Scroll to link with skrollr - javascript

I am using https://github.com/Prinzhorn/skrollr to animate the background of my site as I scroll. However I am also wanting to have my links scroll up and down the page like a normal single page site would do.
The problem is that both are working if I manually scroll the background changes, if I click the link the page scrolls to the correct place. The problem is that when I click the button the background doesn't scroll as well.
It seems like I am working with two different scroll functions and as a result they aren't working together and I need to use the same one.
Here is the code.
js - Scroll to link:
var $root = $('html, body');
$('a').click(function() {
var href = $.attr(this, 'href');
$root.animate({
scrollTop: $(href).offset().top
}, 500, function () {
window.location.hash = href;
});
return false;
});
js – Skrollr init
skrollr.init({
smoothScrolling: true,
forceHeight: true
});
I will try put together a fiddle to make it more clear but hopefully the answer is really simple.

If anyone else ever faces this problem the answer lies her: https://github.com/Prinzhorn/skrollr-menu
This will allow you to scroll to you internal links along with Skrollr animations. A HUGE plus and a very simple fix, you don't even need any of your own scrolling code just this and it will work with you links.

There's a way to do this, Skrollr has some methods very useful, in console, just type the variable contains skrollr, it will show some methods that you can use, one of them is "setScrollTop(int, bool)", so just call this method with the info you need, for example:
s.setScrollTop(9000, true)
Which means that I want it to scroll to the height position 9000. It works fine, you just need to know the height position where you need to go.

Related

Go to anchor and scroll using JQuery or Javascript

I'm not really an JQuery and Javascript mogul. Hence, I'm facing an issue.
I'd like to move the page to a specific anchor as long as it has been loaded. The effect must seemless to the users.
I made it using this line of code:
location.hash = "story_section";
But, there is a problem: at the top of the page there is a fixed menu. Hence, the page did not lands in the proper position.
So, how could I roll the page some pixels from top?
I'm able to roll using JQuery, but only with animation:
$('html, body').animate({scrollTop: $("#"+secao).offset().top-altura}, 700);
Could you shed a light on this issue?
Cheers
You can use the jQuery scrollTop() method:
var currentScroll = $(window).scrollTop(),
menuHeight = $('menu-selector').height();
$(window).scrollTop(currentScroll - menuHeight);

One page scroll wrong offset with floating menu bar

I am having an issue. Im using a one page design for a friend with a fixed floating menu on the top. The problem I encounter is that when I click on a link it scrolls down but the offset is not right. Most the of time it scrolls down a little too much covering the content below the menu. What I am trying to achieve is that the scrolling stops at the div being exactly below my menu bar. The other issue is that somehow it wont scroll down when the space between two sections is too narrow. It tries but somehow only moves a few pixels then stops. I can imagine that both are related to the offset issue.
Im sorry, english is not my native language.
Here is what I got so far. A standard scrolling function with window.location.hash. The target are divs spread across the site.
$(document).ready(function () {
$('a[href^="#"]').on('click', function (e) {
e.preventDefault();
var target = this.hash;
var t = $(this.hash).offset().top;
$('.wrapper').animate({
scrollTop: t,
}, 1000, function () {
window.location.hash = target;
});
});
});
You can see an example of the problem live: http://rolfvohs.com/
What I tried so far was using the add.class function to bind the div with an extra padding when a link is clicked. It does work in a way but creates an awkward space. I also tried placing the divs at different locations but that does not fix the job either, just messes it up further.
I would appreciate some insight.
window.location.hash = target;
moves the scroll by default to the div position and you are setting offset top before the hash change so first its changes the offset after that it move to div location.
first try after removing the line "window.location.hash = target;" from the code
or
move the "window.location.hash = target;" out side and above the "$('.wrapper').animate({})" it will work .

scrollTo a specific div on long scrolling page when page loads

i have a long scrolling page with lots of divs, one below the other. i would like to scroll automatically when you visit (or reload) the site to scroll from top to a specific div near of the bottom. to jump there isnt a problem, but i want the "scroll" effect. ive checked out scrollTo() but i dont get it to work.
my first attempt was something like
$(document).ready(function () {
$.scrollTo('#div5'); });
but it doesnt fire anything. a little bit help needed :)
thanks
Try this:
$('html, body').animate({
scrollTop: $('#div5').offset().top
}, 500);
http://jsfiddle.net/nTwLm/2/

jQuery scrollTo or animate do not scroll page

I am trying to do something simple: when the user clicks on a div, the whole page scrolls to a certain location. I have done this before, but somehow this seems to not be working now. I mean, for now I just want any scrolling to happen to know that the plugin works.
It's quite simple really: $.scrollTo(500, 500) should be working, but nothing reacts, no error is thrown.
Here is a link to a dummy version of what I am doing: http://jansensan.net/dump/jquery-scrollto-issue/ Simply click on the black div at the bottom right to see... nothing happening. You may also look at the full code: http://jansensan.net/dump/jquery-scrollto-issue/js/global.js.
Is there anything in CSS that could break that functionality?
You can do like this:
$('html, body').animate({
scrollTop: $('#elementID').offset().top
}, 1000);
Replace #elementID with the id of the element you want to scroll to with animation.
Check out the actual implementation by click on Request Quote link at bottom.
It seems I was relying on wrong examples, $.scrollTo("#bottomContent", 1000, {easing:"easeInOutCubic"}); does work, sorry if for some of you this issue was obvious.
Your JavaScript says:
function scrollToTouts()
{
// FIXME: whatever I do here, nothing scrolls
$.scrollTo(500, 500);
}
Don't you need to supply the target of the scroll?
e.g.
$.scrollTo('#content', 500, 500);
or
$.scrollTo('body', 500, 500);

JavaScript to scroll long page to DIV

I have a link on a long HTML page. When I click it, I wish a div on another part of the page to be visible in the window by scrolling into view.
A bit like EnsureVisible in other languages.
I've checked out scrollTop and scrollTo but they seem like red herrings.
Can anyone help?
old question, but if anyone finds this through google (as I did) and who does not want to use anchors or jquery; there's a builtin javascriptfunction to 'jump' to an element;
document.getElementById('youridhere').scrollIntoView();
and what's even better; according to the great compatibility-tables on quirksmode, this is supported by all major browsers!
If you don't want to add an extra extension the following code should work with jQuery.
$('a[href=#target]').
click(function(){
var target = $('a[name=target]');
if (target.length)
{
var top = target.offset().top;
$('html,body').animate({scrollTop: top}, 1000);
return false;
}
});
How about the JQuery ScrollTo - see this sample code
You can use Element.scrollIntoView() method as was mentioned above. If you leave it with no parameters inside you will have an instant ugly scroll. To prevent that you can add this parameter - behavior:"smooth".
Example:
document.getElementById('scroll-here-plz').scrollIntoView({behavior: "smooth", block: "start", inline: "nearest"});
Just replace scroll-here-plz with your div or element on a website. And if you see your element at the bottom of your window or the position is not what you would have expected, play with parameter block: "". You can use block: "start", block: "end" or block: "center".
Remember: Always use parameters inside an object {}.
If you would still have problems, go to https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView
There is detailed documentation for this method.
Click here to scroll
<A name='myAnchorALongWayDownThePage"></a>
No fancy scrolling but it should take you there.
The difficulty with scrolling is that you may not only need to scroll the page to show a div, but you may need to scroll inside scrollable divs on any number of levels as well.
The scrollTop property is a available on any DOM element, including the document body. By setting it, you can control how far down something is scrolled. You can also use clientHeight and scrollHeight properties to see how much scrolling is needed (scrolling is possible when clientHeight (viewport) is less than scrollHeight (the height of the content).
You can also use the offsetTop property to figure out where in the container an element is located.
To build a truly general purpose "scroll into view" routine from scratch, you would need to start at the node you want to expose, make sure it's in the visible portion of it's parent, then repeat the same for the parent, etc, all the way until you reach the top.
One step of this would look something like this (untested code, not checking edge cases):
function scrollIntoView(node) {
var parent = node.parent;
var parentCHeight = parent.clientHeight;
var parentSHeight = parent.scrollHeight;
if (parentSHeight > parentCHeight) {
var nodeHeight = node.clientHeight;
var nodeOffset = node.offsetTop;
var scrollOffset = nodeOffset + (nodeHeight / 2) - (parentCHeight / 2);
parent.scrollTop = scrollOffset;
}
if (parent.parent) {
scrollIntoView(parent);
}
}
This worked for me
document.getElementById('divElem').scrollIntoView();
Answer posted here - same solution to your problem.
Edit: the JQuery answer is very nice if you want a smooth scroll - I hadn't seen that in action before.
Why not a named anchor?
The property you need is location.hash. For example:
location.hash = 'top'; //would jump to named anchor "top
I don't know how to do the nice scroll animation without the use of dojo or some toolkit like that, but if you just need it to jump to an anchor, location.hash should do it.
(tested on FF3 and Safari 3.1.2)
I can't add a comment to futtta's reply above, but for a smoother scroll use:
onClick="document.getElementById('more').scrollIntoView({block: 'start', behavior: 'smooth'});"
<button onClick="scrollIntoView()"></button>
<br>
<div id="scroll-to"></div>
function scrollIntoView() {
document.getElementById('scroll-to').scrollIntoView({
behavior: 'smooth'
});
}
The scrollIntoView method accepts scroll-Options to animate the scroll.
With smooth scroll
document.getElementById('scroll-to').scrollIntoView({
behavior: 'smooth'
});
No animation
document.getElementById('scroll-to').scrollIntoView();
There is a jQuery plugin for the general case of scrolling to a DOM element, but if performance is an issue (and when is it not?), I would suggest doing it manually. This involves two steps:
Finding the position of the element you are scrolling to.
Scrolling to that position.
quirksmode gives a good explanation of the mechanism behind the former. Here's my preferred solution:
function absoluteOffset(elem) {
return elem.offsetParent && elem.offsetTop + absoluteOffset(elem.offsetParent);
}
It uses casting from null to 0, which isn't proper etiquette in some circles, but I like it :) The second part uses window.scroll. So the rest of the solution is:
function scrollToElement(elem) {
window.scroll(0, absoluteOffset(elem));
}
Voila!
As stated already, Element.scrollIntoView() is a good answer. Since the question says "I have a link on a long HTML page..." I want to mention a relevant detail. If this is done through a functional link it may not produce the desired effect of scrolling to the target div. For example:
HTML:
<a id="link1" href="#">Scroll With Link</a>
JavaScript:
const link = document.getElementById("link1");
link.onclick = showBox12;
function showBox12()
{
const box = document.getElementById("box12");
box.scrollIntoView();
console.log("Showing Box:" + box);
}
Clicking on Scroll With Link will show the message on the console, but it would seem to have no effect because the # will bring the page back to the top. Interestingly, if using href="" one might actually see the page scroll to the div and jump back to the top.
One solution is to use the standard JavaScript to properly disable the link:
<a id="link1" href="javascript:void(0);">Scroll With Link</a>
Now it will go to box12 and stay there.
I use a lightweight javascript plugin that I found works across devices, browsers and operating systems: zenscroll
scrollTop (IIRC) is where in the document the top of the page is scrolled to. scrollTo scrolls the page so that the top of the page is where you specify.
What you need here is some Javascript manipulated styles. Say if you wanted the div off-screen and scroll in from the right you would set the left attribute of the div to the width of the page and then decrease it by a set amount every few seconds until it is where you want.
This should point you in the right direction.
Additional: I'm sorry, I thought you wanted a separate div to 'pop out' from somewhere (sort of like this site does sometimes), and not move the entire page to a section. Proper use of anchors would achieve that effect.
I personally found Josh's jQuery-based answer above to be the best I saw, and worked perfectly for my application... of course, I was already using jQuery... I certainly wouldn't have included the whole jQ library just for that one purpose.
Cheers!
EDIT: OK... so mere seconds after posting this, I saw another answer just below mine (not sure if still below me after an edit) that said to use:
document.getElementById('your_element_ID_here').scrollIntoView();
This works perfectly and in so much less code than the jQuery version! I had no idea that there was a built-in function in JS called .scrollIntoView(), but there it is! So, if you want the fancy animation, go jQuery. Quick n' dirty... use this one!
For smooth scroll this code is useful
$('a[href*=#scrollToDivId]').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) +']');
var head_height = $('.header').outerHeight(); // if page has any sticky header get the header height else use 0 here
if (target.length) {
$('html,body').animate({
scrollTop: target.offset().top - head_height
}, 1000);
return false;
}
}
});
Correct me if I'm wrong but I'm reading the question again and again and still think that Angus McCoteup was asking how to set an element to be position: fixed.
Angus McCoteup, check out http://www.cssplay.co.uk/layouts/fixed.html - if you want your DIV to behave like a menu there, have a look at a CSS there

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