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

This better solution based on @Joshua, sometimes the code need to be called directly inside event (some web API require user acction to trigger something) for this case you can use this modification:

var longtouch;
var timer;
//length of time we want the user to touch before we do something
var touchduration = 500;

function touchstart() {
    longtouch = false;

    timer = setTimeout(function() {
       longtouch = true;
       timer = null
    }, touchduration);
}

function touchend() {
    if (timer) {
        clearTimeout(timer);
        timer = null;
    }
    if (longtouch) {
        // your long acction inside event
        longtouch = false;
    }
}

in setTimeout you set the flag to true and inside touchend, you check if it was set.