typescript.md

Set up

npm i -g typescript         // install typescript

Concepts

Basic

let name: string = 'John'
let names: string[] = ['John', 'Jack']

function getName(firstname: string, lastname: string): string {
    return firstname + ' ' + lastname
}

class Persion {
    public hobby: string
    static numOfPersons: number = 0
    
    constructor(private name: string, private age: number) {
        Person.numOfPersions++;
    }
    
    info() {
        console.log(this.name + ' ' + this.age)
    }
}

// generic function
const getType = function<T>(value: T): string {
    return typeof (T)
}

function driveVehicle<vehicle extends Vehicle>(v: Vehicle) {
    v.drive()
}
driveVehicle(car)
driveVehicle(bike)