Sanjeev K Sanjeev K - 3 months ago 86
CSS Question

scroll to next divs on mousewheel jQuery

Trying to create a parallax page and on each mousewheel, page would scroll to next

div
(block)

I tried with the following code but no luck, can anyone please suggest.

Here is the working JSFiddle demo, (I have added mousewheel plugin as well)



$(document).ready(function() {
$('section').css({
'height': (($(window).height())) + 'px'
});

// Now bind the event to the desired element
$('section').bind('mousewheel', function(e) {
if (e.wheelDelta / 120 > 0) {
$(this).text('scrolling up !');
} else {
$(this).text('scrolling down !');
}
});
});

$(window).resize(function() { // On resize
$('section').css({
'height': (($(window).height())) + 'px'
});

});

.container-fluid {
padding: 0;
}
section {
float: left;
width: 100%;
position: relative;
}
.screenOne {
background-color: rgba(0, 0, 0, 0.7);
}
.screenTwo {
background-color: rgba(0, 0, 0, 0.6);
}
.screenThree {
background-color: rgba(0, 0, 0, 0.4);
}
.screenFour {
background-color: rgba(0, 0, 0, 0.3);
}
.screenFive {
background-color: rgba(0, 0, 0, 0.2);
}
.screenSix {
background-color: rgba(0, 0, 0, 0.1);
}
h1 {
text-align: center;
color: #ff0000;
margin: 25% 0 0 0;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container-fluid">
<section class="screenOne">
<h1>One</h1>
</section>
<section class="screenTwo">
<h1>Two</h1>
</section>
<section class="screenThree">
<h1>Three</h1>
</section>
<section class="screenFour">
<h1>Four</h1>
</section>
<section class="screenFive">
<h1>Five</h1>
</section>
<section class="screenSix">
<h1>Six</h1>
</section>
</div>




Answer

This should work: https://jsfiddle.net/jtpbq9zf/

Refer to event.wheelDelta returns undefined for event.originalEvent.wheelDelta

$(function(){
  $('section').css({'height':(($(window).height()))+'px'});
  // Now bind the event to the desired element
  $('section').on('mousewheel', function(e){
    e.preventDefault();
    if(e.originalEvent.wheelDelta < 0) {
      if (!$(this).is(':last-child'))
        $('body').scrollTop($(this).next().offset().top);
    } else {
      if (!$(this).is(':first-child'))
        $('body').scrollTop($(this).prev().offset().top);
      }
  });
  $(window).resize(function(){ // On resize
      $('section').css({'height':(($(window).height()))+'px'});
  });
});

Smooth version

Just replace $('body').scrollTop($(this).next().offset().top);

with $('body').animate({scrollTop:$(this).next().offset().top}, '700');

..of course look at prev() and next() elements.

Comments