Implement setInterval method using setTimeout

set-interval.js

/*
Implement the setInterval function in such a way that calling SetInterval.prototype.start 
will start the function passed to it and run the function at intervals `interval` until 
the SetInterval.prototype.clear method is called.

For example:

const theIntervalRunner = SetInterval(()=> console.log("logging'), 1000)
theIntervalRunner.start()
setTimeout(() => theIntervalRunner.clear(), 5000)

will print 'logging' 5 times

function SetInterval(fn, interval) {
}

SetInterval.prototype.start = function () {
}

SetInterval.prototype.clear = function () {
}
*/

// Solution culled from https://michaelzheng.medium.com/implement-setinterval-with-settimeout-bfe1f467731f
// function _setInterval(fn, delay) {
//   // wrap the original function, recursively call the wrapper function with setTimeout
//   const wrapper = () => {
//     fn();
//     return setTimeout(wrapper, delay)
//   }
//   setTimeout(wrapper, delay);
// }
// _setInterval(console.log.bind(null, 'hello world'), 1000);

function SetInterval(fn, interval) {
  this.fn = fn;
  this.interval = interval;
  this.toContinue = true
}

SetInterval.prototype.start = function () {
  const wrapper = () => {
    if(this.toContinue){
      this.fn()
      // returning in case the id may be nedded. 
      // Not really necessary for this particular implementation
      return setTimeout(wrapper, this.interval);
    }
    return
  };
  wrapper()
}

SetInterval.prototype.clear = function () {
  this.toContinue = false
}

const theFn = new SetInterval(() => {console.log("logging")}, 1000)
theFn.start()

setTimeout(() => {
  theFn.clear()
}, 5000);