Which command is used to install the latest version of Angular CLI?
The following command is used to install the latest version of Angular CLI:
npm install -g @angular/cli@latest
Can we upgrade the older version of Angular that we have installed on our system to the Angular 8 version? If yes, then how?
Yes. If you want to upgrade your Angular CLI or any older version of Angular to Angular version 8, you can easily do it. Follow the steps given below:
- First, check the older version of Angular that you are using. Run the ng –version command on the Node.js command prompt.
- Now, you have to uninstall the older version of Angular by using the following command.
npm uninstall -g angular-cli // For Windows Open Powershell on Administrator Mode
sudo npm uninstall -g angular-cli // For Mac - Now, verify and clear the cache by using the following commands.
npm cache verify
npm cache clean - Now, install the latest Angular CLI (Angular 8) by using the following command.
npm install -g @angular/cli@latest - You can now verify that you are using the correct version by using the following command.
ng –version
Why is Angular so popular in Modern Application Development?
Nowadays, Angular is a very popular framework and platform which had made robust web applications development very easy. There are many reasons behind its popularity: it unites the declarative templates, dependency injection, the end to end tooling, and integrates the top perform to resolve developers’ development challenges. Angular 8 facilitates developers to develop applications that could be live on the web and mobile, respectively.
What is the usage of Angular 8 ngIf Directive?
The Angular 8 ngIf directive is a structural directive that is used to add or remove HTML elements according to the expression. The expression must return a Boolean value true or false. You can see the functioning of nglf directive clearly. If the expression is false, then the element is removed. Otherwise, the element is inserted. It is similar to the ng-if directive of AngularJS.
How Angular 8 has enhanced the performance over its previous versions?
Angular 8 consists of advanced level features such as differential loading, CLI workflow improvements, Dynamic imports for lazy routes, Ivy rendering engine, Bazel, etc. which ensure systematic workflow and performance improvements.
What is the use of reactive forms in Angular 8?
Reactive forms use a model-driven approach to handle form inputs where values constantly change over time. It uses an explicit and immutable approach to manage the state of a form at a specific time. Every time the changes occur to the form state, it returns a new state. The reactive forms are used mainly for the following features:
- Reactive forms are more robust than template-driven forms.
- Reactive forms are more scalable, reusable, and testable.
- Reactive forms are preferred to use when the forms are a key part of the application, or the application is already built using reactive patterns. In both cases, reactive forms are best to use.
What do you mean by typeofchecks in Angular 8?
In Angular 8, the typeofchecks is used to check the type of value assigned to the variable. It is used same we used in JavaScript. In Angular version 8, you can also check the value assigned to the object by using typeofchecks.
What are the most prominent features of Angular 8?
Angular 8 is a very popular Typescript development framework used to develop Web Applications. Following is the list of most prominent features of Angular 8 that makes this framework powerful.
Angular 8 support Cross-Platform Features
- The Angular 8 platform can be used to develop Progressive Web Apps. By using Angular 8, you can develop an extremely fast website that can provide app-like experiences with zero-step installation and high-quality performance.
- With Angular 8, you can create native mobile apps by using strategies like Ionic, Cordova, or NativeScript.
- With Angular 8, by using native OS APIs, the developers can create Desktop-Installed apps for Windows, Mac, and Linux.
Better Speed & Performance - Angular 8 supports code generation facility that covert the templates into highly optimized code for JavaScript virtual machines. That’s why Angular 8 is super fast.
- Angular 8 apps and websites are SEO friendly.
- Angular 8 uses a new Component Router to provide a code-splitting facility that makes apps load faster.
High Productivity
- Angular 8 provides easy and powerful template syntax to create UI views.
- It provides Angular CLI, which is a command-line tool. This tool is used to start building fast, add components and tests, and then instantly deploy it.
- Angular’s IDEs make development easy and help you to find errors instantly. You can also see the other feedback in editors and IDEs.
Provide Full Development Support - Angular 8 supports animation. The developers can create high-performance animations with intuitive API and a very little code of Angular.
- The angular framework helps to create accessible applications with ARIA-enabled mechanism and developer guides.
What is data binding in Angular 8?
Data Binding is one of the key concepts of Angular 8. It is the most eminent technique which is used to link your data to the view layer. It is used to make a communication between the DOM and the TypeScript code of your component. In simple words, you can say that data binding is a communication between the typescript code of your component and your template, which the user sees. It makes it easy to define interactive applications without worrying about pushing and pulling data.
There are two types of data binding i.e., one-way data binding, two-way data binding.
What do you mean by Ivy in Angular 8?
Ivy is the code name for next-generation compilation and Rendering pipeline or Rendering Engine. It was released in Angular 8 as Opt-in. At the release of Angular 9, Ivy was intended to be the by default rendering engine instead of the older compiler and runtime, known as View Engine.