JS overview

index.js

const add = (a,b) => a + b

const result = add(2, 2)

console.log(add(2, 2))
console.log(result)



// Number
// // BigInt
// String
// Boolean
// null
// undefined
// //Symbol


// Object

// const foo = 4.5
// const baa = 'Hello'
// const fff = function(){}

// const fooViaConst = Number(4.5)
// const baaViaConst = String('some string')

// es2015
// var 
// let, const



class Shape {
    #privateX

    constructor (id, x, y) {
        this.id = id
        this.#move(x, y)
        this.#privateX = 42
    }
    #move (x, y) {
        this.x = x
        this.y = y
    }
    revealPrivateX(){
        return this.#privateX
    }

    static someMethod(){
        return 42
    }
    set x(value) {
        this._x = value
    }
    get x() {
        return this._x
    }
}

class Rectangle extends Shape {
    #privateX
    constructor (id, x, y, width, length) {
        super(id, x, y)
        this.id = id
        this.#move(x, y)
        this.#privateX = 42
    }
    #move (x, y) {
        this.x = x
        this.y = y
    }
}

const sh = new Shape(1,2,3)
console.log(sh)
console.log(sh.x)
console.log(sh.revealPrivateX())
console.log(Shape.someMethod())

const rect = new Rectangle(1,2,3,4,5)