Usage example of chokidar.

watch.js

import * as chokidar from "chokidar";

/**
 * Creates a watcher.
 *
 * @param {object} options
 * @param {string | readonly string[]} options.paths Paths or Glob patterns to watch.
 * @param {(path: string) => void} options.onChange
 * @param {() => void} [options.onExit]
 */
const watch = (options) => {
  const watcher = chokidar.watch(options.paths);
  const { onChange, onExit } = options;

  watcher.on("ready", () => {
    console.log("Start watching...");
    watcher.on("change", (path) => onChange(path));

    process.on("SIGINT", () => process.exit(0));
    process.on("exit", () => console.log("Stop watching."));
    if (onExit) process.on("exit", onExit);
  });

  return watcher;
};

export { watch };