Hide the upper part of the navbar when scroll (smoothly!) - javascript

Hello I customized a Bootstrap navbar with 2 rows (the upper part is just logo and social links and the down part are navigation links). I am trying to hide the upper part when scrolling but I can't find a way to do it smoothly. I think the code below is the best solution I found, but for now the eventlistener on transitionend doesn't work and the class 'hidden' is never added.
var scrollpos = window.scrollY;
var header = document.getElementById("header-up-section");
function add_class_on_scroll() {
header.classList.add('visuallyhidden');
header.addEventListener('transitionend', function(e) {
header.classList.add('hidden');
}, {
capture: false,
once: true,
passive: false
});
}
function remove_class_on_scroll() {
header.classList.remove('hidden');
setTimeout(function () {
header.classList.remove('visuallyhidden');
}, 20);
}
window.addEventListener('scroll', function(){
scrollpos = window.scrollY;
if(scrollpos > 20){
add_class_on_scroll();
}
else {
remove_class_on_scroll();
}
console.log(scrollpos);
});
*/and CSS :
#header-up-section.visuallyhidden {
opacity: 0;
}
#header-up-section.hidden {
display: none !important;
}
The header-up-section turns invisible but the div is not hidden. Any idea to help?

Finally no need for JS to do this. Just need 2 bootstrap navbars and add to the second one (which is a pseudo 'down part' of a two rows navbar) the bootstrap class 'sticky-top'. It does the job perfectly ;)

Related

Add class onscroll combined with onepage-scroll.js plug-in

I'm currently using the onepage-scroll.js (https://github.com/peachananr/onepage-scroll) plug-in on my website to scroll through the homepage. When scrolling past the first "slide" I would also like to add a class (sticky) to my header to change some CSS. I've tried the code below, but I can't seem to get it working and I'm kinda in the dark here on how to make this solution work.
var header = $("header");
$("#sliders").scroll(function() {
var scroll = $('#sliders').scrollTop();
console.log(scroll);
if (scroll >= 50) {
header.addClass("sticky");
} else {
header.removeClass("sticky");
}
});
Try to make it on document ready.
Down only my example worked code on onepage-scroll.js
$(document).ready(function(){
$(".main").onepage_scroll({
sectionContainer: ".sectionscroll",
responsiveFallback: 600,
loop: true,
afterMove:function (index){
if ((index == 2)||(index == 3)){
$('#main').addClass('darktheme');
}else{
$('#main').removeClass('darktheme');
}
}
});
//$(".main").moveTo(2);
$(".btn-list-bottom").click(function(){$(".main").moveTo(4)});
});
All you section must have the same class.

On scroll, logo color changes, but scrolling back up it stays the same

Im creating a fixed header where on load, the logo is flat white. On scroll, it changes to the full color logo.
However, when scrolling back to the top, it stays the same colored logo instead of going back to white.
Here's the code (and a pen)
$(function() {
$(window).scroll(function() {
var navlogo = $('.nav-logo-before');
var scroll = $(window).scrollTop();
if (scroll >= 1) {
navlogo.removeClass('.nav-logo-before').addClass('nav-logo-after');
} else {
navlogo.removeClass('.nav-logo-after').addClass('nav-logo-before');
}
});
});
http://codepen.io/bradpaulp/pen/gmXOjG
There's a couple of things here:
1) You start with a .nav-logo-before class but when the logo becomes black you remove that class and then try to get the same element using a class selector that doesn't exist anymore
2) removeClass('.nav-logo-before') is different than removeClass('nev-logo-before), notice the "." in the first selector.
3) You get the element using the $('.selector')in every scroll event, this can be a performance issue, it's better to cache them on page load and then use the element stored in memory
4) It's not a good practice to listen to scroll events as this can be too performance demanding, it's usually better to use the requestAnimationFrame and then check if the scroll position has changed. Using the scroll event it could happen that you scroll up really fast and the scroll event doesn't happen at 0, so your logo won't change. With requestAnimationFrame this can't happen
$(function() {
var navlogo = $('.nav-logo');
var $window = $(window);
var oldScroll = 0;
function loop() {
var scroll = $window.scrollTop();
if (oldScroll != scroll) {
oldScroll = scroll;
if (scroll >= 1) {
navlogo.removeClass('nav-logo-before').addClass('nav-logo-after');
} else {
navlogo.removeClass('nav-logo-after').addClass('nav-logo-before');
}
}
requestAnimationFrame(loop);
}
requestAnimationFrame(loop);
});
body {
background-color: rgba(0,0,0,.2);
}
.space {
padding: 300px;
}
.nav-logo-before {
content: url(https://image.ibb.co/kYANyv/logo_test_before.png)
}
.nav-logo-after {
content: url(https://image.ibb.co/jYzFJv/logo_test_after.png)
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<img class="nav-logo nav-logo-before">
</div>
<div class="space">
</div>
Dont need to add the dot . in front of the class name in removeClass and addClass:
Use this:
navlogo.removeClass('nav-logo-before')
Secondly, you are removing the class that you are using to get the element in the first place.
I have an updated codepen, see if this suits your needs: http://codepen.io/anon/pen/ZeaYRO
You are removing the class nav-logo-before, so the second time the function runs, it can't find any element with nav-logo-before.
Just give a second class to your navlogo element and use that on line 3.
Like this:
var navlogo = $('.second-class');
working example:
http://codepen.io/anon/pen/ryYajx
You are getting the navlogo variable using
var navlogo = $('.nav-logo-before');
but then you change the class to be 'nav-logo-after', so next time the function gets called you won't be able to select the logo using jquery as it won't have the '.nav-logo-before'class anymore.
You could add an id to the logo and use that to select it, for example.
Apart from that, removeClass('.nav-logo-before') should be removeClass('nav-logo-before') without the dot before the class name.
The problem is that you removes nav-logo-before and then you want to select element with such class but it doesn't exist.
I've rafactored you code to avert it.
Another problem is that you uses dot in removeClass('.before') while it should be removeClass('before') - without dot
$(function() {
var navlogo = $('.nav-logo');
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= 1) {
navlogo.removeClass('before').addClass('after');
} else {
navlogo.removeClass('after').addClass('before');
}
});
});
body {
background-color: rgba(0,0,0,.2);
}
.space {
padding: 300px;
}
.before {
content: url(https://image.ibb.co/kYANyv/logo_test_before.png)
}
.after {
content: url(https://image.ibb.co/jYzFJv/logo_test_after.png)
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<img class="nav-logo before">
</div>
<div class="space">
</div>

Slide left and hide effect using jquery or CSS

I am working on a slide menu,
Please have a look at the demo site:
kotechweb.com/new_focus/
At left side there is a main menu , when toggle , the words right now is squeeze and hide, here is how I implement:
var is_closed = false;
$("#menu_btn").on("click", function () {
if (is_closed) {
$(".nav_bar ul").css("width", "75%");
} else {
$(".nav_bar ul").css("width", "0");
}
is_closed = !is_closed;
});
CSS:
transition: all 1s;
So the logic is using transition to implement the slide animation, however, this approach the text is squeeze when the width is smaller.
How to make the text slide left as well?
You can create a "mask" using
#menu_right{
overflow:hidden;
...
}
and move your menu in this way:
var is_closed = false;
$("#menu_btn").on("click", function () {
if (is_closed) {
$(".nav_bar ul").css("margin-left", "-100%");
} else {
$(".nav_bar ul").css("margin-left", "-0%");
}
is_closed = !is_closed;
});
I think this works like espected
First of all, instead of using CSS transitions use animate in JQuery as it allows for more functionality.
What I actually do for my slide menus is adding overflow-x: hidden to my body tag. I then position the menu outside of the page, so I give it the CSS value of right: 0 to position it just outside the left hand side of the page.
What this allows me to do is that when the user clicks the menu button you can animate the menu to slide out by simply changing the right value, so your final code would look something like this
$("#menu_btn").on("click", function () {
if (is_closed) {
$("#slideoutMenu").animate({right:"[insert width of nav menu]"}, 1000);
} else {
$("#slideoutMenu").animate({right:"0"}, 1000);
}
is_closed = !is_closed;
});
Use just jquery and jquery ui : Here
At the top reference the bellowed code.
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script src="http://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
And at script only add this :
$(".nav_bar ul").toggle( "slide");
Or also can use with customized time delay ms unit.
$( ".nav_bar ul" ).toggle( "slide",2000 );
Maybe you should .hide() the text when the sidebar collapses. Hope this helps.

Toggle class of sticky menu on scroll with overflow hidden on page

I want to add a class .custom-menu-bg to sticky menu .custom-menu on scroll, while having overflow: hidden on body. Here's my code :
<script type="text/javascript" src="css/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
var _rys = jQuery.noConflict();
_rys("document").ready(function() {
_rys(window).scroll(function() {
if (_rys(this).scrollTop() > 1) {
_rys('.custom-menu').addClass("custom-menu-bg");
} else {
_rys('.custom-menu').removeClass("custom-menu-bg");
}
});
});
</script>
But this code doesn't work with overflow: hidden on body tag
so I tried :
$('html').on('DOMMouseScroll', function(e) {
var delta = e.originalEvent.detail;
if (delta < 0) {
if ($('body').hasClass('section-element-1'))
$('.custom-menu').addClass("custom-menu-bg");
} else if (delta > 0) {
$('.custom-menu').removeClass("custom-menu-bg");
}
});
But this code only works for Mozilla and it's not a solution even, it's just a temp fix or work-around.
What I want is when I scroll down $('.custom-menu').addClass("custom-menu-bg"); i.e. custom-menu-bg class gets added to custom-menu.
And when I scroll up to the top $('.custom-menu').removeClass("custom-menu-bg"); i.e. custom-menu-bg class gets removed from custom-menu.
The top of body,document,window etcetera is always 0.
And top of my div with class custom-menu also has top: 0 always.
I'm looking for a permanent solution which works on all browsers.
I've reproduced the same effect you wanted HERE.
The only change that I've brought in comparison to your code is that I've made a makeshift body div and applied overflow: hidden on it.
Then, using jQuery, you'll be checking for the scroll event triggered by a wrapper inside the body div - which is in charge of holding the content) - and not by itself (or even document).
$('.wrapper').scroll(function () {
if ($(this).scrollTop() > 0) {
$('.custom-menu').addClass("custom-menu-bg");
} else {
$('.custom-menu').removeClass("custom-menu-bg");
}
});
This is because the makeshift body div has an overflow property set to hidden, and therefore won't generate that particular scroll event (maybe it would if you had the handler registered using browser-specific scroll events). Whereas the inner wrapper div will always have it's height property determined by it's content and is therefore scrollable.
NOTE: jQuery's scroll() is cross-browser, and hence a permanent solution.
You can bind on any id or on class also . its on you for now demo i
am using window .
This single event works for both if you have scroll or not. i.e overflow:hidden or overflow:scroll
$(window).bind('mousewheel DOMMouseScroll', function(event){
if (event.originalEvent.wheelDelta > 0 || event.originalEvent.detail < 0) {
// scroll up
$('.custom-menu').removeClass("custom-menu-bg");
}
else {
// scroll down
$('.custom-menu').addClass("custom-menu-bg");
}
});
.custom-menu {
background-color: black;
height: 100px;
width: 100%
}
.custom-menu-bg{
background-color: green;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="custom-menu">
</div>
Or you can also use this jQuery mousewheel plugin https://github.com/brandonaaron/jquery-mousewheel.
//toggled is class when mobile menu is opened
let moveScroll = '';
window.onscroll = function (e) {
const navBar = document.getElementById('id-of-your-navigation-bar');
if (moveScroll > 0 && navBar.classList.contains('toggled')) {
navBar.classList.remove('toggled');
moveScroll = 0;
} else if (navBar.classList.contains('toggled')) {
moveScroll = 1;
}
};

Div Transitions - IE vs. others

I have a JSFiddle that displays a series of boxes. If one of the boxes is clicked, it expands to cover the other boxes, then displays text. When the now expanded box is clicked, it retracts to its original width and height. This javascript works flawlessly in Firefox, Chrome, and Safari. However, in Internet Explorer (v10), the box expands but fails to retract. Any Insight on why this may be?
JSFiddle: http://jsfiddle.net/QBdDE/
Javascript:
$('div').on('click', function (e) {
if ($(this).hasClass('clicked')) {
setTimeout(function (div) {
return function () { div.css('z-index', '') ; } ;
} ($(this)), 1000) ;
$('.overlay-text').hide();
}
else {
$(this).css('z-index', 400) ;
setTimeout(function(){$('.overlay-text').show();},1000);
}
$(this).toggleClass('clicked') ;
});
What's Going On
Problem:
pointer-events support was added in IE11. IE10 is ignoring this, and because your overlay is on top, the mouse is interacting with it. We can get around this though!
Solution:
We need to remove dependency on that CSS rule. To do this, we need to do two things:
1.) We need to make the hover color stays applied even if the :hover effect isn't happening. We can add another selector to our CSS so that the .clicked class will cause the colors.
2.) We need to address what happens when .overlay_text is clicked, and use that to trigger the shrinking animation.
Code
1.) Hover Effect
We need to add in another select to every place :hover is used:
Old CSS:
.first_box:hover {
...background color rule ...
}
New CSS:
.first_box:hover, .first_box.clicked {
...background color rule ...
}
Duplicate the above for all 4 box rules.
2.) .overlay-text Trigger
We need to cause a click on .overlay-text to trigger the shrinking.
Old JS:
$('div').on('click', function (e) {
if ($(this).hasClass('clicked')) {
setTimeout(function (div) {
return function () { div.css('z-index', '') ; } ;
} ($(this)), 1000) ;
$('.overlay-text').hide();
}
else {
$(this).css('z-index', 400) ;
setTimeout(function(){$('.overlay-text').show();},1000);
}
$(this).toggleClass('clicked') ;
});
New JS:
We have to add a new selector to the .on() code, then we have to add .clicked to both the selected square, add the overlaying section. Finally we have to remove .clicked from both. We can't use .toggleClass() because we are adding to $(this) and removing from all divs.
$('div, .overlay-text').on('click', function (e) {
if ($(this).hasClass('clicked')) {
setTimeout(function (div) {
return function () { div.css('z-index', '') ; } ;
} ($(this)), 1000) ;
$('.overlay-text').hide();
$('div').removeClass('clicked');
$('.overlay-text').removeClass('clicked');
}
else {
$(this).css('z-index', 400) ;
setTimeout(function(){$('.overlay-text').show();},1000);
$(this).addClass('clicked');
$('.overlay-text').addClass('clicked');
}
});
Summary
I've tested in IE10 and it works.
Working Example:
Extra
If I may say, the CSS structure you are using could be improved and your animations will look a lot better. Chrome and IE both flicker during the animation of the two left blocks.
This is because their width AND position is being animated. If you position them from right:0, only their width will animate and it'll look a lot smoother.
I've created a Fiddle for you to address the above. I used absolute positioning. The CSS ends up being shorter, but mainly the animation doesn't flicker. Take a look:
Working Example:
Extra 2
As per comments from OP, we are going to prevent users from double clicking. Since all animations take 1 second, we will disable clicking from triggering anything for 1 second after each click.
It's actually pretty simple to do. In the Extra 1 above, we cleaned up the JS, and it became this:
$('div, .overlay-text').on('click', function (e) {
if ($(this).hasClass('clicked')) {
$('.overlay-text').hide();
$('div').removeClass('clicked');
$('.overlay-text').removeClass('clicked');
}
else {
setTimeout(function(){$('.overlay-text').show();},1000);
$(this).addClass('clicked');
$('.overlay-text').addClass('clicked');
}
});
We just need to add a global variable that starts true. When once the click happens, set it to false immediately, and after 1 second, set it to true. Then we just check to see if it's true, and don't do anything at all if it's false:
var notdouble = 1;
$('div, .overlay-text').on('click', function (e) {
if (notdouble) {
if ($(this).hasClass('clicked')) {
$('.overlay-text').hide();
$('div').removeClass('clicked');
$('.overlay-text').removeClass('clicked');
}
else {
setTimeout(function(){$('.overlay-text').show();},1000);
$(this).addClass('clicked');
$('.overlay-text').addClass('clicked');
}
notdouble=0;
setTimeout(function(){notdouble=1;},1000);
}
});
Working Example:
Note, this builds from the new structure in the Fiddle version 13, so it won't work exactly with the fixed version of the original structure. The concept can be adapted though.
Not working in IE 9 as the div click event never fires. I think it's covered by the section with class="overlay-text". But I've got a workaround by handling the click event of the section and triggering the div click event
$('section').on('click', function (e) {
$('.overlay-text').hide();
$( "div" ).addClass('clicked') ;
$( "div" ).trigger( "click" );
});

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