How to detect a long touch pressure with javascript for android and iphone?

Question

How to detect a long touch pressure with javascript for android and iphone? native javascript or jquery...

I want something that sound like :

Answer 1

We can calculate the time difference when the touch started and when the touch end. If the calculated time difference exceed the touch duration then we use a function name taphold.

var touchduration = 300; 
var timerInterval;

function timer(interval) {

    interval--;

    if (interval >= 0) {
        timerInterval = setTimeout(function() {
                            timer(interval);
                        });
    } else {
        taphold();
    }

}

function touchstart() {
    timer(touchduration);
}

function touchend() {
    clearTimeout(timerInterval);
}

function taphold(){
    alert("taphold");
}


document.getElementById("xyz").addEventListener('touchstart',touchstart);
document.getElementById("xyz").addEventListener('touchend',touchend);