Javascript Class Inherit Static Members

Introduction

If a base class has static members, then those static members are available on the derived class. 

class Rectangle {/*w  w w.j  a v  a2s. c  om*/
    constructor(length, width) {
        this.length = length;
        this.width = width;
    }

    getArea() {
        return this.length * this.width;
    }

    static create(length, width) {
        return new Rectangle(length, width);
    }
}

class Square extends Rectangle {
    constructor(length) {

        // same as Rectangle.call(this, length, length)
        super(length, length);
    }
}

var rect = Square.create(3, 4);

console.log(rect instanceof Rectangle);     // true
console.log(rect.getArea());                // 12
console.log(rect instanceof Square);        // false



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