Abstract-class-error NPM

AbstractConstructError

An error designed for being thrown when a class is instantiated, an object created, or a method is not overridden that, was intended to be abstract.

import AbstractConstructError from 'abstract-class-error';

class AbstractParent {
    constructor() {
        if (new.target === AbstractParent) {
            throw new AbstractConstructError('Cannot construct class AbstractParent instances directly');
        }

        if (this.abstractMethod === AbstractParent.prototype.abstractMethod) {
            throw new AbstractConstructError('Method "abstractMethod" must be overridden in class AbstractParent');
        }
    }

    abstractMethod() {}
}