hide scrolling div content under transparent header - javascript solution needed - javascript

This has been asked several times before and the answer that matches my situation best is this one
Hide content underneath a transparent div while scrolling
basically, the content div is being moved through javascript.
However, I have a fixed header that will always be 155px. The header is transparent, and the text of content div should disappear when it reaches the header. I can not for various reasons use a masking solution, there are several layers of transparency and overlaying complicated backgrounds going on in the header. The content text should truly disappear once reached the header and not go "underneath".
Scroll to see what's going on. Currently on scroll the text covers the header unless the scrollbar passes the header.
JS Fiddle - https://jsfiddle.net/b5nyohr5/5/
$(window).load(function(){
var $window = $(window);
var $body = $('body');
var $contentWrapper = $('#content_wrapper');
var $content = $('#content');
var minHeaderHeight =160; // the height of the header plus margin
var lastWindowHeight = $window.height(); // save window height to calculate difference in height on resize
checkScroll(); // make sure scroll and all heights are correct on first load
stickyTop(); // make sure sticky top is used if needed on first load
$window.resize(function() {
checkScroll();
stickyTop();
});
$window.scroll(function() {
stickyTop();
});
function checkScroll() {
var newWindowHeight = $window.height();
var windowHeightDif = newWindowHeight - lastWindowHeight;
lastWindowHeight = newWindowHeight; // save current height for next call
var contentHeight = $content.height();
$contentWrapper.height(contentHeight); // make sure wrapper will show entire content
$body.height(newWindowHeight + contentHeight); // allow content to be scrolled off the screen by
// pushing content down by the amount of window height
var windowScrollTop = $window.scrollTop();
if (windowScrollTop > 0) { // don't scroll if at top to avoid video getting covered
$window.scrollTop(windowScrollTop + windowHeightDif); // scroll by window height difference to keep content
// in the same position on window resize
}
}
function stickyTop() {
var windowScrollTop = $window.scrollTop();
var maxScroll = ($window.height() - minHeaderHeight);
if (windowScrollTop >= maxScroll) {
$contentWrapper.css('position', 'fixed').css('top', minHeaderHeight); // stop wrapper top at bottom of header
} else {
$contentWrapper.css('position', 'absolute').css('top', ''); // allow regular scrolling
}
if ($contentWrapper.css('position') === 'fixed') { // if wrapper is fixed,
$content.css('top', -(windowScrollTop - maxScroll)); // continue scrolling by shifting content up
} else {
$content.css('top', 0); // make sure content is lined up with wrapper
}
}
});//]]>
html, body {
position: relative;
width:100%;
height:100%;
}
#header {
position: fixed;
top: 0;
left: 0;
z-index: -1000;
width:100%;
height: 155px;
background-color:rgba(0, 0, 0, 0.5)
}
#content_wrapper {
position: absolute;
left: 0px;
top:155px;
width: 100%;
z-index: -10;
overflow:hidden;
}
#content {
position: absolute;
left: 0px;
top: 0px;
font-size:36px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div id="container">
<div id="header">
<h1>This header is semi-transparent . All kind of overlaying opacity will go here. </h1>
</div>
<div id="content_wrapper">
<div id="content">
<p>The scrolling text needs to stop showing once it reaches the transparent header.
<p>Morbi facilisis neque a eros dictum, ut facilisis dolor pretium. Nulla sagittis vel ante sed ornare. Aenean in magna volutpat, consequat elit vitae, convallis purus. Mauris et orci lacinia, vestibulum odio non, bibendum tellus. Donec mollis, justo quis fermentum ultricies, lacus velit luctus odio, quis finibus mauris dolor vitae nulla. Morbi ac sagittis ante, consectetur pretium tellus. Aliquam erat volutpat. Donec facilisis gravida mauris quis ultricies. Duis et suscipit lorem. Pellentesque nec imperdiet nibh. Nullam pretium, nunc nec ultricies cursus, libero dui venenatis purus, a feugiat eros mauris vel libero. Quisque id risus maximus, dignissim sem id, tempus odio. Donec faucibus blandit mauris ac laoreet. Praesent scelerisque lobortis libero eget suscipit. Sed egestas diam hendrerit, fermentum felis in, eleifend lorem.</p>
<p>Donec tempus fringilla ipsum, aliquet suscipit diam ornare venenatis. Vestibulum scelerisque posuere nibh tristique aliquam. Proin ullamcorper ipsum non interdum semper. Vivamus id felis egestas nulla imperdiet convallis in vel dui. Sed vitae turpis non lorem blandit placerat. Curabitur posuere nisl ac felis consectetur, ut ultricies diam faucibus. Nunc laoreet malesuada tellus. Suspendisse efficitur accumsan lacus, ut pretium diam euismod vitae. Vestibulum tincidunt fringilla ligula a interdum.</p>
<p>Quisque luctus purus nec varius finibus. Sed ut lorem scelerisque velit pretium elementum. Maecenas sit amet maximus risus, pretium molestie arcu. Mauris vitae vestibulum lacus. Mauris porttitor aliquet turpis, vel aliquet nisl rutrum quis. Curabitur risus massa, placerat vitae sapien non, egestas efficitur elit. Etiam ut odio non nisl vestibulum venenatis quis ac erat. Curabitur id sem vel eros tristique dignissim ac id neque. Duis elementum, mi ut fringilla pellentesque, ante neque venenatis leo, a pretium nisi massa nec urna. Mauris quam mi, commodo maximus elementum eget, maximus a sapien. Pellentesque nec leo risus.</p>
<p>Etiam non luctus lacus. Aliquam velit nibh, ultrices vitae rhoncus eget, gravida non libero. Aenean lectus purus, ultrices id tincidunt sit amet, feugiat sed turpis. Nam ut turpis cursus ante placerat ultricies. In vitae mauris facilisis lorem maximus accumsan. Curabitur turpis odio, consequat at ante non, mollis porttitor felis. Pellentesque ultricies lacus dapibus diam laoreet venenatis. Phasellus faucibus sollicitudin mi, tempus elementum dui venenatis vitae. In lacinia dui leo, et laoreet eros vehicula nec. Nullam scelerisque ligula non ante luctus porttitor. Donec sed tortor ut felis imperdiet congue eget sit amet dui.</p>
<p>Nullam luctus condimentum augue pharetra facilisis. Mauris laoreet ut odio nec posuere. Maecenas accumsan luctus augue, vitae mollis risus dignissim non. Vivamus nec felis sed sapien porta venenatis. Proin a placerat lacus. Donec ut turpis sed massa mollis aliquet. Vivamus sit amet quam nec urna viverra facilisis. Suspendisse vel erat tellus. In pulvinar justo et quam accumsan tincidunt. Fusce purus est, luctus cursus justo ut, auctor sollicitudin nisl. Integer semper bibendum lorem. Fusce volutpat condimentum lorem vitae vestibulum. Pellentesque eleifend lacus eget sodales egestas. Ut purus urna, maximus quis felis nec, luctus gravida nibh.</p>
<p>Maecenas in lacinia nibh. Morbi non nibh a lorem egestas commodo. Vivamus arcu libero, congue sit amet velit ut, faucibus commodo sem. Mauris at tellus nec est molestie consectetur cursus quis nisi. Etiam vel consequat felis. Curabitur sed dui ac dolor sollicitudin laoreet non nec nunc. Sed bibendum eu est vel posuere. Fusce varius volutpat leo at porta. Curabitur maximus nunc ipsum. Aenean placerat dolor in enim feugiat volutpat. Ut pharetra nulla at lorem rutrum posuere. Integer eu justo nec quam vestibulum aliquet. Praesent aliquam fermentum est vel varius.</p>
<p>Pellentesque imperdiet pharetra molestie. Sed velit tortor, tincidunt et lacus quis, facilisis dapibus ex. Cras et rutrum leo, et sodales augue. In hac habitasse platea dictumst. Nunc acc</p>
</div>
</div>
</div>

Is there any reason your fixed header needs to be in the same container as the rest of the content?
<div class="fixedHeader" style="position: fixed; display: block; width: 100%;">
</div>
<div class="contentContainer" style="position: relative; display: block;">
</div>
I think this will have the same "scrolling under the header" effect?

I have found a solution by modifying Trevin Avery code slightly - removing variable maxScroll from Javascript code completely, as I don't need to push the scrollable content all the way out of the visible window, like his script does.
See demo - resize the browser window to see why transparency was needed.
$(window).load(function(){
var $window = $(window);
var $body = $('body');
var $contentWrapper = $('#content_wrapper');
var $content = $('#content');
var minHeaderHeight =160; // the height of the header plus margin
var lastWindowHeight = $window.height(); // save window height to calculate difference in height on resize
checkScroll(); // make sure scroll and all heights are correct on first load
stickyTop(); // make sure sticky top is used if needed on first load
$window.resize(function() {
checkScroll();
stickyTop();
});
$window.scroll(function() {
stickyTop();
});
function checkScroll() {
var newWindowHeight = $window.height();
var windowHeightDif = newWindowHeight - lastWindowHeight;
lastWindowHeight = newWindowHeight; // save current height for next call
var contentHeight = $content.height();
$contentWrapper.height(contentHeight); // make sure wrapper will show entire content
$body.height(newWindowHeight + contentHeight); // allow content to be scrolled off the screen by
// pushing content down by the amount of window height
var windowScrollTop = $window.scrollTop();
if (windowScrollTop > 0) { // don't scroll if at top to avoid video getting covered
$window.scrollTop(windowScrollTop + windowHeightDif ); // scroll by window height difference to keep content
// in the same position on window resize
}
}
function stickyTop() {
var windowScrollTop = $window.scrollTop();
// check where the scrollbar is
if (windowScrollTop >= 0) {
// stop wrapper top at bottom of header
$contentWrapper.css('position', 'fixed').css('top', minHeaderHeight);
} else {
// allow regular scrolling
$contentWrapper.css('position', 'absolute').css('top', '');
}
if ($contentWrapper.css('position') === 'fixed') { // if wrapper is fixed,
$content.css('top', - windowScrollTop); // continue scrolling by shifting content up
} else {
$content.css('top', 0); // make sure content is lined up with wrapper
}
}
});//]]>
html, body {
position: relative;
width:100%;
height:100%;
}
body {
background:url(http://www.idea-bureau.com/images/background.png);
background-repeat: no-repeat;
background-position:center, center;
background-attachment: fixed;
}
#header {
position: fixed;
top: 0;
left: 0;
z-index: -1000;
width:100%;
height: 155px;
background-color:rgba(0, 0, 0, 0.5);
}
#content_wrapper {
position: absolute;
left: 0px;
top:155px;
width: 100%;
z-index: -10;
overflow:hidden;
}
#content {
position: absolute;
left: 0px;
top: 0px;
font-size:25px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div id="container">
<div id="header">
<h1>This header is semi-transparent . All kind of overlaying opacity will go here. </h1>
</div>
<div id="content_wrapper">
<div id="content">
<p>The scrolling text needs to stop showing once it reaches the transparent header.
<p>Morbi facilisis neque a eros dictum, ut facilisis dolor pretium. Nulla sagittis vel ante sed ornare. Aenean in magna volutpat, consequat elit vitae, convallis purus. Mauris et orci lacinia, vestibulum odio non, bibendum tellus. Donec mollis, justo quis fermentum ultricies, lacus velit luctus odio, quis finibus mauris dolor vitae nulla. Morbi ac sagittis ante, consectetur pretium tellus. Aliquam erat volutpat. Donec facilisis gravida mauris quis ultricies. Duis et suscipit lorem. Pellentesque nec imperdiet nibh. Nullam pretium, nunc nec ultricies cursus, libero dui venenatis purus, a feugiat eros mauris vel libero. Quisque id risus maximus, dignissim sem id, tempus odio. Donec faucibus blandit mauris ac laoreet. Praesent scelerisque lobortis libero eget suscipit. Sed egestas diam hendrerit, fermentum felis in, eleifend lorem.</p>
<p>Donec tempus fringilla ipsum, aliquet suscipit diam ornare venenatis. Vestibulum scelerisque posuere nibh tristique aliquam. Proin ullamcorper ipsum non interdum semper. Vivamus id felis egestas nulla imperdiet convallis in vel dui. Sed vitae turpis non lorem blandit placerat. Curabitur posuere nisl ac felis consectetur, ut ultricies diam faucibus. Nunc laoreet malesuada tellus. Suspendisse efficitur accumsan lacus, ut pretium diam euismod vitae. Vestibulum tincidunt fringilla ligula a interdum.</p>
<p>Quisque luctus purus nec varius finibus. Sed ut lorem scelerisque velit pretium elementum. Maecenas sit amet maximus risus, pretium molestie arcu. Mauris vitae vestibulum lacus. Mauris porttitor aliquet turpis, vel aliquet nisl rutrum quis. Curabitur risus massa, placerat vitae sapien non, egestas efficitur elit. Etiam ut odio non nisl vestibulum venenatis quis ac erat. Curabitur id sem vel eros tristique dignissim ac id neque. Duis elementum, mi ut fringilla pellentesque, ante neque venenatis leo, a pretium nisi massa nec urna. Mauris quam mi, commodo maximus elementum eget, maximus a sapien. Pellentesque nec leo risus.</p>
<p>Etiam non luctus lacus. Aliquam velit nibh, ultrices vitae rhoncus eget, gravida non libero. Aenean lectus purus, ultrices id tincidunt sit amet, feugiat sed turpis. Nam ut turpis cursus ante placerat ultricies. In vitae mauris facilisis lorem maximus accumsan. Curabitur turpis odio, consequat at ante non, mollis porttitor felis. Pellentesque ultricies lacus dapibus diam laoreet venenatis. Phasellus faucibus sollicitudin mi, tempus elementum dui venenatis vitae. In lacinia dui leo, et laoreet eros vehicula nec. Nullam scelerisque ligula non ante luctus porttitor. Donec sed tortor ut felis imperdiet congue eget sit amet dui.</p>
<p>Nullam luctus condimentum augue pharetra facilisis. Mauris laoreet ut odio nec posuere. Maecenas accumsan luctus augue, vitae mollis risus dignissim non. Vivamus nec felis sed sapien porta venenatis. Proin a placerat lacus. Donec ut turpis sed massa mollis aliquet. Vivamus sit amet quam nec urna viverra facilisis. Suspendisse vel erat tellus. In pulvinar justo et quam accumsan tincidunt. Fusce purus est, luctus cursus justo ut, auctor sollicitudin nisl. Integer semper bibendum lorem. Fusce volutpat condimentum lorem vitae vestibulum. Pellentesque eleifend lacus eget sodales egestas. Ut purus urna, maximus quis felis nec, luctus gravida nibh.</p>
<p>Maecenas in lacinia nibh. Morbi non nibh a lorem egestas commodo. Vivamus arcu libero, congue sit amet velit ut, faucibus commodo sem. Mauris at tellus nec est molestie consectetur cursus quis nisi. Etiam vel consequat felis. Curabitur sed dui ac dolor sollicitudin laoreet non nec nunc. Sed bibendum eu est vel posuere. Fusce varius volutpat leo at porta. Curabitur maximus nunc ipsum. Aenean placerat dolor in enim feugiat volutpat. Ut pharetra nulla at lorem rutrum posuere. Integer eu justo nec quam vestibulum aliquet. Praesent aliquam fermentum est vel varius.</p>
<p>Pellentesque imperdiet pharetra molestie. Sed velit tortor, tincidunt et lacus quis, facilisis dapibus ex. Cras et rutrum leo, et sodales augue. In hac habitasse platea dictumst. Nunc acc</p>
</div>
</div>
</div>
So, here we go, transparent fixed header. Run the code in full window and resize the window to see the background of the page changing depending on window width - that's why I couldn't use masking. Spent almost three days looking for it, so hope it helps somebody!

Related

How to set my navigation at bottom of the mobile screen?

The code i got from this website: click here
But i would like to set this nav code at the bottom instead of the top. I also would like it to stick to the bottom of the mobile screen rather than it disappearing after scrolling. Thank you for all the help if you can offer it to me.
I have looked everywhere and this code is perfect. I don't know much about sticking the nav to the bottom or even this code. Its a little complected but i can understand most of it.
Please if you could provide a snippet or if in case you post the code please provide a little more detail on how to place it because i'll be completely lost if you since a small part of the code with no extra help of where it came from. If could if not thats fine i'll figure it out.
(function() {
'use strict';
var nav = document.querySelector('.fixed-nav');
if(!nav) return true;
var navHeight = 0,
navTop = 0,
scrollCurr = 0,
scrollPrev = 0,
scrollDiff = 0;
window.addEventListener('scroll', function() {
navHeight = nav.offsetHeight;
scrollCurr = window.pageYOffset;
scrollDiff = scrollPrev - scrollCurr;
navTop = parseInt(window.getComputedStyle(nav).getPropertyValue('top')) + scrollDiff;
// Scroll to top: fix navbar to top
if(scrollCurr <= 0)
nav.style.top = '0px';
// Scroll up: show navbar
else if(scrollDiff > 0)
nav.style.top = (navTop > 0 ? 0 : navTop) + 'px';
// Scroll down: hide navbar
else if(scrollDiff < 0) {
nav.style.top = (Math.abs(navTop) > navHeight ? - navHeight : navTop) + 'px';
}
// Note last scroll position
scrollPrev = scrollCurr;
});
}());
.fixed-nav {
position: fixed;
top: 0;
left: 0;
width: 100%;
background-color: #ddd;
white-space: nowrap;
height: 50px;
box-sizing: border-box;
padding: 10px;
box-shadow: 0px 3px 6px rgba(0,0,0,0.16),0px 3px 6px rgba(0,0,0,0.23);
}
.fixed-nav ul, .fixed-nav li {
display:inline;
}
.fixed-nav a {
text-decoration: none;
text-transform: uppercase;
padding: 17px 10px;
color: #333;
font-family: arial;
}
.fixed-nav a:hover {
background-color: #000;
color: #eee;
}
.fixed-nav ul {
padding:0;
}
.fixed-nav img {
vertical-align: middle;
}
main {margin-top:55px;}
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<nav class="fixed-nav">
<img src="mf-logo.svg" height="30" />
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
</ul>
</nav>
<main>
<!-- Some dummy content so we can see the fixed navbar staying fixed when we scroll -->
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean rutrum dapibus erat eget sodales. Quisque at maximus tellus. Duis tristique mi magna, ut efficitur lectus porttitor non. Ut bibendum diam turpis, eget vehicula urna dignissim in. Vestibulum eget massa neque. Nulla facilisi. Pellentesque faucibus rutrum eros ut vestibulum. Proin ut nisl malesuada eros auctor viverra non et nibh. Phasellus a felis molestie, fermentum nunc ut, tincidunt felis. Nam quis fermentum velit. Fusce condimentum vehicula porttitor. Aliquam sagittis faucibus urna ac lacinia. Praesent id porta dolor. Donec a pulvinar dui, quis malesuada risus. Cras semper venenatis augue.</p>
<p>Nam molestie eget nulla sit amet hendrerit. Morbi vulputate commodo est, in elementum turpis luctus at. Integer velit urna, tincidunt in aliquam eget, pulvinar in odio. In pharetra sapien mauris, ac sagittis leo venenatis eget. Integer laoreet turpis ac sollicitudin placerat. Curabitur non aliquet massa. Morbi non volutpat enim. Etiam non placerat arcu. In non tellus tempus, consectetur leo ultrices, tincidunt eros. Cras euismod volutpat erat, eget rutrum orci vestibulum sit amet. Mauris eu dui purus. Aliquam condimentum varius nibh, eget consequat nibh commodo non. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Donec vestibulum risus purus, a accumsan massa semper sed. Fusce sit amet est suscipit, consectetur ex sit amet, congue sem.</p>
<p>Etiam blandit magna felis, ac iaculis purus auctor eget. Morbi eleifend, mi a fringilla cursus, dolor erat placerat magna, consectetur imperdiet turpis felis in ante. In ut velit ut eros venenatis consectetur in sed justo. Phasellus posuere, nulla sit amet iaculis cursus, enim mi tincidunt tellus, id auctor eros velit id massa. Suspendisse rutrum vel magna at gravida. Nulla commodo hendrerit lorem, sit amet volutpat massa tristique nec. In accumsan diam ac risus luctus varius. Etiam aliquet, quam eu efficitur eleifend, mi lacus tincidunt neque, at egestas lacus felis quis purus. Aenean lobortis nisi a finibus eleifend. Suspendisse euismod, sapien at viverra aliquam, mauris tortor blandit tortor, fringilla tempor eros urna vitae ligula. Aliquam erat volutpat.</p>
<p>Donec vulputate ex ut risus ullamcorper molestie. Proin interdum, augue ut gravida placerat, quam ipsum maximus neque, pretium semper tellus eros vitae leo. Donec eu eleifend metus. In et urna lacinia urna vulputate faucibus ullamcorper vel erat. Duis vehicula aliquet libero, non convallis erat hendrerit et. Proin ornare pretium pulvinar. Suspendisse potenti. Vestibulum varius magna id lectus finibus mattis. Quisque nulla eros, elementum a dictum quis, tempor et libero. Aenean sollicitudin tellus elit, at lobortis ex tempor ut. Maecenas ac tincidunt enim, vitae tempor nibh. Maecenas malesuada egestas orci, facilisis malesuada metus bibendum a. Aliquam erat volutpat.</p>
<p>Fusce tempor eu quam non rutrum. Donec at nibh erat. Integer congue nisl a aliquet porttitor. Aliquam luctus rutrum metus vitae iaculis. Maecenas rhoncus feugiat massa vel commodo. Aliquam dignissim consectetur lacinia. Quisque finibus nibh nec est lobortis hendrerit. Vivamus ut ex id metus pellentesque lacinia non id ligula. Maecenas non tortor lobortis, fringilla velit sed, lobortis leo. </p>
</main>

Odd results from ie/edge when getting bounding rect of selected text close to document border

Basic fiddle: https://jsfiddle.net/p6790wv9/
When trying to get the bounding rectangle of selected text everything works as expected in Firefox or Chrome but with the same code on IE and Chrome I'm experiencing odd results when selecting the last word* in a row.
For example this is the bounding rectangle when selecting the last word in the first row in Firefox:
{
x: 552.4166870117188,
y: 28.5,
width: 40.866668701171875,
height: 19,
top: 28.5,
right: 593.2833557128906,
bottom: 47.5,
left: 552.4166870117188
}
This is the result from IE 11:
{
bottom: 63.199996948,
constructor: ClientRect {...},
height: 36.799995422,
left: 8, // This is wrong!
right: 597.23999023,
top: 26.399999618,
width: 589.23999023 // ??
}
This is the js code used to obtain the previous two:
var selection = window.getSelection();
if (selection && selection.toString() !== "") {
rect = selection.getRangeAt(0).getBoundingClientRect();
console.log(rect);
}
I'm making sure the selection doesn't include any words from the following row (I just double click the word to select it).
Is this behaviour known/expected? Am I missing something?
EDIT:
*When I wrote last word of a row, I meant the text closer to the right border of the document, sorry it's late o\
Well the first issue is the browser clearly have different default styles and you don't have any CSS specified on the text you are creating your ranges on.
If you specify font-size and line-height and set a wild card pardding and margin to 0 the numbers start get closer.
However some things are being interpreted different.
For example 8pt font with 12pt line-height gives me 15 or 16px rect height (as expected) in IE Edge. But FireFox puts the rectangle height to 12 to 13px height. I am not sure why it varies by one pixel but it is apparent IE's height is based on line height but Firefox's height is based on font' size.
The point is each browser is making uses its own calculations.
document.getElementById("lorem").addEventListener("mouseup", mouseup);
function mouseup() {
selection = window.getSelection();
if (selection && selection.toString() !== "") {
rect = selection.getRangeAt(0).getBoundingClientRect();
console.log(rect);
}
}
* {margin:0px;padding:0px;}
#lorem {
font-size:8pt;
line-height:12pt;
font-family:arial;
}
<body>
<div id="lorem">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis pretium mauris eu turpis rhoncus, et dictum nunc eleifend. Nullam ultricies iaculis lorem, eget faucibus purus ornare et. Aenean et tortor elementum, commodo urna sed, sollicitudin augue. Integer
pharetra iaculis augue, vitae vulputate magna pulvinar ac. Curabitur pretium augue eu mi gravida ultricies. Ut semper luctus nisl a pretium. Aliquam at lacus vel justo porttitor rhoncus sit amet quis mi. Integer ac enim condimentum, malesuada
massa ut, fermentum lacus. Nullam laoreet elit eu diam lacinia euismod. Nullam nec aliquet mauris, et maximus erat. Proin in ex justo. Aliquam dictum nisl vitae molestie tempor. Quisque id turpis at metus dictum ultrices in ac augue. Fusce tempus
tincidunt sem at commodo. Donec dapibus erat sed finibus consequat. Nullam et nisi lacus. Sed diam quam, faucibus vulputate egestas a, consequat a enim. Donec congue velit molestie, vulputate ante quis, finibus odio. Integer et erat sed ligula
egestas ornare sit amet quis nunc. In hac habitasse platea dictumst. Morbi feugiat libero nec lacus elementum malesuada. Fusce dictum turpis velit, in suscipit nibh tincidunt ut. Sed viverra tellus risus, vel laoreet augue lobortis nec. Suspendisse
tincidunt semper ante. Vestibulum sodales risus posuere enim placerat, ut convallis tortor mollis. Curabitur vitae dictum tortor. Curabitur pellentesque, enim eu malesuada placerat, nibh nulla iaculis mi, et vestibulum lorem metus vitae eros.
Ut nec ipsum in libero volutpat placerat. Suspendisse feugiat quam eu mauris elementum, sit amet venenatis velit malesuada. In iaculis eu odio id elementum. Curabitur nec augue ut turpis volutpat auctor ac non nunc. Sed posuere, purus quis accumsan
aliquam, mi sapien ultricies augue, sed bibendum nisl nibh id nulla. Aliquam fermentum elit ac condimentum laoreet. Sed pharetra elit gravida metus vulputate, a pharetra magna finibus. Aenean tincidunt orci sed libero sollicitudin cursus. Donec
sapien nisl, molestie non elementum et, efficitur ut lectus. Nulla scelerisque non arcu et sodales. Aliquam nisi neque, fermentum non arcu in, efficitur fermentum lorem. Proin laoreet magna lorem, a molestie leo sollicitudin efficitur. In hendrerit
purus et nulla lobortis, eget efficitur nisl aliquet. Donec nisl erat, tempus hendrerit lorem iaculis, varius feugiat purus. Aenean ac dolor eget ipsum blandit iaculis vel sed justo. Mauris tortor tortor, interdum vitae lectus id, ultricies vulputate
nibh. Cras convallis, risus eget semper scelerisque, erat urna tincidunt nisl, vel ultricies dui neque a felis. Pellentesque ut ligula vitae tortor tincidunt pellentesque in id nunc. Ut ac dictum quam. Nulla pretium commodo libero, quis tempor
mi pulvinar ac. Aliquam sagittis ex arcu, a scelerisque urna commodo in. Curabitur pharetra posuere efficitur. Mauris blandit urna vel libero euismod faucibus. Pellentesque laoreet magna ex. Vivamus commodo orci et commodo egestas. Nulla vel dapibus
libero.
</div>
</body>

How to disable scrolling programmatically while allowing child scrolling?

Using jQuery/Javascript, I am disabling scrolling within the body if a certain element exists.
Although, this also disables scrolling within all other elements on the page.
$("body").on('scroll touchmove mousewheel', function(e) {
if($("#myElem").length > 0) {
e.preventDefault();
e.stopPropagation();
return false;
}
});
The reason for me doing it without CSS is because the md-backdrop element is controlled by a third-party plugin that I am unable to modify.
How can I only disable scrolling within the body, yet allow scrolling within all my child elements that allow an overflow of scroll or auto?
With the following example, you can see that both the body and red area is scrollable. Once the button is clicked and the myElem element is prepended to the page, both the body and red area has disabled scrolling. I require the body to be disabled, although the red area to still be enabled in this case.
WORKING EXAMPLE
Easiest way is to set the scrollTop() of parent to zero whenever a scroll event on it is detected.
See the working example below.
$(function () {
//fill up show data
var str = "";
for(var i = 0; i < 50; i++) {
str += i + "\n";
}
$(".grandchild pre").text(str);
console.log("started");
//fixed scrolling on parent
$(".parent").on("scroll touchmove mousewheel", function(e) {
console.log('moved ' + $(this).attr('class'));
$(this).scrollTop(0);
}).click(function () {
alert('clicked');
});
});
.parent, .child, .grandchild {
padding : 5px;
overflow: auto;
}
.parent {
border: 1px solid red;
height: 200px;
}
.child {
border: 1px solid green;
height: 400px;
}
.grandchild {
border: 1px solid blue;
height: 800px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class='parent'>
parent
<div class='child'>
child
<div class='grandchild'>
grandchild
<pre></pre>
</div>
</div>
</div>
Read e.target to get the target element for specified-events and apply conditions accordingly.
$("body").on('scroll touchmove mousewheel', function(e) {
if ($("#myElem").length > 0 && (e.target.id !== 'myScroller')) {
e.preventDefault();
e.stopPropagation();
return false;
}
});
$("#myBtn").on("click", function() {
if ($("#myElem").length > 0) {
$("#myElem").remove();
} else if ($("#myElem").length === 0) {
$("body").prepend("<div id='myElem'>This element disables all scrolling since it exists</div>");
}
});
body {
height: 1000px;
background-color: green;
}
#myElem {
background-color: black;
color: white;
}
#myScroller {
height: 300px;
overflow-y: scroll;
background-color: red;
color: white;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
Click the below button to toggle the element that is appended to the body. While scrolling, it will check if that element exists. If it exists, scrolling on the body and within the read area is disabled. Need the body disabled, although red area enabled.
<br />
<br />
<button id="myBtn">
Toggle element
</button>
<div id="myScroller">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam ut viverra diam. Aenean semper mauris vitae libero tempor, tempus mattis turpis imperdiet. Donec a tellus ut elit commodo convallis. Suspendisse eu egestas magna. Sed turpis dolor, lacinia
quis orci sit amet, efficitur pulvinar dui. Sed quis metus turpis. Praesent non venenatis sem. Vestibulum tristique sagittis dignissim. In aliquam est vel nunc luctus, vel cursus dolor eleifend. Pellentesque facilisis tempor dui sed viverra. Mauris
sed viverra libero. Suspendisse nisl mauris, cursus id purus non, iaculis lobortis neque. Duis sed tempor mauris, in dictum lorem. Nunc orci elit, rutrum eu est porttitor, pretium iaculis odio. Aenean eu velit posuere, maximus risus at, egestas mauris.
Nullam at diam diam. Suspendisse vel dui dignissim, laoreet nibh ut, iaculis elit. Quisque eu convallis dui. Quisque cursus, urna vitae mattis consequat, urna orci consectetur urna, commodo malesuada lacus urna eu nunc. Nunc in nunc at leo molestie
aliquam. Nunc interdum sollicitudin rutrum. Nam molestie pulvinar ullamcorper. Sed blandit vestibulum porta. Curabitur semper eu ipsum eu commodo. Nunc faucibus ac orci quis ornare. Morbi ornare leo in mi sodales, eget iaculis enim viverra. Nunc at
ligula tortor. Aenean condimentum a tellus quis congue. Nulla eu hendrerit erat. Donec egestas arcu lacinia mattis mollis. Mauris quis maximus eros. Donec ut risus ultricies, sollicitudin lacus sit amet, aliquet nisi. Aenean pellentesque velit justo,
a eleifend quam consectetur blandit. Praesent quis magna sit amet nibh luctus congue sed lobortis sem. Sed ut aliquet diam. Vestibulum pharetra ex ac lectus iaculis, eu aliquet erat placerat. Donec rutrum lobortis tellus, eu efficitur nibh vulputate
eu. Curabitur placerat id quam vel egestas. Proin consectetur sollicitudin lorem. Integer sollicitudin at quam vel sagittis. Integer sed pretium quam, vitae convallis leo. Suspendisse lorem nulla, imperdiet nec cursus id, auctor quis ante. Integer mollis
vel neque sed commodo. Quisque venenatis nulla quis aliquet porta. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Sed lobortis euismod est sed sagittis. Ut aliquet a tortor id rhoncus. Sed commodo risus
cursus, dignissim nulla vel, molestie ipsum. Cras ac ante luctus diam rutrum placerat eu et risus. Pellentesque sed mauris fringilla nulla imperdiet facilisis a eu leo. Vivamus sollicitudin nibh ac augue ultrices, ut bibendum metus viverra. Donec lectus
urna, lacinia eu bibendum sed, convallis sed ex. Mauris commodo neque sed sollicitudin pharetra. Aenean ac risus ligula. Nunc congue ultrices volutpat. Aenean ac enim porttitor, hendrerit mauris at, ultrices quam. Mauris euismod commodo purus, egestas
semper metus aliquet ac. Quisque nec consectetur sapien. In vestibulum, urna sed lobortis sagittis, sapien ex interdum nisl, id varius orci dolor sit amet dolor. Nunc quis lobortis velit. Praesent viverra eros at nulla pulvinar accumsan. Nulla interdum
urna odio, vel ultricies ante fermentum tincidunt. Sed in nibh quam. Phasellus maximus metus diam, ac vulputate enim fermentum ac. Vestibulum bibendum elit justo, at semper risus consequat ut. Pellentesque facilisis mi et vulputate feugiat. Suspendisse
egestas mauris at elit ullamcorper, non aliquet elit fermentum.
</div>
Edit: Dealing with overflow property of body element will also help!
$("#myBtn").on("click", function() {
$('body').toggleClass('hideIt');
});
body {
height: 1000px;
background-color: green;
}
#myElem {
background-color: black;
color: white;
}
#myScroller {
height: 300px;
overflow-y: scroll;
background-color: red;
color: white;
}
body.hideIt {
overflow: hidden;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
Click the below button to toggle the element that is appended to the body. While scrolling, it will check if that element exists. If it exists, scrolling on the body and within the read area is disabled. Need the body disabled, although red area enabled.
<br />
<br />
<button id="myBtn">
Toggle element
</button>
<div id="myScroller">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam ut viverra diam. Aenean semper mauris vitae libero tempor, tempus mattis turpis imperdiet. Donec a tellus ut elit commodo convallis. Suspendisse eu egestas magna. Sed turpis dolor, lacinia
quis orci sit amet, efficitur pulvinar dui. Sed quis metus turpis. Praesent non venenatis sem. Vestibulum tristique sagittis dignissim. In aliquam est vel nunc luctus, vel cursus dolor eleifend. Pellentesque facilisis tempor dui sed viverra. Mauris
sed viverra libero. Suspendisse nisl mauris, cursus id purus non, iaculis lobortis neque. Duis sed tempor mauris, in dictum lorem. Nunc orci elit, rutrum eu est porttitor, pretium iaculis odio. Aenean eu velit posuere, maximus risus at, egestas mauris.
Nullam at diam diam. Suspendisse vel dui dignissim, laoreet nibh ut, iaculis elit. Quisque eu convallis dui. Quisque cursus, urna vitae mattis consequat, urna orci consectetur urna, commodo malesuada lacus urna eu nunc. Nunc in nunc at leo molestie
aliquam. Nunc interdum sollicitudin rutrum. Nam molestie pulvinar ullamcorper. Sed blandit vestibulum porta. Curabitur semper eu ipsum eu commodo. Nunc faucibus ac orci quis ornare. Morbi ornare leo in mi sodales, eget iaculis enim viverra. Nunc at
ligula tortor. Aenean condimentum a tellus quis congue. Nulla eu hendrerit erat. Donec egestas arcu lacinia mattis mollis. Mauris quis maximus eros. Donec ut risus ultricies, sollicitudin lacus sit amet, aliquet nisi. Aenean pellentesque velit justo,
a eleifend quam consectetur blandit. Praesent quis magna sit amet nibh luctus congue sed lobortis sem. Sed ut aliquet diam. Vestibulum pharetra ex ac lectus iaculis, eu aliquet erat placerat. Donec rutrum lobortis tellus, eu efficitur nibh vulputate
eu. Curabitur placerat id quam vel egestas. Proin consectetur sollicitudin lorem. Integer sollicitudin at quam vel sagittis. Integer sed pretium quam, vitae convallis leo. Suspendisse lorem nulla, imperdiet nec cursus id, auctor quis ante. Integer mollis
vel neque sed commodo. Quisque venenatis nulla quis aliquet porta. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Sed lobortis euismod est sed sagittis. Ut aliquet a tortor id rhoncus. Sed commodo risus
cursus, dignissim nulla vel, molestie ipsum. Cras ac ante luctus diam rutrum placerat eu et risus. Pellentesque sed mauris fringilla nulla imperdiet facilisis a eu leo. Vivamus sollicitudin nibh ac augue ultrices, ut bibendum metus viverra. Donec lectus
urna, lacinia eu bibendum sed, convallis sed ex. Mauris commodo neque sed sollicitudin pharetra. Aenean ac risus ligula. Nunc congue ultrices volutpat. Aenean ac enim porttitor, hendrerit mauris at, ultrices quam. Mauris euismod commodo purus, egestas
semper metus aliquet ac. Quisque nec consectetur sapien. In vestibulum, urna sed lobortis sagittis, sapien ex interdum nisl, id varius orci dolor sit amet dolor. Nunc quis lobortis velit. Praesent viverra eros at nulla pulvinar accumsan. Nulla interdum
urna odio, vel ultricies ante fermentum tincidunt. Sed in nibh quam. Phasellus maximus metus diam, ac vulputate enim fermentum ac. Vestibulum bibendum elit justo, at semper risus consequat ut. Pellentesque facilisis mi et vulputate feugiat. Suspendisse
egestas mauris at elit ullamcorper, non aliquet elit fermentum.
</div>

How can I make my sidebar fixed after a certain size?

I see this sample:
link
If you do come down ... you see the sidebar on the right becomes fixed after a certain size ... you actually get down to almost everything.
How it was made an event the example?
With JQuery?
This is the link to my site
I tried to do something similar but incomplete
CODE JS:
$(window).scroll(function() {
var height = $(window).scrollTop();
console.log(height);
if(height > 700) {
//alert("test");
//after a certain size should be fixed ... what code should be here?
}
});
Did you have any idea as an example?
Can you help me solve this problem please?
Thanks in advance!
Here the example of not smooth scrolling of div.
(function($) {
var element = $('.follow-scroll'),
originalY = element.offset().top;
// Space between element and top of screen (when scrolling)
var topMargin = 20;
// Should probably be set in CSS; but here just for emphasis
element.css('position', 'relative');
$(window).on('scroll', function(event) {
var scrollTop = $(window).scrollTop();
element.stop(false, false).animate({
top: scrollTop < originalY
? 0
: scrollTop - originalY + topMargin
}, 0);
});
})(jQuery);
html { box-sizing: border-box; }
*, *:before, *:after { box-sizing: inherit; }
.group:after { content: ""; display: table; clear: both; }
body { font: 15px/20px sans-serif; color: #444; }
p { margin-bottom: 30px; }
.wrapper { width: 100%; max-width: 700px; padding: 3%; }
.content, .sidebar { float: left; }
.content { width: 68%; margin-right: 5%; }
.sidebar { width: 27%; }
.box { background: #eee; border: 1px solid #ccc; padding: 10px; margin-bottom: 20px; }
<div class="wrapper group">
<div class="content">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam euismod arcu ut diam maximus auctor. Sed malesuada maximus tellus, dignissim volutpat urna hendrerit at. Cras nisi turpis, mattis vitae ornare ut, bibendum et massa. Nulla at tellus a arcu luctus ultrices ac non felis. Maecenas euismod efficitur ipsum vel vestibulum. Nam imperdiet ipsum nunc, sit amet varius felis maximus quis. Etiam efficitur, mauris placerat luctus facilisis, ligula sem pellentesque nunc, ac viverra tellus velit sit amet purus. Proin a nunc id quam tempor blandit vitae id orci. Cras lectus turpis, varius nec elementum venenatis, suscipit ut nisl.</p>
<p>Nulla condimentum est in leo mollis, sit amet varius erat pulvinar. Donec posuere turpis non est ultrices lobortis. Donec commodo aliquam sodales. Ut id finibus velit. Aenean tempus eget nulla at condimentum. Ut a arcu quis dui ultricies efficitur. Vestibulum suscipit diam ullamcorper velit tempor, in ullamcorper odio sollicitudin. Vestibulum congue nisl nibh, ut elementum quam tristique non. Nulla in sollicitudin dolor. Morbi ac justo nulla. Suspendisse massa neque, vestibulum id dolor non, congue rhoncus nibh.</p>
<p>Phasellus porta tellus vel ipsum vehicula, nec fermentum lectus porta. Aenean viverra magna eu risus lacinia malesuada. Sed molestie auctor pharetra. Aliquam erat volutpat. Vestibulum in mi a orci tincidunt pellentesque. Sed et lectus eros. Nam imperdiet neque eu dolor gravida, interdum pellentesque justo rhoncus. Morbi tincidunt, ex nec pellentesque pulvinar, dui nulla tempor ipsum, sed consequat est tortor at neque. Suspendisse sed consequat urna. Nullam luctus, sem convallis volutpat mollis, sapien odio finibus elit, vitae fringilla enim leo sed velit. Vivamus fringilla ante laoreet blandit porta. Sed condimentum ut erat nec dignissim.</p>
<p>Morbi ac scelerisque metus. Donec rhoncus diam urna, nec aliquet ex mollis ut. Sed a arcu ac risus semper pellentesque ut non nibh. Phasellus eu ullamcorper sem. Maecenas at tortor faucibus, consequat risus sed, egestas sapien. Suspendisse tortor lacus, congue sed velit vel, dictum sagittis eros. Proin eu nisl viverra, mattis velit vitae, tempor turpis. Ut sodales lacus in iaculis faucibus. Integer non metus non nulla malesuada rutrum ac non ipsum. Vivamus quam diam, suscipit sed velit vel, tincidunt imperdiet urna. Praesent dapibus augue a dignissim lacinia. Nullam pharetra volutpat ligula, quis aliquet mauris pharetra nec. Etiam finibus, neque in laoreet vehicula, lorem justo feugiat velit, ac accumsan neque lacus non tellus. Aliquam quis sagittis massa, a bibendum enim.</p>
<p>Morbi vel elementum libero, vitae viverra est. Pellentesque sollicitudin neque at ligula suscipit, vel faucibus mauris consequat. Donec quis pharetra nulla, at tristique lacus. Nunc vel magna ultricies, hendrerit purus et, rhoncus dolor. Aliquam erat volutpat. Phasellus auctor malesuada augue, a iaculis sem mattis quis. Nulla facilisi.</p>
</div>
<div class="sidebar">
<div class="box">
First box
</div>
<div class="box">
Second box
</div>
<div class="box follow-scroll">
Third box (follows screen)
</div>
</div>
</div>

How Do I Limit Scrolling to a Fixed Div?

I have two divs, structured as follows:
<div id="container">
<div id="inner"></div>
</div>
The outer, container div has a very large height (this is simply meant to emulate a real-world scenario where there's a lot of content in the parent div). The inner div is a fixed position div, with a defined height. Overflow-y is set on the inner div, so that people can scroll through it to see any content that doesn't fit within its defined height.
Here's a codepen: http://codepen.io/anon/pen/myVxar
How do I set it such that when you're done scrolling through the inner div, the outer div does not scroll? In other words, scrolling within the inner div should never scroll the outer div.
Is there a way to do this using CSS/HTML? If not, how would I do it using Javascript/Jquery?
You can't disable the scroll for the page but you can disable the mousewheel event
Edit: I do have to say that if you are running into this in the real world and you have full control over the front end code you should rethink you're strategy, because there is most definitely a better way.
function preventDefault(e) {
e = e || window.event;
if (e.preventDefault)
e.preventDefault();
e.returnValue = false;
}
function wheel(e) {
preventDefault(e)
}
// bind some scroll functionality to the inner div
$('#inner').on('scroll', function(e){
var elem = $(e.currentTarget);
// check if user has scrolled to bottom
if (elem[0].scrollHeight - elem.scrollTop() == elem.outerHeight()){
// disable mouse scroll event
if (window.addEventListener) {
window.addEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = wheel;
console.log('done')
} else{
// remove the event that disables scroll
if (window.removeEventListener) {
window.removeEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = document.onkeydown = null;
}
});
// remove the event that disabled scroll if user mouse leaves inner container
$('#inner').mouseout(function(e){
if (window.removeEventListener) {
window.removeEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = document.onkeydown = null;
})
Also wondering why you are taking this approach. I think you may be setting the large height in case the content is long, but why not just do something like this?
#container {
height:200px;
width:300px;
overflow:scroll;
border:1px solid;
}
Once the inner content overflows the container, the container will scroll - the .inner doesn't need any styling relating to the scrolling. Post more detail if I am missing something.
Assuming that the inner div isn't always covering other content... You could just adjust the height and overflow of the container when you show the inner div:
Working Example
$('#container').click(function () {
if ($('#inner').is(':visible')) {
$('#inner').fadeOut('slow');
$('#container').css({
height: 14000,
overflow: 'auto'
});
} else {
$('#inner').fadeIn('slow', function () {
$('#container').css({
height: "100%",
overflow: 'hidden'
});
});
}
});
#container {
height: 14000px;
width: 100%;
}
#inner {
display:none;
background: #fff;
position: fixed;
top: 0;
left: 0;
height: 100vh;
width: 100%;
overflow-y: scroll;
box-sizing: border-box;
padding: 15px;
font-size: 18px;
color: #808080;
}
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