CSS body 100% height and overflow when necessary - javascript

I know how to ensure that the HTML body vertically stretches/shrinks to 100% height of the browser viewport (by having 100% height in the body and html rules).
I also know that normal HTML flow will result in containers vertically stretching to contain their contents (if things are set up properly).
Yet, I cannot seem to achieve both.
I.e. I cannot beat CSS into ensuring that when my page is viewed on a high resolution screen that it vertically stretches to leave no gaps AND to ensure that if my page is viewed on a lower resolution screen that the body stretches past the viewport (to accommodate all the content) and introduces scrollbars.
To me that is ideal behaviour and yet I sadly believe that this cannot be achieved purely in CSS. I know I can do this in JavaScript quite easily, but I want to be able to do it just in CSS.
Is it possible, or am I forced to use JavaScript?
Edit:
I have researched, tried and test so many techniques, but it just seems like it can't be done. Looks like I am going to have to go back to JavaScript.

OK so this definitely works for me:
html {
height: 100%;
}
body {
min-height: 100%;
display: flex;
}
#wrapper {
width: 100%; /* Necessary because of side-effect of flex */
height: 100%;
}
Exactly what I tried before, but I thought I would give this new CSS feature "flex" a go and it has done the trick. So it looks the CSS managers/creators have finally addressed these critical issues with dynamic height and vertical centring.
I hope this helps someone else stuck on this issue.

You can use the min-height css property.
html, body {
min-height: 100%;
}

min-height: 100%; /* other browsers */
height: auto !important; /* other browsers */
height: 100%; /* IE6: treated as min-height*/

Taking inspiration from a question which seems to be pretty much the same as mine: Make body have 100% of the browser height
This is working for me:
html {
height: 100%;
}
body {
min-height: 100%;
}

Related

How to set 100 % height without having a vertical scrollbar?

Context
I have a navbar with a fixed height. I want the space underneath to fill the rest of the screen vertically. I also need to have a fixed height because I have a container inside the page that has a list that is scrollable but without scrolling the whole page overflow: hidden
The Problem
When I set a height on all parent elements of 100% I get a vertical scrollbar. I found some answers on SO about "margin collapse" but nothing that could solve my problem.
100vh also won't work without having a scrollbar.
Here is the css for setup the height (#__next is just a div where next.js renders the page):
html,
body,
#__next {
height: 100%;
width: 100%;
}
The navbar is just a fixed pixel height, and the space below has height: 100%
Here is a screenshot that shows the vertical scrollbar:
I can't find any problems on the chrome inspector.
This is how it should look (design file):
Do you know how to solve this? I need to have both containers from screen "SippetPanel" and "SnippetContent" to take the remaining height without adding a scrollbar. It should also work to have a inner scrollbar with overflow hidden (later on when there are many items in the list like from design file)
Be aware that percentual heights refer to the height of the parent.
You can use calc() to solve your issue:
#__next{
height: calc(100% - navbarpx);
...
}
calc()
For the padding issue you can look into border-box.
I usually just try different vh values, that means 90vh, 95.5vh etc. so it all sits perfectly. You can try to meddle with body position: absolute etc., but that would push everything into the navbar, so then you would need to fix it with additional margin-top.
So the best solution I see is to try different vh values for the height and find the sweet spot. You will need to do the same for different phone types as well with media queries, but it shoudn't really be hard.
One of the ways is to use flex-box, it allows you to explicitly say(take all available height.
.body {
display: flex;
flex-direction: column;
}
.navbar {
flex: 30px 0 0;
/* 30px height and do not grow or shint */
background: red;
}
.content {
flex-grow: 1;
/* take all available space */
background: blue;
}
.body, html, body {
width: 100%;
height: 100%;
}
<div class="body">
<div class="navbar"></div>
<div class="content"></div>
</div>

Unable to resize the textarea height

I've noticed a strange bug while using a textarea in a my project.
At first I thought there was a problem in my code but then I was able to replicate that bug extracting the essenial in a JsFiddle .
The problem is:
If I change the height of the textarea by code without any interactions from the user before, the height get stuck at that size.
For example, if you click to the button "Change size" (in the jsfiddle above) and then try to resize back to the initial size using the element grip (at the bottom-right corner), you can't. It's like if that new height is the new ''minimum allowed size'' of the textarea.
What am I doing wrong? what am I missing?
Thank you in advance.
Height overrides min-height in Chrome.
In older versions of chrome there was no restriction.
So if you use height min-height will be your height. So you need to
set min-height and max-height only. Height overrides min-height in
Chrome.
textarea{
max-height: auto;
min-height: 50px;
resize: both;
}
Okay this solution works for me (chrome Version 47.0.2526.111 m):
https://jsfiddle.net/ezsz8xr5/9/
I found this interestining link: https://code.google.com/p/chromium/issues/detail?id=94583
Seems that it is a known issue.
I know this question has been asked a while ago, but there's no good answer to it, and I found a solution.
What I found is that putting a % height for the textarea will not change it according to its parent.
If you put the rule resize: vertical, changing manually the height you'll notice that your browser will put the style.height in pixels.
So I tried putting height: 150px and it worked.
So here are two solutions :
First, put your textarea's height in pixels, not in percentage.
parent {
width: 150px;
}
parent textarea {
height: 100%; /* not working ! */
}
/* Instead, do : */
/* css variable */
:host {
--height: 150px;
}
parent {
height: var(--height);
}
parent textarea {
height: var(--height);
}
For a SCSS way :
parent {
$height: 150px;
height: $height;
textarea {
height: $height;
}
}
Second, declare the textarea parent's display as flex, and without any additional rule, it will automatically resize your textarea. If it does not, then do this :
parent {
display: flex;
/* if flex doesn't work by itself, add this + textarea rule : */
flex-flow: column nowrap;
}
parent textarea {
flex: 1; /* tells the textarea to fit all the free space it finds */
}
It seems like a browser issue yes, still not fixed in 2022, sadly. If it is intentional, then it's even not documented.
Hope this will help someone in the future.

How to get background image cover with 100% height?

I'm using an image with a height of 5000px, and i want make it always appear 100% in width and height to cover the background, in mobile and desktop.
.main {
position: relative;
background: url('../images/background.png') no-repeat top center;
background-size: cover;
width: 100%;
}
This code does not work, it makes her not to appear. I always need to set a height, and the problem is that the mobile's height is different from the desktop.
So you could say.. 'you can set height: 100%'.. and I did .. but nothing happens, the image doesn't appear, only if i set with pxs.
UPDATE
I feel urged to update my answer since I apparently understood the question the wrong way. I'll leave the old version at the bottom since apparently a lot of people found it helpful even though it failed to answer the original question.
Since your background image is repeating itself, I'll assume you don't want the whole image, just whatever height you need. So, you need 2 things:
set a height on .main
get rid of background-size altogether
So, this should actually work for you:
.main {
position: relative;
background: url('../images/background.png') no-repeat top center;
width: 100%;
height: 100%;
}
If my assumption is correct, there's 1 more thing: you don't need a background over 5000px high to achieve your goal, just reduce it to 1px height (i.e. 1 line of your desired background) and change your css to:
.main {
position: relative;
background: url('../images/background.png') repeat-y top center;
background-size: cover;
width: 100%;
}
I hope this helps
OLD VERSION
Your .main has no height and height:100%; doesn't work because the elements containing it have no height themselves.
One possible solution would be to add this:
html, body, .main {
height:100%;
}
This might be exactly what you need, but you may also run into other problems with this solution. It all depends on what you're actually trying to achieve.
Other possible solutions:
Use viewport units
.main {
height:100vh;
}
Please be aware that some mobile devices interpret these differently from what you'd expect.
Add the background to the body itself
body {
background: url('../images/background.png') no-repeat top center;
background-size: cover;
}
As I wrote before: It's difficult to tell which solution is the best, it depends on your goal.
Have you tried adding this style?
html, body{ height: 100%;}
Then adding a height:100%; to your .main div
You are working with background-image... Keep in mind that the size of the rendered image has nothing to do with the image it self, but with the element created to contain it.
Now, if you want your image to appear at 100% height and width you can use the property background-size: contain, instead of cover.
This will tell the browser that your image should not be cropped (as long as you have a height set for the .main element).
It seems to me, that the kind of effect you want is easier done if you just use the <img> tag instead of css background.
I had a issue about flex box can`t fit the background height, and the code below suited for me. The rest background-size,repeat and position depends on yours.
html{
height:auto;
}
body{
display: flex;
flex-direction: column;
min-height: 100vh;
}

DIV height 100% for remaining space under another div

So I have a header bar for a page I made with a height of 150px. Under that area I want another DIV to fill the remaining space (width and height) all across the screen and to the bottom of the screen. I've tried setting height: 100% for the DIV, but that causes the screen to become scrollable and I only want it to fill the remainder of the page. NOTE: There is NO footer or anything under it.
Using jQuery/Javascript is acceptable, but CSS-only is prefered (if possible). If using jQuery, please explain the proper way to have it implemented into the page (I'm assuming $(function() {...}); under the <style> tag in the head.
I've tried searching for a result before, but nothing seems to work correctly.
tl;dr I basically made 3 options for you. click on the 'like this' in the below paragraph to see what they all look like without any text. Click on the A). B). and C). links in the paragraphs below that to see the difference between the three options. Check how each one scrolls differently, they are all different I promise. After you look at all three you can read how the one you want is implemented. (that is if you like any of them.) Hope you like it, no problem if you don't :)
I'll have a go at this, because it honestly depends on what you're going after there are multiple ways to look at it and it depends on your end goal. I will cover three possible scenarios: (which all look the same without text mind you, like this, but if you want to see what they look like with text click the letters. Make sure you scroll the page to see the difference between them.)
(Just as a side note I based A). and B). off how Twitter Bootstrap does it.)
A). You just want it to look like one div on top of the other (header div on top of main-content div) and display like that, but you still want the page to scroll if the 2nd div's text overflows. In this implementation when they scroll will move the header out of view, but if you don't want the header div to move out of view that leads me to
B). Same as the first header div on top of main-content div, but when they scroll the header div will still stay in place at the top instead of moving out of view.
and last of all,
C). You really do want the div to stretch to the bottom of the screen and never have the scroll bar for the whole page. This could be used in some cases, for instance, Spotify makes a nice music app with this kind of style so that you never scroll the whole page just panes in the page.
Ok so first here is the html code used to construct all three of them
<body>
<div class="header"></div>
<div class="main-content"></div>
</body>
And now to the fun part...
I will provide a Fiddle for the following examples, and with the css I will put the necessary code at the top and the unneccessary code at the bottom. (The html may have some unneccasary text so just ignore that. I just want you to see the page scrolls differently on the three.)
A).
no need to rephrase what it is so I'll just show you the code that is necessary.
First, here is A). without the text just so you can see what it looks like the others until the content gets too large.
Here is the fiddle with the text so you can see how it differs.
Here is the necessary css for A). (the background-color isn't completely necessary, but it is somewhat necessary to show the point.)
body {
padding-top: 150px;
background-color: #ddd;
}
.header {
position: absolute;
top: 0;
left: 0;
right: 0;
height: 150px;
background-color: #676767;
}
and now for...
B).
First, here is B). without the text just so you can see what it looks like the others until the content gets too large.
Here is the fiddle with the text so you can see how it differs.
Here is the necessary css for B).
body {
padding-top: 150px;
background-color: #ddd;
}
.header {
position: fixed;
top: 0;
left: 0;
right: 0;
height: 150px;
background-color: #676767;
}
As you can probably tell the only difference is the position: fixed on the .header, but look at the two examples to see the difference it makes.
and now last of all C).,
C).
First, here is C). without the text just so you can see what it looks like the others until the content gets too large.
Here is the fiddle with the text so you can see how it differs, and with I'll call option 1 where it has a scroll bar just for that area's overflowing content.
Here is the fiddle with the text so you can see how it differs, and with I'll call option 2 where it hides the overflowing content. (This is honestly bad practice and I wouldn't do it. So if I may suggest. I would go with option 1 of C).)
Here is the necessary css for C).
body {
padding-top: 150px;
}
.header {
position: fixed;
top: 0;
left: 0;
right: 0;
height: 150px;
background-color: #676767;
}
.main-content {
position: fixed;
top: 150px;
left: 0;
right: 0;
bottom: 0;
background-color: #ddd;
}
I won't explain it, but here is an article on positioning that will.
here is the only necessary css for option 1 is adding overflow-y: auto to .main-content, but if you want to go with option 2 which I don't suggest you can go with overflow-y: hidden on .main-content
Well that's all for my post which is probably too long for most people sorry if I bored you, but I'm just trying to help. Hope you figure out the layout you want. This is only a few examples of the layouts possible with good old css. If you don't get the layout you want from this or any other post feel free to send me a message by commenting below, and I'll be happy to answer it sometime. Hope this helped. If it didn't that's fine too. :)
You can try css3 flexbox.
http://jsfiddle.net/wL9aM/1/
.container {
display: -webkit-flex;
display: flex;
flex-direction: column;
height: 700px;
}
.header {
height: 200px;
background: red;
}
.main {
-webkit-flex: 1;
flex: 1;
background: blue;
}
try using script..
var window_h = $(window).height();
var header_h = $("header").height(); //This is what you said you had 150px
$(".filler_div").height(window_h - header_h);
You can also put that inside a function() so that you can add it also when you resize the browser, the filler space also adjusts...
function setfillerDivHeight(){
//the code above
}
$(document).ready(function(){
setFillerDivHeight(); //the initial setting of height
});
$(window).resize(function(){
setFillerDivHeight(); //reapply setting of height when window resizes
});
<div class="full-page-height-wrapper">
<header></header>
<main></main>
</div>
html,body {
height: 100%;
margin: 0;
}
header {
height: 150px;
}
.full-page-height-wrapper {
min-height: 100%;
position: relative;
}
CODE: http://fiddle.jshell.net/N7zJg/9/
preview: http://fiddle.jshell.net/N7zJg/9/show/
I don't think you cannot acheive that in pure CSS.
So, there is two different solutions:
1) You can put the 150px div in the 100% div.
2) You can do it with jQuery:
If your top div is <div id="A"> and the second one is <div id="B">, you'll have:
var b = $("#B");
var height = $("body").height() - b.position().top;
b.css({ height: height });
Feel free to adapt the code if you have some margins.
Found a solution myself finally. Doing it this way makes the design more responsive since (if i choose to add something to the bottom), it will automatically resize the div's height.
.container {
display: table;
}
.row {
display: table-row;
}
.column {
display: table-column;
}
#fullDiv {
height: 100%;
}
I found two solution.
The one is that I have must set the div in the absolute position.
the div float over the screen.
another one is use table-row display.
If you use just CSS, you cant achieve your task by giving 100% height to div. Because what basically CSS is doing is giving 100% height to your DIV plus giving 150 px to above header. Consider giving height of DIV less than 100% or some static value such as 600px or 700px.
Alternate is having a class of DIV with min-height 100% and inside it putting your header and body.

Have Image take up as much of window as possible, without exceeding borders

Now the title of the question may have been worded the wrong way.
I want the image to take up 100% of the width or heigh (I guess whichever is larger). Kind of like when you have a photoviewer and there make be a black border on the sides or the top, depending which way it is.
Obviously if it's a very small image I don't want it to stretch, I never want any of the images to stretch, I just want them to fill as much of the window out as they can.
For example, when you load an image on Google, it doesn't show it's fullest resolution. It shrinks it down to fit within the borders of the page if it is to big. Then you can click on it to zoom in if you want.
How would I accomplish this? Thanks.
I think you would actually need the following:
.container img {
max-width: 100%;
max-height: 100%;
width: auto;
height: auto;
}
This requires a container with an explicit height set to work.
Example:
http://jsfiddle.net/AtxYb/4/
This is pretty easy to accomplish with CSS alone:
.container img {
max-width: 100%;
height: auto;
}
The max-width ensures that it never exceeds 100% of the width of its container. height tells the browser to size the image normally (eg. it's not going to stretch it width-wise, but not height-wise) and is included for older browsers.
You can of course also reverse this if you wish to match a container's height instead of width.
edit:
As pburgess suggests, if you wish your image to match either width or height, you need to declare both. See this jsfiddle: http://jsfiddle.net/XxgkG/
.container img {
max-width: 100%;
max-height: 100%;
width: auto;
height: auto;
}
Note this will not work in IE6 and is shaky in IE7. If you're coding for these sad, lonely browsers you should check out this answer.
Demo Fiddle
img{height:auto;width:100%;}
Try re-sizing the window - The image will take up the maximum space .

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