You can use the super keyword to call the constructor of a parent class. Remember that super() must be called before using ‘this’ reference. Otherwise it will cause a reference error. Let’s the usage of it,
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | class Square extends Rectangle { constructor(length) { super(length, length); this.name = 'Square'; } get area() { return this.width * this.height; } set area(value) { this.area = value; } } |
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