So I am redesigning my website: http://staging.slackrmedia.com/keenanpayne/, but I am coming across a small issue. I want each "pane" of the website to be the exact height of the window, no matter what the size. I also want the content therein to be exactly positioned in the center.
I am trying to accomplish this with jQuery at the moment:
function setSectionHeight() {
// Set section heights
windowHeightPadding = $(window).height() / 2;
firstSectionPadding = ($(window).height() - $('header').height()) / 2;
// Apply proper styling
$('section').css({"padding-top":windowHeightPadding,"padding-bottom":windowHeightPadding});
$('section.home').css({"padding-top": firstSectionPadding,"padding-bottom":windowHeightPadding});
}
setSectionHeight();
// Adjust section heights on window resize
$(window).on('resize', function(){
setSectionHeight();
});
So what this is doing is calculating the window height and dividing it by 2, so I can set the top and bottom padding on each section.
However, for the first section, to get the proper top and bottom padding, I need to subtract the height of the header, which is why I have a firstSectionPadding variable.
Then I just add the CSS to each section tag on my website, with separate styling for the home section tag.
This works pretty well, but as you can see when you visit my site, for some reason the heights are not correct.
Right now it looks like:
And it should look like:
I have absolutely no idea where this extra padding or space is coming from on the top. I think my equations are right, but perhaps there isn't something I'm taking into consideration?
This could be done with CSS. One div set to 100% height and width, with text-align:center; A second div within set to display:table and 100% height and width. Finally, a third div set to display:table-cell and vertical-align:center;
Related
I would like an image to become fixed where it is once it appears on screen during a scroll, but become unfixed if the user scrolls back up.
However, when I use a JS on scroll function to change the image position to fixed, it suddenly "jumps"/resizes, and I'm not sure why. My fix was to create variables that alter the width and left values of the image after it becomes fixed, but I want to do this will multiple images on a page and each one seems to require a different width and left adjustment. I'm not sure what is conceptually causing this issue. Simply resetting the width and left to their original values does not work. Does a fixed position resize and image.
Here is a jsfiddle of the issue. And here is the code. JS:
var sitckyImageWidth = "38.4%";
var normalImageWidth = "48%";
document.addEventListener("scroll", function(){
var windowTop = $(window).scrollTop();
var windowWidth = window.innerWidth;
var windowHeight = window.innerHeight;
//loop through each div and grab top/bottom/midpoint info and find id
$('.articles').each(function(i){
var top = $(this).offset().top;
var bottom = top+ $(this).height();
var midPoint = (bottom+top)/2;
var thisId = this.id;
var newId;
//use container div info to find media info
var newId = thisId+"Media";
var sectionImage=document.getElementById(newId);
var sectionImageTop = $(sectionImage).offset().top;
//if article is on the page, change position to fixed and set top position
if (top<=windowTop&&bottom>windowTop){
$(sectionImage).css("top","10px")
$(sectionImage).css("position","fixed")
//$(sectionImage).css("width",sitckyImageWidth)
}
//if container is not at top of the page, return to relative
if (bottom<=windowTop||(bottom>windowTop&&top>windowTop)){
$(sectionImage).css("position","relative")
}
})
}); //end scroll
Position fixed means that an element will have relative sizes and positioning in relation to the viewport, not their parent elements.
Specifically what is happening here is that your div with ID article1Media is set to have a width of 48%. When it has the CSS property of position: relative then that resolves as 48% of the width of it's containing element (the div with id article1) however when it is position fixed that resolves as 48% of the width of the viewport. Since there is an implicit 8px margin on the <body> element then these are different.
There are a few different solutions to this, and how you tackle it depends on how you want to build your site.
Example fix 1
A simple fix for your immediate example is to simply add the following CSS.
body{
margin:0px;
}
.image{
margin:8px;
}
https://jsfiddle.net/Chipmo/k56qkk5b/13/
This moves the implicit margin onto the image element. Of course you can set it to whatever you like, or omit it entirely.
Look into CSS resets for more information about overriding implicit default styles, though be warned that it is possible to cause problems with overzealous reset codes.
( Edit: To be clear the above code is definitely not a drop in code for this problem everywhere. It will only work on quite simple HTML pages like your jsFiddle. )
Example fix 2
Another technique you could consider is locking the width and height to it's initial values using jQuery .width() and .height() functions. This would be inflexible, and you would have to do extra work to make it responsive (for mobile etc), but could be appropriate in some circumstances.
Example fix 3
A more portable solution might be to eschew relative sizing in favour of fixed widths and then use CSS media queries for reponsivity. Something like this:
.image{
width:500px;
}
#media(min-width:800px){
width:300px;
}
Example fix 4
If you wish to preserve the 'fluid' nature of using percentages I would suggest looking into using calc along with an offset that gets applied when the position is fixed (so, you add a class when you make the image fixed) that adjusts the sizing appropriately.
.media.image-fixed{
position:fixed;
width:calc(48% - 8px);
}
See this example https://jsfiddle.net/Chipmo/6mu2Lt9g/2/
Above behavior is observed since because of applying the position property not because of the scroll.Please take a look at the following link Position Properties
Position Fixed : Fixed position elements relative to document not on
any parent container.Hence occupies the complete width available.
Position Relative: Relative positioned elements behaves relative to hosted
containers.And inner elements consumes the hosted parent width.
I have some trouble making my design work. I looked around the web a lot, but I can't find what I'm looking for.
I'm trying to make something like that: concept design
The thing is that I started by doing that with CSS only, but it's not the good solution, because if my picture has a different ratio or another reason, it will not work at all.
What I'm trying to achieve is that inside a div, I have one big image and in the other div (floating left or right), I want two small images, one over the other, taking the same height as the big one. All this (the two divs) should take 100% width of the body, but I don't really know how to achieve that. I'm not sure to understand how to make height responsive with the width...
I also have some weird margin between my images... Can you help me delete them as well?
So my code is via this link: http://codepen.io/anon/pen/MygaEB
Someone (Giovanni Perillo) suggested me to have this Javascript code:
var div1 = document.getElementById("colonne-gauche");
var div2 = document.getElementById("colonne-droite");
var height1 = div1.offsetHeight;
var height2 = div2.offsetHeight;
if (height1 > height2) {
div2.style.height = height1;
}
else {
div1.style.height = height2;
}
The thing is that it's not working at all. I'm sure it's a code I could use, but I'm not sure how to make it work in my code.
EDIT : I tried to look what I was able to do with Flexbox, but it doesn't seem to work. Flexbox allow two box to be side by side, with the same height, but it need to be the same width as well. What I want is something more responsive like the big image is taking 3/4 width and the two images (in the same div) are taking 1/4 width, but they have the same height in total as the big image. I'm sure it's totally possible to do that like all masonry layout, but me it's not really a masonry, but something that stay the same : One big image and two little, but responsive depending of image size.
EDIT 2 : The code needed should allow to change the width of each divs to make sure that they have the same height (without changing image aspect ratio). It should work with different images aspect ratio as well. The example bellow show a div with three images, but that's just to say that div should change width dynamically to have the same height.
Javascript is not necessary. You can accomplish this with just CSS. To make side by side divs equal in height you need to make html and body have a height of 100% then you have to specify a height for your container div (this can be a percentage or a specified length). In this case I used a height of 500px for the .section class. Then for the inner containers you need to specify a height of 100%. Then each image within that container needs a specified height, for one image use 100%, for two use 50%, etc. I also removed your inline styles. I also removed the section tag.
Here is the updated codepen.
Update:
To preserve aspect ratio change the height of the img tags to auto. Also, change the height of the .section class to auto. I also change the width of .colonne-gauche back to 65% and the width of .colonne-droite back to 35%.
divs are block elements. you can set display:inline-block; to make them align side by side.
I have a nav bar that I have positioned 'fixed' at the top of my page. The problem that I have is that I want to displace the entire page down by the (dynamic) size of my nav depending on the size of the screen used. Basically, I want to move the whole page down the height of this nav. To do this, I'm going to be using a padding to the nav that will affect it's height. I am using a box-sizing:border-box attribute on this nav but whenever I try and load the page, it doesn't account for the extra height added with the padding when I use jQuery's .height() function.
The div with the 'displacement' class does not have anything to it except a 100% width initially. This is the ugly result along with all of the current code
http://jsbin.com/qomepe/2
Can anyone tell me why this is happening or if I've overlooked something?
Try using .outerHeight() to get the height of the navbar.
From jQuery API docs:
"The top and bottom padding and border are always included in the .outerHeight() calculation; if the includeMargin argument is set to true, the margin (top and bottom) is also included."
http://api.jquery.com/outerheight/
var height = $('header').outerHeight();
$('.displacement').css('height',height);
Try something like this
This is a followup to my question here. I would like to understand why applying position:absolute to the CSS of a div via jQuery fails, while applying it in a static style works. Here are two jsfiddle examples:
Works: http://jsfiddle.net/jasper/Ty6Af/2/
No worky: http://jsfiddle.net/Ty6Af/3/
Note that the only difference between the two is where I apply position:absolute. Vertical centering always works, but horizontal centering does not work when the page loads for the first time. If you manually re-size the window the div will center correctly.
All of my testing has been on Chrome under Ubuntu thus far.
Anyway, I'm just now delving into the world of web development and these are exactly the kinds of 'quirks' that I need to begin understanding.
EDIT:
#Jasper found something interesting. If you make two calls to .css(), first applying position and subsequently applying a margin, it works. I would love to understand why. Here is an example: http://jsfiddle.net/jasper/Ty6Af/5/
So the issue is with how the width of the div is calculated by the browser depending on its position.
If the div is set to position : static (by default) then it's width is 100% of it's parents width and the element is not allowed to move around the page.
If the div is set to position : relative then it's width is 100% of it's parents width but it can be moved around with left.
If the div is set to position : absolute then its width is determined by the actual content of the div, for instance if there is only a 200px wide <span> element within the div then the div will be 200px wide.
You can test these observations by changing the CSS of your jsfiddle to specify position : relative (etc...) and remove the JavaScript that makes the div position : absolute, then use your Developer Tools to inspect the element and it's calculated width.
The problem with your code is that it sets the position : absolute at the same time it sets the margin of the element by using its width/height (which are calculated differently depending on the position of the element).
If you want to set the position of the div in JavaScript then you can do something like this:
$(function() {
//notice I cached the selector so it can be used in the future as well as set the position of the div
$signuparea = $('#signuparea').css({position : 'absolute'});
$(window).resize(function() {
$signuparea.css({
'margin-top' : '-' + Math.round($signuparea.height() / 2) + 'px',
'margin-left' : '-' + Math.round($signuparea.width() / 2) + 'px',
});
}).trigger('resize');
});
Here's a jsfiddle: http://jsfiddle.net/jasper/Ty6Af/8/
I believe the problem is that when you apply your left and right in your second fiddle, you have yet to add position absolute to the div. Hence, the browser has no idea what do with the left and right values and ignores them initially.
Practically speaking in your second fiddle, you only actually add the position:absolute on the resize trigger. So before you resize your actual div has no positioning.
If you instead add the position absolute on load it works fine:http://jsfiddle.net/Ty6Af/9/
Notice that if you give it position:relative from the start (like this http://jsfiddle.net/Ty6Af/11/ ) it allready applies both the left and right value. The reason you can't actually see the effect of "left" is because it is a block element.
I hope that answers your question, I'm not quite clear on where you are stuck.
http://jsfiddle.net/Ty6Af/7/ this should work, the trigger function in jquery has bugs with chrome so you have to run the function on load too.
The problem seems to be that position:absolute; negates the current layout and requires you to position it.....
See: http://jsfiddle.net/ZHaRD/
Which Jasper explains much more eloquently than myself!
I am using JQuery Tools Scrollable to build a full-page-width scrollable form, such that each page of the form scrolls all the way across the page, replaced by the next page sliding in from the right.
The problem I'm having is how to center each page such that it stays centered amidst browser resizing and in-browser zooming (Ctrl +/-). My code is based upon: http://flowplayer.org/tools/demos/scrollable/site-navigation.html
I've tried encasing my code in a div like this:
<div style="margin-left:-440px; padding-left:50%; width:50%; min-width:880px;">
But, because this div is itself positioned in the middle of the page, the scrolling pages don't slide all the way to the left edge - they cut out at the div's edge about 30% away from left, which looks bad.
The only conclusion I can think of is to dynamically alter the margin-left I've defined on div class="items" to make sure it's always equal to 50% - 440px but no less than 0.
How can I do this using javascript?
is the container div absolute or relative positioned? If it has a specific width, let's say "800px", then centering it horizontally is easy with auto margins on left and right, e.g. margin: 0 auto. Otherwise it gets tricker.
If you want to respond to resize in Javascript, in jquery I do something like $(window).resize(function() {}) (docs here) and inside of the handler function update some value in CSS. If you just want to increase the width but still have auto-margins, you could select your div and update the width property, e.g. $('.mydiv').css('width', '900px');. This would fire any time the window is resized.