wait until condition becomes truthy. Inspired by former works or wait-until libraries and tutorials.

wait-until-async.js

const waitUntil = async (asyncCondition, timeoutMs) => {
  const wait = ms => new Promise(resolve => setTimeout(resolve, ms));
  const intervalMs = 1000;
  const startTime = Date.now();

  const result = await asyncCondition();
  const endTime = Date.now();
  const timeSpentMs = endTime - startTime;

  console.log(`checking waitUntil condition, timeout in: ${timeoutMs}ms`);

  if (result) return result;
  if (timeoutMs - timeSpentMs - intervalMs < 0) return result;

  await wait(intervalMs);

  return await waitUntil(asyncCondition, timeoutMs - timeSpentMs - intervalMs);
};