watch_vim_write_with_fs_watch.js

const fs = require('fs');
const process = require('process');
const child_process = require('child_process');

const sleep = async ms => new Promise(resolve => setTimeout(resolve, ms));

const file = 'vim.js';

let x = fs.watch(file, (async function fn (t, f) {
  console.log(`eventType: ${t}, file: ${f}`)

  if ('change' === t)
    return;

  x.close();
  x = null;

  for (let i = 0; i < 1000 || x; i++) {
    try {
      x = fs.watch(file, fn);
      x.addListener('close', () => console.log('closed'));
      console.log('ok: ' + i);
      break;
    } catch (e) {
      await sleep(50);
    }
  }
}));

console.log('start watching');