I would like to create a button using that floats until footer and then stops
1) Button should be poisition: fixed; bottom: 0px when footer is not visible
2) When footer becomes visible, button should just sit on top of footer
The button should handle following cases.
when states change in angular, when we get data from server the footer is visible for a moment and then the page expands, what will happen then?
when the page has less content and footer is visible, button should sit on top of footer.
How can i do this?
Here is the plunker i started to play around with
http://plnkr.co/edit/SoCBjkUjFICiuTeTPxDB?p=preview
I came across this post when searching for a similar solution. Without a ready answer, this is what I ended up doing, based on this post https://ngmilk.rocks/2015/04/09/angularjs-sticky-navigation-directive/ .
Basicly you need a $scope.$watch to watch for scope change, and an event handler attached to the onscroll event.
angular.module('myApp')
.directive('stickyBottom', function($window) {
return {
restrict: 'A',
scope: {},
link: function (scope, elem, attrs) {
// the element box saved for later reference
var elemRect;
// element height
var height = elem[0].clientHeight;
// element top, will be changed as scope is updated
var top = 0;
// updates element's original position
scope.$watch(function(){
elemRect = elem[0].getBoundingClientRect();
return elemRect.top + $window.pageYOffset;
}, function(newVal, oldVal){
// this is the original element position, save it
if(!elem.hasClass('fixed-bottom')){
top = newVal;
}
// properly position the element even in `fixed` display
elem.css('width', elemRect.width);
elem.css('left', elemRect.left);
// check position
toggleClass();
});
// toggle `fixed-bottom` class based on element's position
var toggleClass = function() {
// the element is hidden
if (elem[0].getBoundingClientRect().top + height > $window.innerHeight) {
elem.addClass('fixed-bottom');
}
// the element is visible
else {
// the element is visible in its original position
if (top - $window.pageYOffset + height < $window.innerHeight && elem.hasClass('fixed-bottom')) {
elem.removeClass('fixed-bottom');
}
}
}
// bind to `onscroll` event
$window.onscroll = function() {
toggleClass();
};
}
};
})
;
And here's some css:
.fixed-bottom {
position: fixed;
top: auto;
bottom: 0;
}
You can accomplish this affect without using angular at all by modifying your style.css. The simplest solution in this case is just to set the bottom parameter of the #to-top element to be at minimum higher than the footer, for example:
#to-top {
position:fixed;
bottom: 60px;
right: 10px;
width: 100px;
padding: 5px;
border: 1px solid #ccc;
background: red;
color: white;
font-weight: bold;
text-align: center;
cursor: pointer;
}
I have boxes that contain <ul> list content. These boxes have a slightly variable width but have a fixed height. This list content is dynamically generated containing anywhere from 0 - 200 list elements. However, because of the box height, I usually can display only 3-5 at a time. This is OK.
However, I have been artificially restricting those lists by using ASP.NET MVC code to only display the first 4 elements. This works in about 90% of cases - some boxes will still have overflow if all of the list items have a lot of text (see below).
I was wondering if there was a way in CSS to use like the overflow property or something and hide the list elements that don't fit? I have tried overflow: hidden on the <ul> to no avail. I imagine this is because the list doesn't know the height of the box that is is in or something
Clarification: Ideally, you wouldn't see any part of the <li> that doesn't fit. See this fiddle
I don't know how long any of these items will be ahead of time or how many elements their might even be, and the width/height of the box are not modifiable. Any ideas?
Original Fiddle: http://jsfiddle.net/emowbngx/1/
Example of Box HTML:
<div class="box">
<ul>
<li>List item</li>
<li>these LI's are dynamically generated</li>
<li>I have no idea of their length ahead of time</li>
<li>Seth Rollins</li>
</ul>
</div>
Box CSS:
.box {
height: 110px;
width: 350px;
min-width: 350px;
float: left;
margin: 8px 16px 8px 0;
position: relative;
border: 1px solid black;
}
I may have found a way to do this using a pure CSS solution. It involves using flexbox and a bit of cheating to show the bullet using a :before pseudo element.
It even allows centering visible li elements vertically inside the container.
fiddle: https://jsfiddle.net/aq34sb17/2/
CSS
ul {
display: flex;
flex-direction: column;
flex-wrap: wrap;
height: 100px;
max-width: 180px;
overflow: hidden;
padding-left: 15px;
justify-content: space-around;
}
li {
display: block;
width: 100%;
padding-left: 10px;
position: relative;
}
li:before {
content: '\2022';
position: absolute;
left: -5px;
}
and here's the solution applied to your fiddle: http://jsfiddle.net/emowbngx/7/
Here's my solution :
http://jsfiddle.net/gc5un34j/3/
Using element.offsetHeight to get the height of each element of your list and then comparing it to the container;
JQuery:
var listItems = $('ul li'); //The list rows
var listContainer = $('ul'); //The list
var listHeight = 0; //Contains the height of the 4 elements together
for(var i = 0; i < listItems.length; i++) {
listHeight += listItems[i].offsetHeight;
//If the row is bigger than the container, hides it, [0] to access the DOM Element
if(listContainer[0].offsetHeight < listHeight) {
$(listItems[i]).hide();
}
}
Pure JS in browsers supporting QuerySelectors:
var listItems = document.querySelectorAll('ul li'); //The list rows
var listContainer = document.querySelector('ul'); //The list
var listHeight = 0; //Contains the height of the 4 elements together
for(var i = 0; i < listItems.length; i++) {
listHeight += listItems[i].offsetHeight;
//If the row is bigger than the container, hides it
if(listContainer.offsetHeight < listHeight) {
listItems[i].style.display = 'none';
}
}
Tested in Chrome 44 and Firefox
This will not remove (always!) last child, but, maybe it could be solution (even nicer, imho):
http://jsfiddle.net/emowbngx/6/
$('.box').each(function(i) {
if ($(this).children().height() > $(this).height())
{
//$(this).find('li:last-child').css('display','none');
$(this).find('li').each(function(j) {
if ($(this).position().top + $(this).height() > $('.box').height()) {
$(this).css('display', 'none');
}
});
}
});
Note: didn't test it too long, try to change text in li's, and see by your self...
I'm trying to get a vertical-align to work on a div whose display is table-cell.
See http://jsfiddle.net/midnitesonnet/Rwahk/ for html/css.
I can't seem get the to display vertically align to the bottom. Any help would be much appreciated.
Thanks.
You define display:table-cell & position:absolute which create a problem. Just remove your .title DIV height.
#whats_available .title {
position: absolute;
z-index: 1000;
bottom: 0;
left: 0;
text-align: center !important;
width: 100%;
color: #fff;
}
Check this http://jsfiddle.net/Rwahk/5/
http://jsfiddle.net/Rwahk/7/ works as you wanted...
The changes made were to add display: table; to the #whats_available > div and to change the .title to position: relative;
You should change the height of the inner div to something like 30px instead of 100%
http://jsfiddle.net/Rwahk/4/
You shouldn't use dimensions attributes in pure html (the only exception could be image but it's still a bad idea).
I wrote this small jQuery function which might comes in handy to you or to other readers.
jQuery.fn.center = function () {
this.css("position","absolute");
this.css("top", (($(window).height() - this.outerHeight()) / 2) + $(window).scrollTop() + "px");
this.css("left", (($(window).width() - this.outerWidth()) / 2) + $(window).scrollLeft() + "px");
return this;
}
use:
$(selector).center();
Enjoy and have a great day :)
This question already has answers here:
Fixed page header overlaps in-page anchors
(38 answers)
Closed 7 years ago.
I am trying to clean up the way my anchors work. I have a header that is fixed to the top of the page, so when you link to an anchor elsewhere in the page, the page jumps so the anchor is at the top of the page, leaving the content behind the fixed header (I hope that makes sense). I need a way to offset the anchor by the 25px from the height of the header. I would prefer HTML or CSS, but Javascript would be acceptable as well.
You could just use CSS without any javascript.
Give your anchor a class:
<a class="anchor" id="top"></a>
You can then position the anchor an offset higher or lower than where it actually appears on the page, by making it a block element and relatively positioning it. -250px will position the anchor up 250px
a.anchor {
display: block;
position: relative;
top: -250px;
visibility: hidden;
}
I found this solution:
<a name="myanchor">
<h1 style="padding-top: 40px; margin-top: -40px;">My anchor</h1>
</a>
This doesn't create any gap in the content and anchor links works really nice.
I was looking for a solution to this as well. In my case, it was pretty easy.
I have a list menu with all the links:
<ul>
<li>one</li>
<li>two</li>
<li>three</li>
<li>four</li>
</ul>
And below that the headings where it should go to.
<h3>one</h3>
<p>text here</p>
<h3>two</h3>
<p>text here</p>
<h3>three</h3>
<p>text here</p>
<h3>four</h3>
<p>text here</p>
Now because I have a fixed menu at the top of my page I can't just make it go to my tag because that would be behind the menu.
Instead, I put a span tag inside my tag with the proper id.
<h3><span id="one"></span>one</h3>
Now use 2 lines of CSS to position them properly.
h3{ position:relative; }
h3 span{ position:absolute; top:-200px;}
Change the top value to match the height of your fixed header (or more).
Now I assume this would work with other elements as well.
FWIW this worked for me:
[id]::before {
content: '';
display: block;
height: 75px;
margin-top: -75px;
visibility: hidden;
}
As this is a concern of presentation, a pure CSS solution would be ideal. However, this question was posed in 2012, and although relative positioning / negative margin solutions have been suggested, these approaches seem rather hacky, create potential flow issues, and cannot respond dynamically to changes in the DOM / viewport.
With that in mind I believe that using JavaScript is still (February 2017) the best approach. Below is a vanilla-JS solution which will respond both to anchor clicks and resolve the page hash on load (See JSFiddle). Modify the .getFixedOffset() method if dynamic calculations are required. If you're using jQuery, here's a modified solution with better event delegation and smooth scrolling.
(function(document, history, location) {
var HISTORY_SUPPORT = !!(history && history.pushState);
var anchorScrolls = {
ANCHOR_REGEX: /^#[^ ]+$/,
OFFSET_HEIGHT_PX: 50,
/**
* Establish events, and fix initial scroll position if a hash is provided.
*/
init: function() {
this.scrollToCurrent();
window.addEventListener('hashchange', this.scrollToCurrent.bind(this));
document.body.addEventListener('click', this.delegateAnchors.bind(this));
},
/**
* Return the offset amount to deduct from the normal scroll position.
* Modify as appropriate to allow for dynamic calculations
*/
getFixedOffset: function() {
return this.OFFSET_HEIGHT_PX;
},
/**
* If the provided href is an anchor which resolves to an element on the
* page, scroll to it.
* #param {String} href
* #return {Boolean} - Was the href an anchor.
*/
scrollIfAnchor: function(href, pushToHistory) {
var match, rect, anchorOffset;
if(!this.ANCHOR_REGEX.test(href)) {
return false;
}
match = document.getElementById(href.slice(1));
if(match) {
rect = match.getBoundingClientRect();
anchorOffset = window.pageYOffset + rect.top - this.getFixedOffset();
window.scrollTo(window.pageXOffset, anchorOffset);
// Add the state to history as-per normal anchor links
if(HISTORY_SUPPORT && pushToHistory) {
history.pushState({}, document.title, location.pathname + href);
}
}
return !!match;
},
/**
* Attempt to scroll to the current location's hash.
*/
scrollToCurrent: function() {
this.scrollIfAnchor(window.location.hash);
},
/**
* If the click event's target was an anchor, fix the scroll position.
*/
delegateAnchors: function(e) {
var elem = e.target;
if(
elem.nodeName === 'A' &&
this.scrollIfAnchor(elem.getAttribute('href'), true)
) {
e.preventDefault();
}
}
};
window.addEventListener(
'DOMContentLoaded', anchorScrolls.init.bind(anchorScrolls)
);
})(window.document, window.history, window.location);
Pure css solution inspired by Alexander Savin:
a[name] {
padding-top: 40px;
margin-top: -40px;
display: inline-block; /* required for webkit browsers */
}
Optionally you may want to add the following if the target is still off the screen:
vertical-align: top;
My solution combines the target and before selectors for our CMS. Other techniques don't account for text in the anchor. Adjust the height and the negative margin to the offset you need...
:target::before {
content: '';
display: block;
height: 180px;
margin-top: -180px;
}
This takes many elements from previous answers and combines into a tiny (194 bytes minified) anonymous jQuery function. Adjust fixedElementHeight for the height of your menu or blocking element.
(function($, window) {
var adjustAnchor = function() {
var $anchor = $(':target'),
fixedElementHeight = 100;
if ($anchor.length > 0) {
$('html, body')
.stop()
.animate({
scrollTop: $anchor.offset().top - fixedElementHeight
}, 200);
}
};
$(window).on('hashchange load', function() {
adjustAnchor();
});
})(jQuery, window);
If you don't like the animation, replace
$('html, body')
.stop()
.animate({
scrollTop: $anchor.offset().top - fixedElementHeight
}, 200);
with:
window.scrollTo(0, $anchor.offset().top - fixedElementHeight);
Uglified version:
!function(o,n){var t=function(){var n=o(":target"),t=100;n.length>0&&o("html, body").stop().animate({scrollTop:n.offset().top-t},200)};o(n).on("hashchange load",function(){t()})}(jQuery,window);
For modern browsers, just add the CSS3 :target selector to the page. This will apply to all the anchors automatically.
:target {
display: block;
position: relative;
top: -100px;
visibility: hidden;
}
You can do it without js and without altering html. It´s css-only.
a[id]::before {
content: '';
display: block;
height: 50px;
margin: -30px 0 0;
}
That will append a pseudo-element before every a-tag with an id. Adjust values to match the height of your header.
I had been facing a similar issue, unfortunately after implementing all the solutions above, I came to the following conclusion.
My inner elements had a fragile CSS structure and implementing a position relative / absolute play, was completely breaking the page design.
CSS is not my strong suit.
I wrote this simple scrolling js, that accounts for the offset caused due to the header and relocated the div about 125 pixels below. Please use it as you see fit.
The HTML
<div id="#anchor"></div> <!-- #anchor here is the anchor tag which is on your URL -->
The JavaScript
$(function() {
$('a[href*=#]:not([href=#])').click(function() {
if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'')
&& location.hostname == this.hostname) {
var target = $(this.hash);
target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
if (target.length) {
$('html,body').animate({
scrollTop: target.offset().top - 125 //offsets for fixed header
}, 1000);
return false;
}
}
});
//Executed on page load with URL containing an anchor tag.
if($(location.href.split("#")[1])) {
var target = $('#'+location.href.split("#")[1]);
if (target.length) {
$('html,body').animate({
scrollTop: target.offset().top - 125 //offset height of header here too.
}, 1000);
return false;
}
}
});
See a live implementation here.
For the same issue, I used an easy solution : put a padding-top of 40px on each anchor.
As #moeffju suggests, this can be achieved with CSS. The issue I ran into (which I'm surprised I haven't seen discussed) is the trick of overlapping previous elements with padding or a transparent border prevents hover and click actions at the bottom of those sections because the following one comes higher in the z-order.
The best fix I found was to place section content in a div that is at z-index: 1:
// Apply to elements that serve as anchors
.offset-anchor {
border-top: 75px solid transparent;
margin: -75px 0 0;
-webkit-background-clip: padding-box;
-moz-background-clip: padding;
background-clip: padding-box;
}
// Because offset-anchor causes sections to overlap the bottom of previous ones,
// we need to put content higher so links aren't blocked by the transparent border.
.container {
position: relative;
z-index: 1;
}
Solutions with changing position property are not always possible (it can destroy layout) therefore I suggest this:
HTML:
<a id="top">Anchor</a>
CSS:
#top {
margin-top: -250px;
padding-top: 250px;
}
Use this:
<a id="top"> </a>
to minimize overlapping, and set font-size to 1px. Empty anchor will not work in some browsers.
Borrowing some of the code from an answer given at this link (no author is specified), you can include a nice smooth-scroll effect to the anchor, while making it stop at -60px above the anchor, fitting nicely underneath the fixed bootstrap navigation bar (requires jQuery):
$(".dropdown-menu a[href^='#']").on('click', function(e) {
// prevent default anchor click behavior
e.preventDefault();
// animate
$('html, body').animate({
scrollTop: $(this.hash).offset().top - 60
}, 300, function(){
});
});
The above methods don't work very well if your anchor is a table element or within a table (row or cell).
I had to use javascript and bind to the window hashchange event to work around this (demo):
function moveUnderNav() {
var $el, h = window.location.hash;
if (h) {
$el = $(h);
if ($el.length && $el.closest('table').length) {
$('body').scrollTop( $el.closest('table, tr').position().top - 26 );
}
}
}
$(window)
.load(function () {
moveUnderNav();
})
.on('hashchange', function () {
moveUnderNav();
});
* Note: The hashchange event is not available in all browsers.
You can achieve this without an ID using the a[name]:not([href]) css selector. This simply looks for links with a name and no href e.g. <a name="anc1"></a>
An example rule might be:
a[name]:not([href]){
display: block;
position: relative;
top: -100px;
visibility: hidden;
}
Instead of having a fixed-position navbar which is underlapped by the rest of the content of the page (with the whole page body being scrollable), consider instead having a non-scrollable body with a static navbar and then having the page content in an absolutely-positioned scrollable div below.
That is, have HTML like this...
<div class="static-navbar">NAVBAR</div>
<div class="scrollable-content">
<p>Bla bla bla</p>
<p>Yadda yadda yadda</p>
<p>Mary had a little lamb</p>
<h2 id="stuff-i-want-to-link-to">Stuff</h2>
<p>More nonsense</p>
</div>
... and CSS like this:
.static-navbar {
height: 100px;
}
.scrollable-content {
position: absolute;
top: 100px;
bottom: 0;
overflow-y: scroll;
width: 100%;
}
There is one significant downside to this approach, however, which is that while an element from the page header is focused, the user will not be able to scroll the page using the keyboard (e.g. via the up and down arrows or the Page Up and Page Down keys).
Here's a JSFiddle demonstrating this in action.
This was inspired by the answer by Shouvik - same concept as his, only the size of the fixed header isn't hard coded. As long as your fixed header is in the first header node, this should "just work"
/*jslint browser: true, plusplus: true, regexp: true */
function anchorScroll(fragment) {
"use strict";
var amount, ttarget;
amount = $('header').height();
ttarget = $('#' + fragment);
$('html,body').animate({ scrollTop: ttarget.offset().top - amount }, 250);
return false;
}
function outsideToHash() {
"use strict";
var fragment;
if (window.location.hash) {
fragment = window.location.hash.substring(1);
anchorScroll(fragment);
}
}
function insideToHash(nnode) {
"use strict";
var fragment;
fragment = $(nnode).attr('href').substring(1);
anchorScroll(fragment);
}
$(document).ready(function () {
"use strict";
$("a[href^='#']").bind('click', function () {insideToHash(this); });
outsideToHash();
});
I'm facing this problem in a TYPO3 website, where all "Content Elements" are wrapped with something like:
<div id="c1234" class="contentElement">...</div>
and i changed the rendering so it renders like this:
<div id="c1234" class="anchor"></div>
<div class="contentElement">...</div>
And this CSS:
.anchor{
position: relative;
top: -50px;
}
The fixed topbar being 40px high, now the anchors work again and start 10px under the topbar.
Only drawback of this technique is you can no longer use :target.
Adding to Ziav's answer (with thanks to Alexander Savin), I need to be using the old-school <a name="...">...</a> as we're using <div id="...">...</div> for another purpose in our code. I had some display issues using display: inline-block -- the first line of every <p> element was turning out to be slightly right-indented (on both Webkit and Firefox browsers). I ended up trying other display values and display: table-caption works perfectly for me.
.anchor {
padding-top: 60px;
margin-top: -60px;
display: table-caption;
}
I added 40px-height .vspace element holding the anchor before each of my h1 elements.
<div class="vspace" id="gherkin"></div>
<div class="page-header">
<h1>Gherkin</h1>
</div>
In the CSS:
.vspace { height: 40px;}
It's working great and the space is not chocking.
how about hidden span tags with linkable IDs that provide the height of the navbar:
#head1 {
padding-top: 60px;
height: 0px;
visibility: hidden;
}
<span class="head1">somecontent</span>
<h5 id="headline1">This Headline is not obscured</h5>
heres the fiddle: http://jsfiddle.net/N6f2f/7
You can also add an anchor with follow attr:
(text-indent:-99999px;)
visibility: hidden;
position:absolute;
top:-80px;
and give the parent container a position relative.
Works perfect for me.
A further twist to the excellent answer from #Jan is to incorporate this into the #uberbar fixed header, which uses jQuery (or MooTools). (http://davidwalsh.name/persistent-header-opacity)
I've tweaked the code so the the top of the content is always below not under the fixed header and also added the anchors from #Jan again making sure that the anchors are always positioned below the fixed header.
The CSS:
#uberbar {
border-bottom:1px solid #0000cc;
position:fixed;
top:0;
left:0;
z-index:2000;
width:100%;
}
a.anchor {
display: block;
position: relative;
visibility: hidden;
}
The jQuery (including tweaks to both the #uberbar and the anchor approaches:
<script type="text/javascript">
$(document).ready(function() {
(function() {
//settings
var fadeSpeed = 200, fadeTo = 0.85, topDistance = 30;
var topbarME = function() { $('#uberbar').fadeTo(fadeSpeed,1); }, topbarML = function() { $('#uberbar').fadeTo(fadeSpeed,fadeTo); };
var inside = false;
//do
$(window).scroll(function() {
position = $(window).scrollTop();
if(position > topDistance && !inside) {
//add events
topbarML();
$('#uberbar').bind('mouseenter',topbarME);
$('#uberbar').bind('mouseleave',topbarML);
inside = true;
}
else if (position < topDistance){
topbarME();
$('#uberbar').unbind('mouseenter',topbarME);
$('#uberbar').unbind('mouseleave',topbarML);
inside = false;
}
});
$('#content').css({'margin-top': $('#uberbar').outerHeight(true)});
$('a.anchor').css({'top': - $('#uberbar').outerHeight(true)});
})();
});
</script>
And finally the HTML:
<div id="uberbar">
<!--CONTENT OF FIXED HEADER-->
</div>
....
<div id="content">
<!--MAIN CONTENT-->
....
<a class="anchor" id="anchor1"></a>
....
<a class="anchor" id="anchor2"></a>
....
</div>
Maybe this is useful to somebody who likes the #uberbar fading dixed header!
#AlexanderSavin's solution works great in WebKit browsers for me.
I additionally had to use :target pseudo-class which applies style to the selected anchor to adjust padding in FF, Opera & IE9:
a:target {
padding-top: 40px
}
Note that this style is not for Chrome / Safari so you'll probably have to use css-hacks, conditional comments etc.
Also I'd like to notice that Alexander's solution works due to the fact that targeted element is inline. If you don't want link you could simply change display property:
<div id="myanchor" style="display: inline">
<h1 style="padding-top: 40px; margin-top: -40px;">My anchor</h1>
</div>
Here's the solution that we use on our site. Adjust the headerHeight variable to whatever your header height is. Add the js-scroll class to the anchor that should scroll on click.
// SCROLL ON CLICK
// --------------------------------------------------------------------------
$('.js-scroll').click(function(){
var headerHeight = 60;
$('html, body').animate({
scrollTop: $( $.attr(this, 'href') ).offset().top - headerHeight
}, 500);
return false;
});
I ran into this same issue and ended up handling the click events manually, like:
$('#mynav a').click(() ->
$('html, body').animate({
scrollTop: $($(this).attr('href')).offset().top - 40
}, 200
return false
)
Scroll animation optional, of course.