@abstract

Syntax

@abstract

Overview

@abstract marks a method as abstract. An abstract method defines a signature but provides no (or only placeholder) implementation. Subclasses that extend the class are required to override the method.

Example

class Shape {
  /**
   * Calculate the area of the shape.
   * @abstract
   * @returns {number}
   */
  area() {
    throw new Error('Subclasses must implement area().');
  }
}

class Circle extends Shape {
  /** @param {number} radius */
  constructor(radius) {
    super();
    this.radius = radius;
  }

  area() {
    return Math.PI * this.radius ** 2;
  }
}

See also

• @override
• @interface

Official reference: jsdoc.app/tags-abstract