The Dimension class encapsulates the width and height of a component (in integer precision) in a single object.

dimension.class.ts

/**
 * The Dimension class encapsulates the width and height
 * of a component (in integer precision) in a single object.
 */
export class Dimension {
  /**
   * The width dimension; negative values can be used.
   * @default 0
   */
  protected width: number;
  /**
   * The height dimension; negative values can be used.
   * @default 0
   */
  protected height: number;

  public constructor();
  public constructor(dimension: Dimension);
  public constructor(dimension: [number, number]);
  public constructor(width: number, height: number);
  public constructor(width?: any, height?: any) {
    this.setSize(width, height);
  }

  /**
   * Returns the width of this Dimension
   *
   * @return {number}
   */
  public getWidth(): number {
    return this.width;
  }

  /**
   * Returns the height of this Dimension
   *
   * @return {number}
   */
  public getHeight(): number {
    return this.height;
  }

  /**
   * Sets the size of this Dimension object or (int, int) or [int, int] or (size Dimension) to the specified size
   *
   * @param {undefined | Dimension | [number, number] | number} size
   */
  public setSize(): void;
  public setSize(size: Dimension): void;
  public setSize(size: [number, number]): void;
  public setSize(width: number, height: number): void;
  public setSize(width?: any, height?: any): void {
    if (typeof width === 'undefined') {
      this.width = 0;
      this.height = 0;
    } else if (width && width instanceof Dimension) {
      this.width = width.getWidth();
      this.height = width.getHeight();
    } else if(Array.isArray(width)) {
      this.width = width[0];
      this.height = width[1];
    } else {
      this.width = width;
      this.height = height;
    }
  }
}