JavaScript waitFor Promise based utility function

waitFor.js

/**
 * Waits specific amount of time for a function to fulfill
 * @param {number} timeout
 * @param {function} check
 * @return {Promise<any>}
 */
waitFor: (timeout, check) => new Promise((resolve, reject) => {
  const timer = setInterval(() => {
    if (check()) {
      clearInterval(timer);
      resolve();
    }
  }, 100);
  setTimeout(() => {
    clearInterval(timer);
    reject();
  }, timeout);
}),

// Usage

let variable = false;
const check = () => variable;
setTimeout(() => {
	variable = true;
}, 3000);

waitFor(4000, check)
	.then(() => {
  	console.log('success');
  })
  .catch(() => {
  	console.log('failure');
  });