问题
I'm using the popular mousewheel plugin to to emulate the fullpage scroll like this website.
jQuery(function() {
var top = 0,
viewport = jQuery(window).height(),
step = jQuery(".home .l-section:first").outerHeight(),
body = jQuery.browser.webkit ? jQuery('body') : jQuery('html'),
wheel = false;
jQuery('body').mousewheel(function(event, delta) {
wheel = true;
if (delta < 0) {
top = (top + viewport) >= jQuery(document).height() ? top : top += step;
body.stop().animate({
scrollTop: top
}, 400, function() {
wheel = false;
});
} else {
top = top <= 0 ? 0 : top -= step;
body.stop().animate({
scrollTop: top
}, 400, function() {
wheel = false;
});
}
return false;
});
jQuery(window).on('resize', function(e) {
viewport = jQuery(window).height();
step = jQuery(".home .l-section:first").outerHeight();
});
jQuery(window).on('scroll', function(e) {
if (!wheel) top = jQuery(this).scrollTop();
});
});
It works great but NOT when using the trackpad. Using trackpad, it just scrolls to the bottom of the page no matter how slowly I try to scroll.
回答1:
Works well with my laptop's trackpad. However, this is known issue, did you try using debounce?
function mouseHandle(event) {
newDate = new Date();
var scrollAllowed = true;
if( wheel < 10 && (newDate.getTime()-oldDate.getTime()) < 100 ) {
scrollPos -= event.deltaY*(10-wheel);
wheel++;
}
else {
if( (newDate.getTime()-oldDate.getTime()) > 100 ) {
wheel = 0;
scrollPos -= event.deltaY*60;
}
else {
scrollAllowed = false;
}
}
oldDate = new Date();
if( scrollAllowed ) {
// do your stuff here
}
}
//Apply this effect with jQuery On event
$('body').on('mousewheel', function(event) { mouseHandle(event); });
This is already reported issue here : https://github.com/brandonaaron/jquery-mousewheel/issues/36
You will get multiple solutions there. Hope that helps. Help yourself :-)
Peace,
Rahul
回答2:
I solved my problem tracking with date(), so the user is not able to scroll any more if a certain time set by me, is not in the past.
Here is my snippet just using the 'wheel' function
var last_time = new Date();
$(window).bind('wheel', function(event) {
var now = new Date();
if((now - last_time) >= 1200)//Miliseconds
{
if (event.originalEvent.deltaY <= 0) {
//Go up
}
else {
//Go down
}
last_time = new Date();
}
});
回答3:
to anyone else who finds this, the "mousewheel" event has been deprecated. https://developer.mozilla.org/en-US/docs/Web/Events/wheel
instead, use the "wheel" event you can use the "originalEvent" property on the wheel event to get to the attributes you would be expecting. (deltaX, deltaY, etc...)
回答4:
I have used underscore's debounce function to overcome this issue. This is the code I have used.
$('...').mousewheel(_.debounce(function(event) {
event.preventDefault();
if(event.originalEvent.deltaY < 0){
/* do your stuff when scrolling up */
}else {
/* do your stuff when scrolling down */
}, 40,true));
来源:https://stackoverflow.com/questions/25333061/jquery-mousewheel-doesnt-support-trackpad