What programming language is the best choice for Angular 2 development?

As someone who is new to Angular 2, I've discovered that developers have the option to use TypeScript, ES6, and ES5 for their development needs. I understand that TypeScript is considered the superset of ES6 and ES5.

Given the stark differences in syntax between TypeScript and ES6/ES5, which one should take precedence for development purposes? And what is the rationale behind this decision?

Thank you.

Answer №1

Due to the completely different syntax between TypeScript and ES6/ES5

Actually, TypeScript introduces additional syntax. Take a look at this image:

Which one is the better choice to use?

In this case, TypeScript is the preferred option.

What are the benefits?

Improved IDE Tooling and enhanced code documentation options.

For Further Information

To understand why TypeScript is recommended, visit: https://basarat.gitbooks.io/typescript/content/docs/why-typescript.html

This video showcases the differences in tooling between JavaScript and TypeScript: https://www.youtube.com/watch?v=gmKXXI_ck7w

Answer №2

Just like @basarat mentioned, TypeScript acts as a superset of ES6. This allows you the flexibility to utilize ES6 features if desired while working with TypeScript. Included in this compatibility are ES6 modules, class support, and the ability to use backticks directly in TypeScript.

From my perspective, three standout features of TypeScript include:

  • Type support and type checking. This standout feature ensures that you can catch any potential errors before running your application, providing a level of assurance that everything will work as intended.

    export class SomeClass {
      someProperty: string; // property of type string
      someProperty: SomeOtherClass; // property of type SomeOtherClass
    
      constructor(param:string) {
        this.someProperty = new SomeOtherClass();
        // SomeOtherClass must have a property named value of type
        // string. Otherwise, you will have some compilation errors.
        this.someProperty.value = param;
      }
    }
    
  • Comprehensive support of decorators. Unlike ES6, TypeScript allows for the use of decorators within constructor and method parameters. This is particularly useful in Angular2 for constructor-based dependency injection.

    // With ES6 only
    
    @Injectable()
    export class SomeClass {
      constructor(service) {
        this.service = service;
      }
    
      get parameters() {
        return [[SomeOtherClass]];
      }
    }
    
    // With TypeScript
    
    @Injectable()
    export class SomeClass {
      constructor(private service:SomeOtherClass) {
      }
    }
    
  • Support of interfaces. While interfaces are primarily for design time and not runtime, they serve as a way to define contracts for elements within your code.

    export interface SomeData {
      id:string;
      name:string;
    }
    
    @Injectable()
    export class SomeHttpService {
      constructor(private http:Http) {
      }
    
      executeHttpRequest():Observable<SomeData[]> {
        return this.http.get('http://...')
                   .map(res => <SomeData[]>res.json());
      }
    }
    

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