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I am trying to mimic the functionality of the following website: www.verbaasd.net. Each scrolling "session" will only trigger one action.
Each time a user scrolls down an action will happen depending on the status of variabel count. I only want this to happen ONCE per scroll. For example if a user has a Macbook with touchpad it will fire multiple times very vast. The count will go from 1 to 4 pretty much instantly. Is there a way to set a timeout or something so it stops for 0.5 sec when variabel count increases or decreases by 1?
Current code:
var count = 1;
$(window).on('mousewheel DOMMouseScroll', function(e) {
if (e.originalEvent.wheelDelta / 120 > 0) {
count -= 1;
} else {
count += 1;
}
if (count < 1) count = 1;
if (count > 4) count = 4;
switch (count) {
case 1:
// do something
break;
case 2:
// do something
break;
case 3:
// do something
break;
case 4:
// do something
break;
}
$(".cd-background-wrapper").attr("data-slide", count);
});
743
I recommend other way.
You should use 'preventDefault' and delay effect using setTimeout.
I wrote a simple prototype code below link. (only tested on Chrome and safari)
http://codepen.io/nigayo/pen/PNEvmY
[HTML]
<body>
<div id="wrap">
<section>section A</section>
<section>section B</section>
<section>section C</section>
<section>section D</section>
</div>
</body>
[CSS]
body {
overflow: hidden;
height: 100%;
}
#wrap {
position: relative;
width: 100%;
height: 100%;
top: 0;
}
section {
width: 100%;
height: 600px;
}
section:nth-child(1) {
background: red;
}
section:nth-child(2) {
background: blue;
}
section:nth-child(3) {
background: green;
}
section:nth-child(4) {
background: magenta;
}
[JavaScript]
(function() {
var currentPanel = 1;
var wrap = $('#wrap');
var panelsize = 600;
var step = 10;
var interval = 1000;
var direction = 1;
var bAnimation = false;
function animation() {
setTimeout(function() {
var currentTop = parseInt(wrap.css("top"));
if (direction < 0) {
if (currentTop <= minValue) {
setTimeout(function() {
bAnimation = false;
}, interval);
return;
}
} else {
if (currentTop >= minValue) {
setTimeout(function() {
bAnimation = false;
}, interval);
return;
}
}
wrap.css({
"top": currentTop - step
});
animation();
}, 16);
}
$(window).bind('mousewheel DOMMouseScroll', function(event) {
event.preventDefault();
if (bAnimation) return;
var currentTop = parseInt(wrap.css("top"));
if (event.originalEvent.wheelDelta < 0) {
//down scroll
minValue = currentTop - panelsize;
step = 10;
direction = -1;
} else {
//up scroll
minValue = currentTop + panelsize;
step = -10;
direction = 1;
}
console.log(minValue, bAnimation);
bAnimation = true;
animation();
});
})();
If you refer to my codes, you should use 'jquery animate function' or 'requestAnimationframe' for animation logic.
106
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