Javascript: Implementing setInterval using SetTimeout

In JavaScript timing events come in two flavors:

setTimeout(function, milliseconds)
Executes a function, after waiting a specified number of milliseconds.
setInterval(function, milliseconds)
Same as setTimeout(), but repeats the execution of the function continuously.

Here is a code to implement setInterval code using setTimeout, also we have a method to clear the interval.

function cstmSetInterval(fn,ms){
  var id = setTimeout(function(){
       if(typeof fn === 'function'){
         fn();
       }else{
         throw new Error("Expecting a function as input parameter");
       }
       cstmSetInterval(fn,ms);   
  },ms);
  //consoling out the setTimeout ID
  console.log(id);
}
 
function clearCstmInterval(id){
  //clearTimeout takes the id of setTimeout and clears the time event
  clearTimeout(id);
}

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-Rushi

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Javascript: Implementing setInterval using SetTimeout

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