没有插件,我们需要做的就是使用mousewheel事件捕获鼠标mousewheel - 在Firefox上我们使用DOMMouseScroll - 而且取决于事件的originalEvent.wheelDelta的值 - 再次在Firefox中它是originalEvent.detail ,感谢Firefox - 如果这样值为正,则用户向上滚动,如果为负,则方向为向下。
jQuery ( 1 ) :
//initialize
var winHeight = $(window).height(),
pages = $('.page'),
navLinks = $('#menu-nav a'),
currentPage = 0;
$('html, body').animate({ scrollTop: 0}, 0);
// listen to the mousewheel scroll
$(window).on('mousewheel DOMMouseScroll', function(e){
//by default set the direction to DOWN
var direction = 'down',
$th = $(this),
// depending on the currentPage value we determine the page offset
currentPageOffset = currentPage * winHeight;
// if the value of these properties of the even is positive then the direction is UP
if (e.originalEvent.wheelDelta > 0 || e.originalEvent.detail < 0) {
direction = 'up';
}
// if the direction is DOWN and the currentPage increasing won't exceed
// the number of PAGES divs, then we scroll downward and increase the value
// of currentPage for further calculations.
if(direction == 'down' && currentPage <= pages.length - 2){
$th.scrollTop(currentPageOffset + winHeight);
currentPage++;
} else if(direction == 'up' && currentPage >= 0) {
// else scroll up and decrease the value of currentPage IF the direction
// is UP and we're not on the very first slide
$th.scrollTop(currentPageOffset - winHeight);
currentPage--;
}
});
// as final step we need to update the value of currenPage upon the clicking of the
// navbar links to insure having correct value of currentPage
navLinks.each(function(index){
$(this).on('click', function(){
navLinks.parent().removeClass('current');
$(this).parent().addClass('current');
currentPage = index;
});
});
( 1 ) 更新
如果你不想使用jQuery,下面是与上面相同的纯 javascript代码,这在IE8及以下版本中不起作用:
纯Javascript:
//initialize
var winHeight = window.innerHeight,
pages = document.getElementsByClassName('page'),
navLinks = document.querySelectorAll('#menu-nav a'),
currentPage = 0;
window.addEventListener('mousewheel', function(e) {
scrollPages(e.wheelDelta);
});
window.addEventListener('DOMMouseScroll', function(e) {
scrollPages(-1 * e.detail);
});
function scrollPages(delta) {
var direction = (delta > 0) ? 'up' : 'down',
currentPageOffset = currentPage * winHeight;
if (direction == 'down' && currentPage <= pages.length - 2) {
window.scrollTo(0, currentPageOffset + winHeight);
currentPage++;
} else if (direction == 'up' && currentPage > 0) {
window.scrollTo(0, currentPageOffset - winHeight);
currentPage--;
}
}
for (var i = 0; i < navLinks.length; i++) {
navLinks[i].addEventListener('click', updateNav(i));
}
function updateNav(i) {
return function() {
for (var j = 0; j < navLinks.length; j++) {
navLinks[j].parentNode.classList.remove('current');
}
navLinks[i].parentNode.classList.add('current');
currentPage = i;
}
}
更多推荐
HTML如何让鼠标滑轮到下一页,html - 如何使用鼠标滚轮跳转到html中的下一个或上一个#部分 - 堆栈内存溢出...
发布评论