seconds to ISO 8601

segToIso8601.js

let segToIso8601 = (duaration) => {

	let hours;
  	let minutes;
  	let seconds;
  	let result;
  
    if(duaration>3600){
      hours = Math.floor(duaration/3600)+"H";
      let min = Math.floor(duaration%3600);
      if(min>60){
        minutes = Math.floor(min/60)+"M";
        let seg = Math.floor(min%60);
        if(seg>0){
        	seconds = seg+"S";
        }
      }
      result = "PT" + hours + minutes + seconds;
    }else{
      if(duaration>60){
      	minutes = Math.floor(duaration/60)+"M";
      	let seg = Math.floor(duaration%60);
      	if(seg>0){
        	seconds = seg+"S";
        }
        result = "PT" + minutes + seconds;
      }else{
        if(duaration>0){
        	seconds = seg+"S";
        }
        result = "PT" + seconds;
      } 
   	}
   	return result
}


console.log(segToIso8601(935));