How to call a function every hour?

Question

I am trying to update information from a weather service on my page. The info should be updated every hour on the hour. How exactly do I go about calling a function on the hour

Answer 1

// ... call your func now
let intervalId;
let timeoutId = setTimeout(() => {
  // ... call your func on end of current hour
  intervalId = setInterval(() => {
     // ... call your func on end of each next hours
  }, 3600000);
}, ((60 − moment().minutes()) × 60 × 1000) - (moment().second() * 1000));