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Tutorials > TypeScript > TypeScript Classes

TypeScript Classes

TypeScript allows to add type and access modifiers to the class properties and methods. There are three main access modifiers:

  • public - can be accessed from anywhere
  • private - can be accessed only from within the class
  • protected - can be accessed from within the class or from inherited classes
Below is a JavaScript class example:
class Person {
  personName;

  constructor(nm) {
    this.personName = nm;
  }
  getName() {
    return this.personName;
  }

  printName() {
    console.log(this.personName);
  }
}
let john = new Person("John Miller");
john.printName();
This class can be written in TypeScript as below specifying the types and access modifiers:

myFunction.ts
class Person {
  private personName: string;

  constructor(nm: string) {
    this.personName = nm;
  }
  
  public getName(): string {
    return this.personName;
  }

  public printName(): void {
    console.log(this.personName);
  }
}
let john = new Person("John Miller");
john.printName();
Output:
PS C:\Users\mail2\Downloads\demo> tsc myFunction.ts 
PS C:\Users\mail2\Downloads\demo> node myFunction.js
John Miller


Next: TypeScript Objects

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