long-press.js

function long_press(el,nf,lf,sec){
  let longclick = false;
  let longtap = false;
  let touch = false;
  let timer;
  el.addEventListener('touchstart',()=>{
    touch = true;
    longtap = false;
    timer = setTimeout(() => {
      longtap = true;
      lf();
    }, sec);
  })
  el.addEventListener('touchend',()=>{
    if(!longtap){
      clearTimeout(timer);
      nf();
    }else{
      touch = false;
    }
  })
  
  el.addEventListener('mousedown',()=>{
    if(touch) return;
    longclick = false;
    timer = setTimeout(() => {
      longclick = true;
      lf();
    }, sec);
  })
  el.addEventListener('click',()=>{
    if(touch){
      touch = false;
      return;
    }
    if(!longclick){
      clearTimeout(timer);
      nf();
    }
  });
}