ujs/src/pointer.js

export class Pointer {
  static #x;
  static #y;

  static init() {
    this.#x = 0;
    this.#y = 0;

    window.addEventListener('mousemove', this.mouseMove);
    window.addEventListener('mousedown', this.mouseDown);
    window.addEventListener('mouseup', this.mouseUp);
  }

  static set pos({ x, y }) {
    this.#x = x;
    this.#y = y;
  }
  static get pos() {
    return { x: this.#x, y: this.#y };
  }

  static mouseMove = (e) => {
    this.pos = { x: e.pageX, y: e.pageY };
  };

  static mouseDown = (e) => {
    this.pos = { x: e.pageX, y: e.pageY };
  };

  static mouseUp = (e) => {
    this.pos = { x: e.pageX, y: e.pageY };
  };
}