils it's completed observable$ .subscribe( v => console.log(v), err => console.log(err), done => console.log("completed") ); Observables are responsive tools that quickly listen to data streams. In addition, there exists a bidirectional kind of Observable: Subjects, and they are a perfect use case for those web sockets. The RxJS library helps you to deal with shipping with a thin wrapper on web sockets. import { webSocket } from “rxjs/webSocket”; We crafted web and mobile application that allows users to easily search for a car by entering the essential car options, colour specifications, and location. View Our Project Observable subscriptions are cancellable; promises aren’t Once an Angular promise is started, it seems impossible to cancel the event. So instead, the callback passed to the Promise constructor is solely responsible for resolving or rejecting the promise. The subscriber reacts to the result once fired; hence, it’s completely passive. Compared to Angular Promise, Observables are less passive and on subscribe creation process, you can quickly opt out of the observer at any time. So, if you are no longer interested in getting the response, you can opt for such scenarios. The best example is when a user leaves a page. Yes, you’ll find multiple ways to cancel/complete subscribers. Some of the common one to cancel subscribers are mentioned below: unsubscribe: It allows you to cancel the subscription from the Observation manually. take: It enables you to take number X of elements and easily cancel the subscription process. takeUntil: It makes it easy for you to take values until the passed Observable emits any value. Let’s go through an example to demonstrate it. Copy // ✅ 1. Cancelling by using the unsubscribe method const observable1$ = rxjs.interval(1000); const subscription1$ = observable1$ .subscribe(x => console.log(x)); subscription1$.unsubscribe(); // ✅ 2. Cancelling by taking a number of elements const observable2$ = rxjs.interval(1000); observable2$ .pipe(rxjs.operators.take(5)) .subscribe(x => console.log(x)); // ✅ 3. Conditionally stop listineing for more elements const subject3$ = new rxjs.Subject(); const observable3$ = rxjs.interval(1000); observable3$ .pipe(rxjs.operators.takeUntil(subject3$)) .subscribe(x => { console.log(x); if (Math.random() > 0.5) { subject3$.next(1); subject3$.complete(); console.log('complete'); } }); The operators of Observable are essential as it allows you to compose declaratively complex asynchronous operations quickly. Planning To Develop a Robust Single-Page Application? Our Angular development team has core expertise in designing and building feature-rich applications for all your business needs. Contact Us Eager vs lazy execution In the discussion about Angular Promise vs Observable, we need to understand the process of execution. And that is done by using the Eager and Lazy execution method. Let’s put it simply. You can execute the Angular Promises eagerly. On the other hand, Observables are executed lazily. What is Lazy and Eager execution? Eager: It allows you to execute the Promise callback, especially at the constructor level. Lazy: The Producer function will only trigger after a subscription is created for that Observable. Otherwise, it will stay idle. I’ll make it easier for you by demonstrating it with a good example. Copy const foo = new Promise((resolve) => { console.log('1. Callback execution'); resolve(true); }); foo.then(() => { console.log('2. Promise resolution'); }); console.log('3. Pre exit method statement'); // ✅ console output // 1. Callback execution // 3. Pre exit method statement // 2. Promise resolution const observable$ = new rxjs.Observable(observer => { console.log('1. Execution of observable body'); observer.next(1); observer.complete(); }); console.log('2. Pre Subscribe statement'); observable$.subscribe(() => { console.log('3. Execution of subscribe callback') }); // ✅ console output // 2. Pre Subscribe statement // 1. Execution of observable body // 3. Execution of subscribe callback The above example depicts the sequence that typically occurs: 1. Callback execution and 1. Execution of observable body. Runtime execution Once ES Promises enters the resolved state, it becomes pretty easy for you to queue the callback in the microtask queue. Simply put, the execution takes place after the current macro task has been completed. Let’s see an example: Copy console.log('1. Start'); setTimeout(() => { console.log('2. Timeout callback') }, 0); Promise.resolve().then(() => { console.log('3. Promise callback') }); console.log('4. End'); // ✅ outputs // 1. Start // 4. End // 3. Promise callback // 2. Timeout callback You can’t change the above behavior. Related Post: Angular Ivy Observables enable you to effortlessly fine-tune the runtime execution by strictly using schedulers. The primary role of a scheduler is to control the state, especially when a subscription starts and you receive notifications for the same. null: You’ll receive notifications synchronously and recursively by default. queueScheduler: It allows you to schedule quickly on a queue in the current event frame. asapScheduler: You can efficiently schedule it on the microtask queue. And also, it uses the same queue as promises use. asyncScheduler: This concept is just the same as scheduling a task using setInterval. So, you need to schedule it in the macro task queue. animationFrameScheduler: relies on requestAnimationFrame API. I’ll demonstrate an example by using asapScheduler: Copy const observable1$ = rxjs.interval(1000) // ✅ using the asapScheduler scheduler .pipe(rxjs.operators.observeOn(rxjs.asapScheduler)); const subscription1$ = observable1$ .subscribe(x => console.log(x)); Interoperability So, we have seen a lot of differences between Angular Promise and Observables. But the biggest question here is whether we can use both together. Or do we have to select only one of them? Well, the answer is No. Observables can easily created from Promise, and you can efficiently drop Observable into a Promise. Promises take only one value; you have to choose if you want the first or last value to be dumped on the Promise. And if I talk about the rxjs library, it provides you with the firstValueFrom and lastValueFrom for that particular use case. Let me demonstrate you with a simple example. Copy // ✅ Observable -> Promise const source$ = rxjs.interval(2000).pipe(rxjs.operators.take(10)); // toPromise is deprecated in favor of firstValueFrom and lastValueFrom // outputs 9 const result = await source$.toPromise(); // ✅ Promise -> Observable const promise = Promise.resolve(10); rxjs.from(promise) // outputs 10 .subscribe(item => console.log(item)); Conclusion I hope you clearly understand the technical difference between Angular Promise and Observable. It entirely depends on your business use case on when to use one or the other. But they are going to play a vast role in solving the async paradigm in JavaScript. Moreover, observables are cost-effective as the Browser does not natively support them. If you’re planning to develop a robust web application using the Angular framework, we are a renowned AngularJS development company. We have a team of Angular developers who are proficient in providing the best possible web app solutions for your business needs.
Why We Use Angular? 15 Reasons to Use Angular For Web Development in 2023 Posted on 28 November 2022 by Ankur Akvaliya Angular is one of the leading front-end frameworks used explicitly for developing single-page applications. However, Angular is not just a limited framework; it comes up with a bundle of benefits that helps developers and business owners make websites secure and robust. In this technological and advanced world, the concept of web application development is now taking a giant leap. Moreover, the user experience is essential for the developers to take care of. Compared to other front-end frameworks, Angular is one such framework that has multiple options and a great developer community that is improving daily. In this article, you’ll come across the basic concept of why we use Angular for web application development. What is Angular Programming? Angular is a framework that utilizes JavaScript-based TypeScript programming language. In 2010, the Angular developer community initiated the framework. If we talk about the history of Angular, AngularJS is the first version. While version 2+ is known by the name Angular rather than AngularJS. AngularJS and Angular are both frameworks designed explicitly for designing and building robust web applications for your business needs. However, there exist differences between Angular vs. AngularJS. An Angular Universal program is a community-driven program to enlarge the core API from Angular to assist any developer in performing this rendering of Angular apps in diverse situations. Before we start to understand the concept of “Why we use Angular?”, we need to understand the basics of the Angular framework. What is Angular? Angular, a framework and platform written explicitly in TypeScript, is used for building SPAs employing TypeScript and HTML template language. In technical words, Angular utilizes optional and principal functionality by collectively using TypeScript libraries and resources. The architecture relies on specific essential Angular concepts. We Help You Build Single-Page Applications for All Business Verticals Albiorix is a top-rated Angular development company that has a team of talented developers who strive to provide the best optimum web app solutions. Contact Us Top 15 Reasons To Use Angular For Web Application Development After exploring the concept of what is Angular, we can say for sure that Angular is a framework that is beneficial to you in different ways. If you ask me, why we use Angular, the following parameters depict the best reason for using Angular for web app development. Two-way Data Binding As compared to other front-end frameworks, Angular is one such framework that provides a two-way data binding approach. With this approach, once the Angular developers make any changes to the View, the data automatically gets updated and vice versa. Data binding in Angular applications is essential as the developers need not worry about keeping track of the variables—angular handles such processes, making the development and testing more straightforward. Streamlined MVC Architecture Angular typically follows a well-defined structure that makes it easy for developers to develop Angular applications from scratch. In addition, angular utilizes MVC architecture to make it easier for developers to deal with web application development. Angular framework separates the model from the view and brings convenience to the developers to perform data binding. Moreover, the framework is the best option for developing large and complex projects. With its MVC approach, the developers can quickly deal with various parts of an application, making development and testing much more accessible. Quick App Loading The Angular community has considered the application performance in mind before making its official launch. As a result, it’s fast and efficient, making it an excellent choice for high website traffic. The Angular framework is an excellent selection for public-facing websites. In addition, angular’s performance optimizations make it ideal for high-traffic websites. SEO-Friendly Framework After deploying the web application, what’s the next step that business owners need to perform? It’s increasing the user traffic on the website. To make it easy for them, Angular is an SEO-friendly framework. So, you do not need to worry about website ranking on search engines. With its built-in SEO features, you can efficiently improve the performance of your business website. Still, if you find any query in finding the best Angular developers for your business needs, you can hire Angular developers. You can even consult a top-rated Angular development company to get the best optimum IT solutions for your needs. Faster Development With its two-way data binding and simplified MVC approach, the Angular framework is the perfect choice for web application development. Moreover, it is solely responsible for enhancing the development speed of Angular applications. Angular coding is relatively simple and easy to understand, making the speedy development process. It is the perfect choice for the developers who are explicitly working with deadlines or need to release the website quickly — since you can do it more rapidly with Angular. Develop User-Friendly Web Application For Your Business Albiorix is an AngularJS development company that helps you build customized web solutions to meet your perfect business needs. Contact Us Directives Directives, the essential aspect of Angular applications, are nothing but a simple extension to HTML. Directives make it easy for developers to design and build web applications with minimized codes. Gives Structure to Your App Angular is a framework that typically follows a well-defined coding structure for your application. Therefore, it is beneficial for developers to perform clean coding for the entire Angular application efficiently. The Angular framework is the best alternative for large projects. Angular’s structure makes it easier to work on and maintain larger projects. Backed by Google, Angular has a large developer community that strives to provide the perfect solution for all your Angular application needs. So, if you ever get stuck in the project development process, you can easily find help online to develop a leading website. Templates Angular templates make it easy for Angular developers to design and build web applications for your business needs. Templates include HTML, JavaScript, and CSS pre-compiled into the framework for you. Managing your project’s resources becomes relatively easy when dealing with the Angular framework. Angular Testing The AngularJS frameworks is equipped with enterprise-level testing functionality. As a result, it is the preferred choice for large and high-performance web applications. This angular feature has become a boon for many developers as it allows them to perform various unit and integration tests efficiently. Moreover, the Angular testing approach is the best option for you if you are specifically working on deadlines or need to release your business website quickly — since you can do it more rapidly with Angular. Improved Flexibility Angular comes up with improved flexibility functionality, making it an excellent choice for developers to deal with large applications efficiently. Angular uses JavaScript and HTML to create single-page apps that can be easily updated without reloading the entire web page. It is valuable because you don’t have to worry about refreshing your browser whenever you change your code — the changes will automatically be updated on the page. Client-Side Solution The Angular framework typically follows a client-side solution approach. With the help of this approach, the developers can easily design and build web applications per the business needs. In simple words, we can say that the entire Angular code runs on the user’s computer instead of on the server. Therefore, it will make Angular a good choice if you want more control over the project and its functions. Supported by Google The exciting part of the Angular framework is that Google supports it. With its active support for Long-Term Support (LTS), Angular makes it easy for the developers to scale up enterprise-based application development. Do you know that big brands like Netflix, Gmail, YouTube TV, Upwork and others use the Angular framework? Angular Material With the help of Angular Material, the developers can easily create and integrate User Interface (UI) components with different element compilations. Moreover, the developers can use such Angular material to deal with various reusable and customized UI components like Cards, Inputs, Data Tables, Datepickers, and much more. Multiple Filters Angular has various filters available for developers that can help them to provide a clean and efficient way to organize your project. In addition, Angular is the best choice for developers to deal with multiple views without complexities. The developers can easily manage the Angular application with multiple views as it provides an effective system for filtering data to the right place. Inbuilt CLI Angular is framed with an inbuilt command-line interface (CLI), making it easy for developers to initialize new projects. Angular CLI makes the work more accessible for the developers to build new applications irrespective of setting up the entire project from scratch. Just give the command “ng new”, and you are ready to start with a new project within a few seconds. We designed an online car-buying site that allows users to buy a new car with varied features like financing, and leasing, and even supports home delivery. View our Project Why Angular is the Best For Building Web App Development? Angular is the preferred choice for both business owners as well as developers. Business owners can easily enhance the performance of their business websites. On the other hand, developers find it convenient in designing and building web applications. Moreover, the Angular framework is solely responsible for loading web apps faster as compared to other front-end frameworks. To develop a robust and secure web application for your business needs, you must consult an AngularJS development company where you can even hire Angular developers.
What is Promise in Angular Development? Posted on 18 November 2022 by Ankur Akvaliya JavaScript is a programming language created to add interactivity to web pages. However, in JavaScript coding, the developers find it quite challenging to deal with the callback functions. The reason is that they must deal with asynchronous events when users interact with a web page. Such callback functions became a pain for many developers, especially when building complex and rich apps with JavaScript for modern browsers. To overcome such complexity, ES6 introduced Promises, a modern and powerful abstraction for writing asynchronous code in a better and easily maintainable way. In this article, you’ll learn about what is Promise in Angular application and will come across the concept of JavaScript Promises introduced in ES6. What is Promise in JavaScript? A promise is a JavaScript or TypeScript object that may produce a value at some point in time. A promise may be in one of 4 possible states: fulfilled – The action relating to the promise succeeded rejected – The action relating to the promise failed just because an error occurs during promise implementation pending – It’s an initial state that hasn’t fulfilled or rejected yet settled – Has fulfilled or rejected Get Custom-Tailored Web App Development Solutions For Your Business Needs We strictly adhere to the standard software development lifecycle to provide the best possible IT solutions for your business success. Contact Us How To Create a Promise in JavaScript? Let’s highlight a simple example of creating a promise in plain JavaScript. Copy var promise = new Promise((resolve, reject) => { resolve("Promise Resolved"); }) promise.then((success) => { console.log(success); }) .catch(function(error) => { console.log(error); }); // Output: Promise Resolved The developers from the leading AngularJS development company implements Promises by calling the then() and catch() methods. then() method: It takes two callback functions as parameters and is invoked when a promise is either resolved or rejected. catch() method: It takes one callback function and is invoked when an error occurs. Now, let us understand the basic concept of “what is Promise in Angular?” Related Post: Angular Resolver What is Promise in Angular? When the AngularJS developers are dealing with asynchronous operations like an HTTP request, they are not sure of the exact time to get a response from the server. By default, Javascript is a programming language that is Synchronous; Blocking; and Single-threaded language. In simple words, we can say that the Javascript engine can process only one code at a time in a single thread. So, when a thread is blocked, we can’t execute other code that is also blocked, making JS slow and unable to perform multiple operations. On the other hand, the asynchronous operation is solely responsible for making code nonblocking. It means that it allows the developers to execute multiple codes at the same time. In the Angular framework, the developers can quickly achieve asynchronous by utilising the following method. The Callback function The Promise from Javascript can be used in Angular. Observable using Rxjs library in Angular: Library for reactive programming using Observables. You may also like to read: What is Angular? Moreover, while dealing with an asynchronous operation, the developers can quickly move the code to the following line by allowing UI remains responsive. The user continues working on the application while asynchronous operations like HTTP requests are processed in the background. Now the concept of Promise in Angular comes into the picture. The Promise in Javascript is nothing but a piece of task that is wrapped in asynchronous operation and notified whenever the asynchronous process is completed or failed at some point in the future. Two possible outcomes occur when the developer runs the Promise: The Promise is completed or failed. With the help of the async and await keyword with Promise, it becomes easy for the developers to deal with easy to read, write, and we can also use “try and catch” for error handling with (async & await). Planning To Develop a Robust Single-Page Application? Albiorix is a leading AngularJS Development Company having core expertise in designing and building feature-rich applications for all your business needs. Contact Us Angular Promise Example Its time to see how to use promises in Angular development First, we will create a simple Angular application using Angular CLI. ng new angular-promise-example –routing=false –style=css This command will create a new Angular application with no routing and CSS for stylesheet format. Next, we will set up HttpClient to send API requests to web servers to create or fetch data. Fetching data is a standard asynchronous operation as you always have to wait for an amount of time to receive the requested data. In Angular development, you can use HttpClient for fetching data. HttpClient uses RxJS Observables to handle asynchronous operations; let’s see how to use JavaScript/ES6 Promises instead. In the app/app.module.ts file of your project, add the following changes: Copy import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { FormsModule } from '@angular/forms'; import { HttpClientModule } from '@angular/common/http'; import { AppComponent } from './app.component'; import { HelloComponent } from './hello.component'; @NgModule({ imports: [ BrowserModule, FormsModule, HttpClientModule ], declarations: [ AppComponent, HelloComponent ], bootstrap: [ AppComponent ] }) export class AppModule { } Next, open the src/app/app.component.ts file and add the following code to send a HTTP GET request and process the response using a Promise in Angular. Copy import { Component } from "@angular/core"; import { HttpClient } from "@angular/common/http";@Component({ selector: "app-root", templateUrl: "./app.component.html", styleUrls: ["./app.component.css"] }) export class AppComponent { title = "Angular Application and Promises Example";API_KEY = "e40d07f00b094602953cc3bf8537477e"; constructor(private httpClient: HttpClient) {} ngOnInit() { console.log("Angular Promises"); this.fetchDataAsPromise() .then((data) => { console.log(JSON.stringify(data)); }) .catch((error) => { console.log("Promise rejected with " + JSON.stringify(error)); }); } fetchDataAsPromise() { return this.httpClient .get( `https://newsapi.org/v2/top-headlines?sources=techcrunch&apiKey=${this.API_KEY}` ) .toPromise(); } } We import HttpClient and inject it via the component constructor and use it to send the HTTP request. Next, we call the get() method to send the request and the toPromise() method to convert the returned RxJS Observable to a promise. Copy fetchDataAsPromise() { return this.httpClient .get( `https://newsapi.org/v2/top-headlines?sources=techcrunch&apiKey=${this.API_KEY}` ) .toPromise(); } In the ngOnInit() life-cycle method, we send the actual request by calling the then() method of the promise as follows: Copy this.fetchDataAsPromise() .then((data) => { console.log(JSON.stringify(data)); }) .catch((error) => { console.log("Promise rejected with " + JSON.stringify(error)); }); If the promise is resolved successfully we simply output the data in the console and in case of an error we display the error. Related Post: Angular Promise Vs Observable Conclusion So, I hope you got a clear vision on what is Promise in Angular development is. In addition, we came across the concept of JavaScript Promises introduced in ES6. We have seen the implementation of JavaScript promises that can be specifically included in the application. In addition, we came across the example of creating a promise in the Angular application. Still, if you have any query related to web application development, Angular is the best and leading option that help you build applications for all business verticals.