Scroll to div ID with offset - javascript

I am currently runnning a test site on Wordpress.
I have my page with several divs which have IDs and a menu on top with anchors which lead to those IDs.
My header is sticky, so when I click an anchor, it navigates to the div ID, but the beginning of the div stays hidden below the header. I would like it so that when I click an anchor, it navigates to the div, but few pixels above it.
I managed to do that, though with a little problem.
(function($,document){
$("a[href^='#']").click(function(){
var url = $(this).attr('href');
$('html,body').animate({scrollTop: $(url).offset().top - 90}, 2000);
});
})(jQuery);
What happens is:
I click an anchor with a href="#someid"
My browser navigates to the #someid with offset of - 90px (It works perfectly so far)
Then my browser scrolls 90px down, to the position where the div #someid starts at the beginning of the viewport (and behind the sticky header).
Finally my URL changes to http://example.com/#someid
I just want to delete step 3. Any help is much appreciated.
Update:
I just found out my theme has jQuery "One-page-nav" plugin installed and it is interfering. Still trying to understand how it works and if I can modify it to have offsets

I was having the same issue and in my case I solved it by adding padding-top and a negative margin-top of the same value:
.some-class {
padding-top: 4em;
margin-top: -4em;
}
By doing this my element looks like it's on the exact same location but the browser finds it sooner while scrolling. You can set these values to the height of your sticky header or play around to make sure the heading is exactly where you want it to be.
I hope I'm explaining this in a way that's understandable... It sure makes sense in my head :D

Related

Navbar visibility point auto-adjusts after top-down scrolling

Have put together a sticky navbar (jsfiddle) that comes into view only after the user scrolls down 10px from the top of the document. However as seen in the fiddle; using:
$(window).scroll(function () {
if ($(this).scrollTop() > 10) {
document.getElementById('navig').style.visibility = 'visible';
this only works in the first instance after the code is run. In subsequent similar actions (after scrolling down the document completely and scrolling back up again) in the same session, the navbar comes into appearance much further down than 10px. It only works again on refresh (rereun) and that too again, only the first instance of top to bottom scrolling.
Also, I'd want the effect to act on scrolling back up ie. the fixed navbar should become absolute at the base of the header when the user moves past that point. And it should hide when scrolling past 10px from top. There isn't a scrollBottom() function, so how is this handled?
This fiddle has jquery loaded: https://jsfiddle.net/6ss64s7e/
How can these issues be addressed? (pardon, am new to javascript).
Before you return to the value position:absolute; you have to delete all the other properties that you added because they won't be automatically deleted - so, you don't need top:0; anymore.
You can delete the top:0; property by passing empty string to its value, like this:
$('#navig').css({'position':'absolute','top':''});
For the detection of scroll and its direction, see this question.

One page navigation blocking my content

I tried to do a minimal version of the problem i am having. In short i am doing header with navigation that always sticks to the top of page when scrolling.
Now the problem is if you try and click on a section in the navigation, when you get scrolled to the section the navigation blocks half the content at the top by getting in the way.
This means the user has to scroll back up a little to see the content properly. I am using lorem ipsum as content replacement there.
How would i adjust where my browser position lands when the user clicks the navigation button so i can position the window correctly?
https://jsbin.com/hopiqe/edit?html,css
Eli-
Using HTML/CSS only, you'd have to do a hack like Kommodore suggests to get this working properly. Your really need JS to do this right.
You can do this with jQuery and a little foresight:
// Button 1 is what you click to start the interaction
$(".button1").click(function() {
// Using jQuery Animate and ScrollTop...
$('html, body').animate({
// We point user to div1
// We have an offset from the top of the window minus 50px
// `-50` should match the height of your header
scrollTop: $("#div1").offset().top-50
// 500 is milliseconds to do the `Animate` interaction
}, 500);
});
You could also use a combination of jQuery plugins called ScrollTo and LocalScroll.
I wired up a working CodePen that builds off the code you provided. The JS probably needs more tightening but you should get the idea.
The easiest way should be adding another div as a placeholder with height: 140px in front of each div (which then has to be called instead of the div) or using margin-top: 140px for each div.

Click function making page scroll in odd way (not to top of page)

First time asker, long time lurker.
I'm doing a fadein/out toggle that displays 1 of 2 charts depending on which button you click.
That bit works just fine, but I'm getting a weird page-jump glitch. Now, it's not the usual jump-to-the-top behaviour. I have that part covered in the code, and it doesn't do that.
Every time I click on one of the toggles, the page scrolls downward to the point where the chart area is at the bottom of the window.
But it gets weirder. If I make the browser window very short or very narrow (it's a responsive site), it stops doing this glitch. It's also not happening on iPhone or iPad at all, even though if I set the browser width to the same width as it would be on an iPad, the desktop browser still does the jumping.
There are no elements that are added/removed based on the viewport width in the area that's jumping around, and there are no anchor IDs that would be accidentally used as jump points.
Unfortunately I can't show the actual page to you, but I can show the script and a bit of the HTML.
The code for both toggles is the same, just with the IDs switched around.
The script:
$('#left-toggle > a').click(function(c)
{
c.preventDefault();
c.stopPropagation();
$('#right-toggle').removeClass('toggle-active');
$('#left-toggle').addClass('toggle-active');
$(pricing_subscriptionID).fadeOut('fast', function(){
$(pricing_singleID).fadeIn('fast', function(){
});
});
});
The HTML for the toggles:
<div id="chart-toggle">
<div id="left-toggle" class="toggle-active">Single Pricing</div>
<div id="right-toggle">Subscription Pricing</div>
</div>
"toggle-active" is just for styling.
Any ideas?
It seems to be almost wanting to centre the toggles on the page, but it's not quite putting them in the middle either.
JSFiddle: http://jsfiddle.net/TmrLw/
It's because of your link to #. Here are some ways you can fix this:
1. Replace "#" with something else
Instead of
Subscription Pricing
Try this:
Subscription Pricing
This will give you the cursor pointer you're looking for and avoid the page jump.
2. Create a class with the pointer effect
If you use this CSS rule:
.pointer {
cursor: pointer;
}
Then you can wrap your text with this class instead:
<div class="pointer">Subscription Pricing</div>
3. Remove the default effect of "#"
This Javascript will get rid of its default effect:
$('a[href="#"]').click(function(e)
{
// Cancel the default action
e.preventDefault();
});
Hope this helps
Probably its because the link's href is # which links to the top of the document.
try to remove the href attribute

html5: link to the #id of a div at a certain point on the page

I have a responsive header that I'm working on for a site that turns into a fixed-position navbar as you scroll down. It takes up roughly the upper quarter of the page.
The content of the page is in a series of divs / cards that slide up as you scroll down.
I want to add <a href> links to the navbar that correspond to the ids of the divs. However, when I do so, the div content moves to the top of the page.
So I get something like the following when I navegate to /localhost#first_card
---- TOP OF PAGE
[<div id="first_card"> begins here]
---- bottom border of navbar
[<div id="first_card"> continues here]
when what I really want is this:
---- TOP OF PAGE
---- bottom border of navbar
[<div id="first_card"> begins here]
Is there a way to control where on the page the hash link might render the <div id="first_card"> after navigating to /localhost#first_card?
I've been trying to solve this for you in JSFiddle for a bit now, and from what I can find, the best way would be to box all the cards into a seperate element with overflow:auto
The result of this, and as proof of it working can be found at http://jsfiddle.net/Entoarox/TT2JN/
This may not work for your site, but the only alternative is using javascript to solve this and I cant recommend that because it would cause a massive load on the visitors PC due to most hash related javascript functionality being either static or very new, meaning that to support older browsers, you'd need to manually poll if the hash has changed, either taking up a lot of CPU time, or having a very slow response to when the hash has changed.
Try the jQuery scrollTop() command. This will give you the precise positioning that you need.
http://api.jquery.com/scrollTop/
You might have to change your links up a little. Example with jQuery and a wrapper div:
<a id="first-card-jump" href="#first_card">Jump to First Card</a>
<div id="wrapper">
NAVBAR
first div
second div
...
nth div
</div>
<script>
$('a#first-card-jump).on('click', function(event) {
event.preventDefault(); // Not sure if this is needed
$('div#wrapper).scrollTop(500); // you have to measure how far down you want to scroll
});
</script>
Note that this might mess up your in-page back button support. Not sure if that's an issue for you.
p.s. If you're in time trouble, the simplest fix is to add a top margin to each div equal to the height of the fixed navbar.
Hope this helps!
I made you a jsfiddle
it uses padding-top to create the offset to the top, then it uses margin-bottom to remove the offset between the elements.
the relevant css:
/*
add top padding and substract the same amount from bottom margin
*/
.card {
padding-top: 200px;
margin-bottom: -200px;
position: relative;
}
/*
we need to reverse the stacking for this solution, so the elements later in
the document don't cover the elements before
either you know how many cards you have, so you can solve this in a central
css file (like below)
or you must add the stacking upon creation (in your template)
or use the javascript
starts from 2 because nav is :nth-child(1) in this example
*/
.card:nth-child(2){
z-index: 0;
}
.card:nth-child(3){
z-index: -1;
}
.card:nth-child(4){
z-index: -2;
}
javascript to reverse the stacking, using jQuery
$(function(){ //on load
$('body>.card').each(function(i, elem){$(elem).css('z-index', -i)})
})
If I understand your question correctly, you want to make a div appear in the middle of the page, right? So, to do this, you can just direct the page to the div above it. You can also make another div above it with a fixed height.

keep div on top of the page while scrolling

==================
Name: //html text box//
age: //text box//
//div//
//table//
==================
Assume the above as a HTML page. Also assume the table has atleast 50 rows so that, the entire page could be scrolled. currently, when I scroll the page, the entire page (div, table) scrolls. I want the div to be at top of the page while scrolling such as the figure below:
==================
//div//
...
...
...
//row21//
//row22//
...
...
==================
I would like to know if this is possible at all. I tried using CSS for div:
//CSS for div:
position: fixed;
width: 100;
But, it displays the position of the div exactly where it was earlier. But, I would like to move the div to the top of the page while scrolling.
Thanks.
This is NOT trivial
You will need to use JavaScript to copy div and make its position fixed.
You will need to handle scroll event to hide and show fixed div
I have a small library to do such thing for table headers , I think you can read the source code or use as-it-is for a table
demo : http://www.agyey.com/demo/stickyhead/demo.html
code: https://bitbucket.org/anuraguniyal/stickyhead
This is not possible in the CSS alone. As you already know you can use:
position: fixed
to keep the element in the same place with respect to the browser window, but in order to move it to the top when the content is scrolled you need to use JavaScript.
You may want to look at this SO post to get an idea how to achieve that effect.
You need to add this to the css.
top:100px;//adjust til the div is below the name and age section.
position:fixed;
I think that's what you are looking for.

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