Nodejs walk dir example

walk-dir-filter.ts

import { readdir } from "node:fs/promises";
import { extname, resolve } from "node:path";

async function* walkDir(dir: string): AsyncGenerator<string> {
  const entries = await readdir(dir, { withFileTypes: true });
  for (const entry of entries) {
    const name = resolve(dir, entry.name);
    if (entry.isDirectory()) {
      yield* walkDir(name);
    } else if (filterFile(entry.name)) {
      yield name;
    }
  }
}

const filterFile = (file: string): boolean => {
  return [".css", ".js", ".html", ".xml", ".cjs", ".mjs", ".svg", ".txt"].some(
    (ext) => extname(file) == ext,
  );
};