await_and_change_interval.js

const interval = async (msFunc, callback, continueCond) => {
 const _interval = async () => {
   const sleepTime = msFunc();
   console.log("sleepTime: ", sleepTime);
   await new Promise(resolve => {
     setTimeout(resolve, sleepTime);
   });

   if (continueCond()) {
     callback();
     await _interval();
   }
 };
 await _interval();
}