Setting CSS class to a specific div with specific style attribute - javascript

I'm currently redoing a website (http://www.vins-de-fronton.com/) and I have some issues doing what I would like to do.
The guys who made it set the content area in some kind of a container and used 'my custom scrollbar' from malihu (http://manos.malihu.gr/jquery-custom-content-scroller/), I would like to keep them but I think it may cause some issues for what I'm trying to do, let me explain :
I want to add a scrolling parallax effect to my differents div and I was trying to do this with js, but all of the things I've tried need to use the normal scrollbar and its scrolled px, which is replaced by the custom scrollbar.
When you scroll up or down, the actual scrollbar set a specific style to the "#mCSB_1_container" div with 'top' changing depending of where you are in the page.
So I was thinking that maybe I could add a specific css class when the div #mCSB_1_container has top:-480px as style attribute (for exemple)? Using javascript maybe ?
Here is the div:
<div id="mCSB_1_container" class="mCSB_container" style="position: relative; top: -488px; left: 0px;" dir="ltr">
Thanks a lot for reading this, and I hope that I've well explained my issue :)
Cheers

Try this: you can read top value for the div and add CSS class as shown below
$(function(){
var top = $("#mCSB_1_container").css('top');
if(top=='-480px') {
$("#mCSB_1_container").addClass("YourClass");
}
});

Related

Set Footer To Bottom Of Page Using JavaScript only

I'm trying to hack a Squarespace template to turn an announcement bar into a footer.
Can anyone advise how to force an element to the bottom of the page using JavaScript only.
No CSS, no jQuery.
Thanks
James
Without CSS you can not place anything in a specific location on the page. You can move things to the end of the HTML (The last tags of the <body> element) But they will still just show inline with the rest of the page.
CSS is required if you want to change the visible location of an element or set of elements.
I am not sure what you mean by no CSS. I understood you want to apply CSS changes with DOM manipulation.
You can apply a position: fixed and float it to bottom.
var container = document.querySelector('.announcement');
container.style.position = 'fixed';
container.style.bottom = 0;
Working fiddle

Weird flicker in jQuery toggle

I have a weird problem and i cant find a solution no matter what i tried.
I have a simple menu that toggles few divs (slide up/down), like this:
<div class="navigation">
<ul class="left">
<li>lorem1</li>
<li>lorem2</li>
<li>lorem3</li>
</ul>
</div>
and a few divs that are being toggled.Pretty simple but there is a lot of code, so i wont paste it here.
Script that makes it work is:
$('.navigation a').click(function() {
var $requested = $(this.getAttribute('href'));
$('.top-drawer').not($requested).slideUp('slow');
$requested.slideToggle('slow')
});
Once the user clicks on the link, the div slides down more than it should, flickers and then it becomes the real height (the height is should be).
Here is a Fiddle. Please be sure to have the "Result" Window at at least 1000+ px wide otherwise it wont work (the error wont be shown).
See my suggestion on this JSFIDDLE
Here an explanation of the changes in there:
The Problem
With all those floating elements inside each .top-drawer jQuery has a lot of issues calculating the height of the div because the elements will move around while sliding up and down.
Suggestion
Switching to inline-block instead. But for that to work with your CSS, particularly with the padding on each .top-drawer, you need to use box-sizing: border-box; on anything that is using padding, inline-block and width with %. If curious you can read about this HERE.
New problem
If you go the route of inline-block (best practice now). You will need to use jQuery 1.8.xx or higher. I noticed in your fiddle you use 1.7.2, which has a bug with border-box that was fixed in versions after that.
Try to understand the code you are using.
This is the way I think jQuery's slideUp(), and slideDown() works; mainly the algorithm changes the height of the element, and display after the height is equal to the height of the element or at "0".
So when you will have your element's position set to relative you will see what you're calling "flickers", specially when you have multiple element at the same position. You will also see these "flickers" when you use fadeIn(), fadeOut() etc, because the display of the element is not instantly set to "none" or anything visible in these cases, but after the animation completes.
Solution:
Set the element's position to absolute. That should solve your issue;
example.

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.

jQuery slide is jumpy

I tried to slide in and out a DIV with the toggle function of jQuery but the result is always jumpy at the start and/or end of the animation. Here's the js code that I use:
$(document).ready(function(){
$('#link1').click(
function() {
$('#note_1').parent().slideToggle(5000);
}
);
And the HTML:
<div class="notice">
<p>Here's some text. And more text. <span id="link1">Test1</span></p>
<div class="wrapper">
<div id="note_1">
<p>Some content</p>
<p>More blalba</p>
</div>
</div>
</div>
You can also see the complete example here: jQuery Slide test
I usually use Mootools and I can do this slide without any problems with it. But I'm starting a new project in Django and most app in Django use jQuery. So for that and after reading this jQuery vs Mootools I decided that will be a good occasion to start using jQuery. So my first need was to slide this DIV. And it didn't work properly.
I did more search and I found that's an old bug in jQuery with margin and padding applied to the DIV. The solution is to wrap the DIV in another DIV. It didn't fix the thing in my case.
Searching further I found this post Slidedown animation jumprevisited. It fix a jump at one end but not at the other (Test2 in jQuery Slide test).
On Stack Overflow I found this jQuery IE jerky slide animation. In the comments I saw that the problem is with the P tag inside the DIV. If I replace the P tags with DIV tags that fix the problem but that's not a proper solution.
Lastly I found this Weird jQuery behavior slide. Reading it I understood that the problem resolved by switching from P tag to DIV was with the margins of the P (not present in the DIV) and the collapsing of margins between elements. So if I switch the margins to paddings it fix the problem. But I loose the collapsing behavior of margins, collapsing that I want.
Honestly I can say that my first experience with jQuery is not really good. If I want to use one of the simplest effect in jQuery I have to not use the proper function (slideToggle) but instead use some hand made code AND wrap the DIV in another DIV AND switch margins to paddings, messing my layout.
Did I miss a simpler solution ?
As krdluzni suggest, I tried to write as custom script with the animate method. Here's my code:
var $div = $('#note_2').parent();
var height = $div.height();
$('#link2').click(
function () {
if ( $div.height() > 0 ) {
$div.animate({ height: 0 }, { duration: 5000 }).css('overflow', 'hidden');
} else {
$div.animate({ height : height }, { duration: 5000 });
}
return false;
});
But that doesn't work either because jQuery always set the overflow to visible at the end of the animation. So the DIV is reapearing at the end of the animation but overlaid on the rest of the content.
I tried also with UI.Slide (and Scale and Size). It works but the content below the DIV doesn't move with the animation. It only jump at the end/start of the animation to fill the gap. I don't want that.
UPDATE:
One part of the solution is to set the height of the container DIV dynamically before anything. This solve one jumping. But not the one cause by collapsing margin. Here's the code:
var parent_div = $("#note_1").parent();
parent_div.css("height", parent_div.height()+"px");
parent_div.hide();
SECOND UPDATE:
You can see the bug on the jQuery own site at this page (Example B):
Tutorials:Live Examples of jQuery
THIRD UPDATE:
Tried with jQuery 1.4, no more chance :-(
I found what works consistently is setting an invisible 1px border:
border: 1px solid transparent;
No need to fix the width or height or anything else and the animation doesn't jump. Hooray!
The solution is that sliding div must have the width set in pixels. Do not use 'auto' nor '%'. And you will have great result! The problem is in inline elements thats are in a sliding div.
but if they have width in px the height will be identical. Try it.
I've ran into this problem today. I did notice however that disabling all CSS fixed the problem. Also I knew it worked fine before so it must have been recent changes that caused the issue.
It turned out I used transitions in CSS to ease in and out of hovers.
Once these transitions were removed from the elements I was adding everything was fine.
So if you have the same issue, just add these lines to the elements you're adding:
-webkit-transition: none;
-moz-transition: none;
-o-transition: none;
-ms-transition: none;
transition: none;
(I might have abused transitions a bit by not just adding them to the elements I want to have transitions for, but using them for the entire website.)
Try removing all CSS margins from all the elements. Usually jerky animation comes from margins not being taken into account by the animation framework.
Jerking happens when the parent div ".wrapper" in your case has padding.
Padding goes on the child div, not the parent. jQuery is animating height not padding.
Example:
<div class="notice">
<p>Here's some text. And more text. <span id="link1">Test1</span></p>
<div class="wrapper" style="padding: 0">
<div id="note_1" style="padding: 20px">
<p>Some content</p>
<p>More blalba</p>
</div>
</div>
</div>
Hope this helps.
I find animate() is the most reliable way to animate anything in jQuery (cross browser at least).
This dynamically wraps the content in a div, then animates the height of that div wrapper by using the height of its inner content.
http://jsfiddle.net/BmWjy/13/
$('a').click(function(event) {
event.preventDefault();
xToggleHeight($(this).next());
});
//For each collapsible element.
$('.collapsible').each(function() {
//Wrap a div around and set to hidden.
$(this).wrap('<div style="height:0;overflow:hidden;visibility:hidden;"/>');
});
function xToggleHeight(el){
//Get the height of the content including any margins.
var contentHeight = el.children('.collapsible').outerHeight(true);
//If the element is currently expanded.
if(el.hasClass("expanded")){
//Collapse
el.removeClass("expanded")
.stop().animate({height:0},5000,
function(){
//on collapse complete
//Set to hidden so content is invisible.
$(this).css({'overflow':'hidden', 'visibility':'hidden'});
}
);
}else{
//Expand
el.addClass("expanded").css({'overflow':'', 'visibility':'visible'})
.stop().animate({height: contentHeight},5000,
function(){
//on expanded complete
//Set height to auto incase browser/content is resized afterwards.
$(this).css('height','');
}
);
}
}
You could write a custom animation using the animate method. This will give you absolute control over all details.
I noticed if you have a <br /> after your container <div> the animation will also be jumpy. Removing this resolved my problem.
css padding and jquery slideToggle doesn't work well together. Try to box out padding.
There are obviously a lot of different solutions to this issue - and depending on your layout, different solutions have different results.
Here was what I had (stripped down)
<div>
<p>Text</p>
</div>
<div class="hidden">
<p></p>
</div>
When I would use jQuery to show <div class="hidden">, the margin on the <p> element would collapse with the margin of the <p> element above it.
I thought it was strange since they were in different <divs>.
My solution was to eliminate the margin on the bottom of the <p>. Having a margin on one side prevents the margin from the bottom of the first <p> from collapsing with the top of the second <p>.
This workaround solved my problem, can probably be applied to others, but may not work for all.
You just have to modify the up, down effects in effects.js to have them take into account margins or paddings that may exist and then adjust what they perceive to be the total size of the element to accommodate those values...something along these lines....
Effect.BlindDown = function(element) {
element = $(element);
var elementDimensions = element.getDimensions();
//below*
var paddingtop = parseInt(element.getStyle('padding-top'));
var paddingbottom = parseInt(element.getStyle('padding-bottom'));
var totalPadding = paddingtop + paddingbottom;
if(totalPadding > 0)
{
elementDimensions.height = (elementDimensions.height - totalPadding);
}
//above*
return new Effect.Scale(element, 100, Object.extend({
scaleContent: false,
scaleX: false,
scaleFrom: 0,
scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
restoreAfterFinish: true,
afterSetup: function(effect) {
effect.element.makeClipping().setStyle({height: '0px'}).show();
},
afterFinishInternal: function(effect) {
effect.element.undoClipping();
}
}, arguments[1] || { }));
};
Try setting the 'position' property of the the container (in this case the .notice div) to 'relative'.
Worked for me.
Source: slideToggle height is "jumping"
There are a lot of suggestions here and a lot of back and forth as to what works. For me, the behavior problem was when the animation of expanding the container would over expand and then bounce back to the correct expansion height (all done as part of the one animation). In way of example, the animation would expand to a height of 500px initially and then retract to 450px. There was no problem with collapse.
The solution that worked was to add to the expanding/collapsing div, a CSS of:
white-space: nowrap;
That worked perfectly - smooth expansion to the correct height.
I had the same issue, but not a single one of the proposed solutions worked for me, so I propose a solution that eliminates relying on slideToggle() altogether.
Spark Notes: Load the page as normal, collect the height of each element you want to toggle, store that height in a special data attribute, and then collapse each element. Then it's as easy as changing the max-height between the value in the element's data-height attribute(expanded) and zero(collapsed). If you want to add extra padding and margins, etc to the elements, I recommend storing those in a separate CSS class to add and remove with the max-height property.
Place the jQuery right after the elements you want to toggle and allow them to execute during page load (so you don't have to watch them all load and then collapse).
HTML
<ul id="foo">
<li>
<h2>Click Me 1</h2>
<div class="bar">Content To Toggle Here 1</div>
</li>
<li>
<h2>Click Me 2</h2>
<div class="bar">Content To Toggle Here 2</div>
</li>
</ul>
CSS
#foo>li>div.bar {transition: all 0.5s;
overflow: hidden;}
jQuery
$('#foo h2').each(function(){
var bar = $(this).siblings('.bar');
bar.attr('data-height', bar.height()); //figure out the height first
bar.css('max-height', '0px'); //then close vertically
});
$('#foo h2').click(function(){
var bar = $(this).siblings('.bar');
if ( bar .css('max-height') == '0px' ){ //if closed (then open)
bar.css('max-height', bar.data('height') + 'px');
} else { //must be open (so close)
bar.css('max-height', '0px');
}
});
Here is a working JSFiddle: http://jsfiddle.net/baacke/9WtvU/
The problem is that you are performing the action on the parent, doing this removes the CSS related to that element.
You need to run the slide on your note1, not the parent of note 1.
I had the same issue and fixed it by moving down a level.
For me removing the min-height from my container solved the problem.
You might try adding a doctype if you don't have one, it worked for me on IE8 after I found the suggestion here on SO: jQuery slideToggle jumps around. He suggests a strict DTD but I just used the doctype that google.com uses: <!doctype html> and it fixed my problem.
i came across the same bug took days to find a solution. the problem is when the element is hidden jquery is getting the wrong height. top fix it you must get the hight before hiding and use a custom animation to that height. its tricky go here for a better explanation
I had the same problem with 'jerkyness' with divs inside my nav tag - my aim is to show an unordered list on hover of the div (if one exists). My lists are dynamically created so they do not have a fixed value.
Heres the fix:
$("nav div").hover(
function() { // i.e. onmouseover function
/****simple lines to fix a % based height to a px based height****/
var h = jQuery(this).find("ul").height(); //find the height
jQuery(this).find("ul").css("height", h);
//set the css height value to this fixed value
/*****************************************************************/
jQuery(this).find("ul").slideDown("500");
},
function(){ // i.e. onmouseout function
jQuery(this).find("ul").slideUp("500");
});
});
Ran into this issue today, saw this question, and started tinkering based on what I saw here. I solved our jumpy issue by removing the position:relative from the CSS of the containing div. No more weirdness after that. My 2 cents.
Make sure you don't have CSS transition rules set globally or on your container or any included elements. It will also cause jerkiness.
In my case I solved it adding style="white-space:nowrap;" to the element to prevent miscalculations on the jQuery function; no need to set a fixed width unless you need to wrap.
I was using slideDown() like this
$('#content').hide().delay(500).slideDown(500);
For me, it was the main container #content element. I was having it hidden and then calling slideDown(). I removed the padding property in the CSS and everything worked fine after that. It's usually a margin, padding, or % width, so the easiest method is commenting out each property and testing them 1 by 1 to get your results.
I just learned that this problem can also occur if there are floated elements in the expanding/collapsing element. In that case, a clearfix (clear: both;) at the end (still within) the animated element can get rid of it.
I had the same issue. I fixed it by adding this:
.delay(100)
Guess giving it more time to think helps it along?
Adding my solution: turned out my issue was flexbox (only in chrome). I had align-items: baseline; set on the parent element. Set align-self: center; to my slideToggling full-width child element and it cleared it right up. Great use of two hours.
For me the solution was, that i had a CSS style definition like following:
* {
transition: all .3s;
}
Removing this was the solution!

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