21 Tips To Make Learning Angular 2 Easier

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Angular 2 is a component-based web development framework. An application in Angular is a tree of loosely-connected components. This article provides readers with 21 tips to help them understand this wide and complex framework whose learning curve is continuous.

1. Utilize grok typings and TypeScript

Logic dictates that Angular applications can get written without TypeScript. The reality is that avoiding TypeScript is not a wise thing to do. TypeScript is the dominant mainstream of Angular 2; make sure you incorporate TypeScript when using Angular 2 to ensure a smooth flow. Understanding tslint.json, tsconfid.json, and typings.json is crucial for this process.

2. Get to understand Git

Users should strive to understand the operations of Git, a version control system that helps track alterations in computer files. Git also regulates work on the files among numerous people. People do not have to be very conversant with Git, but basic knowledge is paramount.

3. Avoid Transpiling in the Browser and UMD modules

Users can run an Angular 2 code through the use of UMD modules from a CDN assembled on a browser at runtime. While this is a good way of sharing small Angular 2 code pieces, it should only get used for code sharing and teaching. Target ES6 and ES6 modules through TypeScript loaded with a current-day JS loader.

4. Learn npm and Node

According to the Angular 2 project, Node.js and npm are essential to Angular 2 development. One cannot function without the other, so it is important to learn and understand them to comprehend Angular 2.

5. Understand that Angular 2 is not one script include like Angular 1.

Today, Angular development does not require the inclusion of a JavaScript file. Angular 2 comes with a collection of npm packages. Carrying out simple Angular 2 development procedures requires various npm packages. It is important to note that Angular 2 is composed of numerous Node and npm components.

6. Use a friendly TypeScript code editor

Choose a code editor that comprehends TypeScript either through a plug in or by default. It should also incorporate an updated JavaScript (Node/npm) development. WebStorm, Visual Studio Code, and Atom are currently the best choices. Many people may prefer using other editors, but first time Angular 2 users are likely to find these editors quite simple.

7. Angular 2 best operates on Updated JavaScript. Polyfilling at runtime is, therefore, required

An Angular 2 application rarely succeeds in an environment that runs on ES*, ES6, and ES5 codes. This is because without a polyfill, the Angular 2 project is likely to develop problems. Angular 2 projects are highly dependent on core-js to enable the Angular 2 codes to efficiently run in an environment that does not back ES6, ES*, and ES5 appropriately.  Carrying out an Angular 2 development is not necessary, but it is important to understand the role of core-js during runtime. Remember, Angular 2 applications do not run on anything less than IE9. Additionally, IE9 backing for ES6, ES5, AND ES* is not ideal. IE10 or IE11 backing is probably the best option.

8. Angular 2 comes with various, third-party, and hard dependencies one needs to grok

After comprehending npm, Node, a new code editor, and TypeScript, individuals should seek to understand the Angular 2 hard dependencies on reflect-metadata, zones.js, and RxJS. zones.js and reflect-metadata are interesting Angular 2 polyfills. The more one uses Angular 2, the more they understand polyfilling and its implications. RxJs has been endorsed by the Angular 2 project and plays a crucial role in the development of applications, especially when using HTTP responses on clients.

9. Angular 2 development needs a JS loader

Angular 2 developments mostly require the use of an updated JS loader, though Webpack works well, too. Whichever you choose, you must ensure you understand its operations well. Easy comprehension and use of Angular 2 is highly dependent on how well one understands the JS loader. Remember, Webpack and SystemJS aid in bundling as well as loading modules.

10. A modular CSS is required

Though the Quickstart code dispels the importance of modular CSS, it is crucial as incorporating CSS files in index.html may not hold much importance. Utilize the plugins provided by SystemJS or Webpack in loading CSS in a modular way, by use of an updated ES6 module syntax.

11. Developing Angular 2 code involves observing, assembling, and serving processes

Developing an Angular 2 code involves running numerous procedures that observe files, assembles them after alterations, and serves them to a browser through a local Node server. Many JavaScript developers are used to these procedures. However, for people who are in the process of learning Angular 2 together with tools that enhance development, numerous Node procedures may be surprising. Note that the terminal shall be running various procedures that enhance Angular 2 development. Remember that all TypeScript codes should be compiled to run in a browser.

12. No more MV*

Angular 2 applications have a starting root component that contains all other components. The components determine how applications get organized merging styles, views, controller logic, and state. Angular 2 development involves being able to understand interfacing and encapsulating of components with child and parent components.

13. Angular 2 is not the preserve of web browsers

Angular 2 focuses on application writing methods. Learning Angular 2 begins with writing a code that will run in a web browser. However, this is not a requirement. Angular 2 code is a tool that writes applications which have the potential to run on the mobile web, the web, native desktop, or native mobile device applications.

14. Functional programming depends on Angular 2 OOP

People who develop in OOP terms should not have a problem developing on Angular 2. However, Angular 2 uses ngrx/store and RxJS. One should understand that functional programming ideas are trespassing on OOP developer's mindset.

15. Testing is opinionated and assumed

Angular 2 development makes assumptions that individuals will write tests and use Karma, Jasmine, and protractor. These testing tools have penetrated the 'getting started' code and documentation. Even though individuals can use other tools, these are the recommended tools for testing an Angular 2 app.

16. Angular 2 is not yet RTM

Currently, Angular 2 is at release candidate 5. Release candidate 6 is expected to be a masterpiece. This means that general availability, release to manufacturing, and product release are yet to happen. Though this is the ideal time to begin learning it, it may not yet be time to use it for production purposes.

17. Angular 2 code can only get derived from npm

An Angular 2 code can only be found from npm and not in any other repository.

18. Begin learning Angular 2 configuration files

Make use of configuration files. Make sure to comprehend the pre-configurations available in these files:

·         systemjs.config.js or webpack.config.js

·         tsconfig.json

·         package.json

·         typings.json

·         protractor.config.js

·         tslint.json

·         karma.conf.js

19. Changing from Angular 1 to Angular 2 will not be easy

Moving from Angular 1 to Angular 2 will be difficult. Individuals will be required to learn new things which perhaps will not be compatible with the old ones. However, these changes will come with lots of supporting materials.

20. Advanced documentation

This is a collection of 15 tutorials which provides an overview to help individuals understand Angular 2. There is a lot to learn from component lifecycle, Angular animations, the navigation router, and various core features.

21. Angular 2 from scratch

This is a course that lasts one hour and focuses on Angular 2 basics. It is beginner-based, but everybody can learn from the video, especially on workflow and project management.

Mastering and practicing these comprehensive tips will enable everybody to master Angular 2 development procedures.

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Publié 1 août, 2017

Ruchi Bhargava

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