How do I stop a touch event from falling on an overlay object in a web browser for a mobile device?
Pressing SetCore will add events to objects. If you touch inside core
, it will start the timer and show the time by touching coreText
. When you touch the black box coreObject
, the touch drops to core
.
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>TouchTest</title>
<style>
*, html, body{
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
</style>
<script>
var arrTimers = [];
function Timer(){
this.t;
this.count = 0;
this.start = function(){
console.log("starting");
this.count = 0;
this.t = setInterval(this.add.bind(this), 50);
}
this.add = function(){
this.count++;
console.log(this.count);
}
this.stop = function(){
console.log("stopping");
clearInterval(this.t);
}
}
function setCore(){
document.getElementById('coreText').innerHTML = "objects set";
document.getElementById('core').addEventListener('touchstart', function(ev) {
if(ev.target.id in arrTimers){
arrTimers[ev.target.id].stop();
}else{
arrTimers[ev.target.id] = new Timer();
}
arrTimers[ev.target.id].start();
document.getElementById('coreText').innerHTML = "touchstart";
console.log(arrTimers[ev.target.id]);
}, false);
document.getElementById('core').addEventListener('touchend', function(ev) {
var count;
if(ev.target.id in arrTimers){
arrTimers[ev.target.id].stop();
count = arrTimers[ev.target.id].count;
}
document.getElementById('coreText').innerHTML = count;
}, false);
document.getElementById('coreObject').addEventListener('touchstart', function(ev) {
document.getElementById('coreText').innerHTML = ev.target.id;
}, false);
}
</script>
</head>
<body>
<div onclick="setCore()">SetCore</div>
<div id="core" style="display:block; position:relative; top:50px; left:20px; width:200px; height:200px; border:1px solid #000000;">
<div id="coreObject" style="display:block; position:absolute; top:90px; left:80px; width:80px; height:30px; border:1px solid #000000; background-color:#000000;"></div>
<div id="coreText" style="display:block; position:absolute; top:30px; left:15px; width:110px; height:30px; border:1px solid #000000;"></div>
</div>
</body>
</html>
How can I stop the touch event <div id="coreObject">
from falling?
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Add preventDefault()
and install bubbles
in false
.
So:
document.getElementById('coreObject').addEventListener('touchstart', function(ev) {
document.getElementById('coreText').innerHTML = ev.target.id;
ev.preventDefault();
ev.bubbles = false;
}, false);
Then it document.getElementById('core').addEventListener('touchend'...
will never work.
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