it isn't a duplicate as I've read the others question but everyone assume that the scroll is vertical, while i need this for horizontal scroll.
What i'm trying to do is to scroll a div, placed somewhere in a page, when it reach the center of the screen or it is almost visible, then when it end its scroll i need to continue the page scrolll.
Actually i have a "slider" like this: JSFIDDLE
Actually, I can get an advise when the element is visible on the page after scrolling, but I don't know how to disable vertical scroll, scroll my div, and then scroll page again. The important thing is that the div scroll how much i continue the scrolling (intended with mouse, keyboard and maybe touch, it will be awesome)
function testInView($el){
var wTop = $(window).scrollTop();
var wBot = wTop + $(window).height();
var eTop = $el.offset().top;
var eBot = eTop + $el.height()+50;
return ((eBot <= wBot) && (eTop >= wTop));
}
function setInView(){
$(".slider-wrapper").each(function(){
var $zis = $(this);
$zis.removeClass("inview");
if(testInView($zis)){
alert("eccolo");
}
});
}
$(document).scroll(function(){
setInView();
});
$(document).resize(function(){
setInView();
});
$(document).ready(function(){
setInView();
});
If you want to disable vertical scrolling then just set overflow-y: hidden on body element
body {
overflow-y: hidden;
}
Related
I created an additional menu bar (.secondnav) that I want to place right below the original header (#headAnnouncementWrapper) in a website. The problem is, when scrolling, the header's height changes when going from relative position to fixed at the top, and also when on mobile.
I've been trying with this:
var scrolled = 78;
var headHeight = $('#headerAnnouncementWrapper').height();
$(window).scroll(function() {
if ($(window).scrollTop() > scrolled) {
$('.secondnav').css('position', 'fixed');
$('.secondnav').css('top', headHeight);
} else {
$('.secondnav').css('position', 'relative'),
$('.secondnav').css('top', headHeight);
}
});
But I don't know how I should be calculating the headHeight variable so it changes when the height changes, and how to use that result as the top value for the .secondnav's css.
Check the height of the main header inside the scroll event. Each time the scroll event triggers, it will recheck the height. Then, the next line will adjust the top margin of the lower header to match the height of the upper header. Top-margin here replaces your position method.
var scrolled = 78;
$(window).scroll(function() {
var headHeight = $('#headerAnnouncementWrapper').height();
$('.secondnav').css('marginTop', headHeight);
if ($(window).scrollTop() > scrolled) {
$('.secondnav').css('position', 'fixed');
} else {
$('.secondnav').css('position', 'relative'),
}
});
This script makes it so when you scroll down in a browser the navigation bar disappears/hides behind the header. I was wondering if it was possible if instead it hid as soon as you scrolled down, hiding it after a user scrolls down a certain number of pixels (say 50px) to avoid touchy nav hiding on slightest scroll.
Thanks in advance for any direction.
// Nav scroll test
var prev = 0;
var $window = $(window);
var nav = $('#belowhead');
$window.on('scroll', function(){
var scrollTop = $window.scrollTop();
nav.toggleClass('hidden', scrollTop > prev);
prev = scrollTop;
});
You can put this inside your "window.on('scroll')" function:
if(scrollTop > 50) {
nav.addClass('hidden');
} else {
nav.removeClass('hidden');
}
2019 Update / Adjustment
The following could be useful for anyone else wishing to develop a header that disappears when you scroll down. I just finished making the following for a website I'm creating that required the top header to disappear when the user started scrolling, but then reappear when they start scrolling up; continuously applying this logic if you were to constantly keep scrolling up and down on the website.
For starters, a class is added to my header tag called nav-scrolled when the user scrolls past a certain point - 50px in this case. This new class can then be styled to change the background-color, add a box-shadow etc...
$(function() {
var header = $(".nav-container");
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= 50) {
header.addClass("nav-scrolled");
} else {
header.removeClass("nav-scrolled");
}
})
});
However, this only solved the problem of not being able to edit the headers styles if the user is scrolling from the top of the page - not anywhere on the site - the following fixes this.
var userScroll;
var scrollTop = 0;
var delta = 5;
var navHeight = $('header').outerHeight();
$(window).scroll(function(event){
userScroll = true;
});
setInterval(function() {
if (userScroll) {
hasScrolled();
userScroll = false;
}
}, 250);
The next step for me was to sequentially add and remove classes show-nav and hide-nav that had been styled to display and hide the navigation menu. The following checks whether the user has scrolled (up or down) to a value higher than my delta variable. If the user is beginning to scroll up on the website, the class show-nav is added and the header transitions in from the top of the page. If the user is scrolling down the page the class hide-nav is added, and the header is hidden.
function hasScrolled() {
var st = $(this).scrollTop();
// Ensures a higher scroll than $delta
if(Math.abs(scrollTop - st) <= delta)
return;
// If they scrolled down and are past the navbar, add class .nav-up.
// This is necessary so you never see what is "behind" the navbar.
if (st > scrollTop && st > navHeight){
// Scroll Down
$('header').removeClass('show-nav').addClass('hide-nav');
$('.nav-toggle').removeClass('open');
$('.menu-left').removeClass('collapse');
} else {
// Scroll Up
if(st + $(window).height() < $(document).height()) {
$('header').removeClass('hide-nav').addClass('show-nav');
}
}
scrollTop = st;
}
I'm building a one page site, and wanting to have multiple divs, that are approximatly 400px (but vary) on top of each other. Instead of a smooth scroll, I would like jump to the next div and have it centred on the screen, at the same time adjust the opacity of the content above and below to draw attention to the centre div.
I have tried playing with a few scrolling plugins but have not had anything do what I'm after, most of them are geared towards a full page div, not one only a 1/3 or so the height of the page.
Can someone point me towards something I can adapt to perform this.
Add an event listener to the document which looks for elements with the class .next
Get the distance from the top of the viewport to the top of the element in question
subtract half the value of the viewport height minus the height of the element.
If the element is bigger than the viewport, scoll to to top of the element
Or scroll the element into the middle.
Set the opacity of the unfocused elements.
(Demo)
(function(){
"use strict";
document.addEventListener('click', function(e) {
if(e.target.className.indexOf('next') >= 0) {
var current = e.target.parentElement
var next = current.nextElementSibling || false;
if(next) {
var nextNext = next.nextElementSibling;
var height = next.offsetHeight;
var top = next.offsetTop;
var viewHeight = window.innerHeight;
if(viewHeight - height > 0) {
var scrollTo = top - ((viewHeight - height) / 2);
} else {
var scrollTo = top;
}
window.scroll(0, scrollTo);
current.style.opacity = '0.5';
next.style.opacity = '1';
if(nextNext) nextNext.style.opacity = '0.5';
}
}
}, false);
})();
I'm trying to create a scroller which loads content when the user nears the bottom of an element however I'm struggling with calculating the current distance from the bottom of the element #grid when the user scrolls.
$(window).scroll(function (event) {
var scroll = $(window).scrollTop();
var div = $('#grid');
var bottom = ((div.offset().top + div.height()) - scroll);
$('.scroll').html(bottom);
});
The .scroll element displays the value although it doesn't seem to be giving correct numbers. Any ideas, I've come to a stand still. I seem to be getting the distance from the top of the window to the bottom of the container, not from the current scroll position?
Top of page
Scrolled down
You need to add the height of the window too.
$(window).scroll(function (event) {
var scrollBottom = $(window).scrollTop() + $(window).height();
var div = $('#grid');
var bottom = ((div.offset().top + div.height()) - scrollBottom);
$('.scroll').html(bottom);
});
If bottom is negative by less than the window height, then the bottom of the #grid div is visible on the screen.
Right now I have it that if a user scrolls past the bottom of the side bar, then the sidebar turns to fixed and stays on the users page while they read the rest of the main content.
But now my fixed div is falling out into the footer. So, how can I stop it from falling out of the parent div and into the footer?
Here's a fiddle of what's going on: http://jsfiddle.net/95W8w/
All the code is in jsFiddle, but since SO requires I put code here if I have a jsFiddle include.
JavaScript:
$(document).ready(function() {
// Cache selectors for faster performance.
var $window = $(window),
$sidebar = $('#anchor'),
$sidebarAnchor = $('#right');
// Run this on scroll events.
$window.scroll(function() {
var window_top = $window.scrollTop();
var div_top = $sidebarAnchor.offset().top;
if (window_top > div_top) {
// Make the div sticky.
$sidebar.addClass('stick');
$sidebarAnchor.height($sidebar.height());
}
else {
// Unstick the div.
$sidebar.removeClass('stick');
$sidebarAnchor.height(0);
}
});
});
Change bottom to top in your .stick class definition to make the sidebar stick to the top instead of bottom.
.stick {position: fixed; top:0px;}