Info: I have a cropped image used as a background image for the top of my webpage. In CSS I've defined in px the size of a div containing the image - which is cropping the image. (I'm doing this in Squarespace). So when you enter the page you see the background image (and some text) filling the screen and you then scroll down past the image.
The problem: when I reduce the size of the web browser window the div, of course, maintains the same px height. This means the image ends up being background for most of the page - I just want it to be on the top when you enter the page.
The question: how do I make the cropping div responsive in height? As far as I have researched I can only set the value in px which isn't responsive-friendly... The following code is based on my external screen size. So I need that height px for large screens.
My code:
.header-background {
position: absolute;
top: -160px;
left: -335px;
right: -335px;
height: 850px;
z-index: -1;
overflow: hidden;
background-size: cover;
background-position: center;
background-image: img src('/s/Sams-sort.png')
Give it to a free height that takes up the higher space only
height:auto
I have an image that I want to cover the full window of my browser upon loading the website. I've got it so that, as the width of the browser window increases or decreases, the image is resized while preserving the center alignment and aspect ratio by cropping out on either side. However, I want it so that, as the height of the browser window increases or decreases, the image is cropped from the bottom so that the bottom of the image always lines up with the bottom of the browser window and the top of the image is never cut off. In other words, when I scroll down, there should be no more image beneath the browser window to scroll over. I have the following HTML and CSS code:
HTML:
<div class="hs-slide hs-slide-count<?php echo $i; ?>">
<div class="hs-slide-overlay"></div>
<img src="<?php echo esc_url($hashone_slider_image); ?>" class="banner">
<div class="hs-slide-caption">
<div class="hs-slide-cap-title animated fadeInLeft">
<?php echo esc_html($hashone_slider_title); ?>
</div>
<div class="hs-slide-cap-desc animated fadeInRight">
<?php echo esc_html($hashone_slider_subtitle); ?>
</div>
</div>
</div>
CSS:
img.banner{
/* Set rules to fill background */
min-height: 100%;
min-width: 1024px;
/* Set up proportionate scaling */
width: 100%;
height: auto;
/* Set up positioning */
position: relative;
top: 0;
left: 0;
z-index: -1;
}
#media screen and (max-width: 1024px) { /* Specific to this particular image */
img.banner {
left: 50%;
margin-left: -512px; /* 50% */
}
}
How can I do this, ideally without JavaScript? Also, I got the CSS from a guide on filling the browser window with an image, and I don't know why the min-width in the HTML is specifically set to 1024px.
Update:
Example: https://jsfiddle.net/jbx8nco4/4/
Description specific to your code: You need to remove the <img> inside the .hs-slide container and instead use a background-image. After adding the background-image to .hs-slide (see code below), the .hs-slide element needs a height to be visible. You can either explicitly set one or let the element adapt to the height of its content. For the latter you would need to remove all positioning from .hs-slide-caption and give it a padding-top and padding-bottom. For simplicity I've set an explicit height in the example:
.hs-slide {
height: 800px;
background-image: url(http://placekitten.com/1000/500); /* replace with your image */
background-repeat: no-repeat;
background-size: cover;
background-position: center top;
}
The shorthand notation of this code would be:
background: url(//placekitten.com/1000/500) center top / cover no-repeat;
The background-attachment: fixed I mentioned in the first version of my comment is not needed as you want the image to scroll with your page.
By the way: as you have two background-images now, one being part of the .hs-slide-overlay, you could try getting rid of the overlay by combining the two background-images by using the notation for multiple background-images.
Old answer:
I am not completely sure but it sounds like what you want can be achieved by using a CSS background-image. I can't think of a Javascript-free solution using the HTML img tag.
You need to add the background-image to any element that stretches to the full width and height of the viewport and then set the appropriate attributes, most importantly background-size and background-position.
body {
width: 100%;
height: 100%;
background-image: url(//placekitten.com/1000/500);
background-repeat: no-repeat;
background-size: cover; // cover the whole area with the image
background-position: top; // expand image from the top
background-attachment: fixed;
}
The shorthand version for the background properties would be:
background-image: url(//placekitten.com/1000/500) no-repeat top fixed;
background-size: cover;
Here is a live example: https://jsfiddle.net/jbx8nco4/2/
Keep in mind, that background-size: cover is not supported by older browsers.
For further information and more techniques on using background-images for covering the full page see: https://css-tricks.com/perfect-full-page-background-image/
I have used a div-Container to insert a logo in it like this:
<div id="logo"></div>
The css looks like this:
#logo {
width: 333px;
height: 200px;
background-image: url("../img/logo1.png");
background-image: url("../img/logo0.svg");
}
However, when I try to rezise #logo (for example for devices with smaller screens), it does not resize the image being the background and the image is cut at the edges.
My question is: How to scale the .svg-image while the div-container is scaling?
Use background-size: contain;
Doc: https://developer.mozilla.org/en-US/docs/Web/CSS/background-size
contain
A keyword that scales the image as large as possible and maintains image aspect ratio (image doesn't get squished). Image is letterboxed within the container. When the image and container have different dimensions, the empty areas (either top/bottom of left/right) are filled with the background-color. The image is automatically centered unless over-ridden by another property such as background-position.
html {
min-height:100%;
background:url(http://kompozer.sourceforge.net/images/logo/kpz08-chinon.svg) no-repeat;
background-size:contain;
}
I'm stuck on something that should be very simple. I have a page that uses Semantic UI. On that page I have a logo image that is 200px wide by 388px high. The image is positioned absolutely, top left. It does not use any Semantic UI class. I want the image to shrink adaptively to the screen size. I have played about with min and max heights and widths, but the image will not change size at all.
The only way I got it to almost work was to replace the image with a div and set the image as a background. I got that adapting, but I couldn't maintain aspect ratio, and besides, that's not a satisfactory solution.
Here's an example of what I have;
<div class="ui inverted menu">....</div>
<img src="/img.png" class="logo">
<div class="ui page grid">.....</div>
/* css (separate file) */
.logo{
position: absolute;
top: 4px;
left: 6px;
z-index: 2;
min-height: 100px;
max-height: 388px;
width: auto;
}
This is just one of many variants I have tried and I have run out of ideas!
The best solution will be to put the image as a background-image and than set the background-size to cover.
.logo {
background-image: url(path/to/your/image.jpg);
background-size: cover;
}
This way, you'll maintain aspect ratio.
If you don't want parts of your image to be cut off, you can use background-size: contain; instead.
There is an object-fit/object-position method for your problem.
To keep aspect ratio for an img block just use:
object-fit: contain;
For placing img top left:
object-position: 0 0;
Don't forget to stretch image to 100% width and height:
width: 100%;
height: 100%;
Check out fiddle to play with it.
Please notice that this variant is not the best for cross-browser using, since there is no support for object-fit/object-position properties in IE 6-11, Edge and some Mobile Android browsers according to caniuse.
As Simon said before, I'd reccomend you using background-image for cases like this too.
I'm currently working on a mobile landing page for a company. It's a really basic layout but below the header there's an image of a product which will always be 100% width (the design shows it always going from edge to edge). Depending on the width of the screen the height of the image will obviously adjust accordingly. I originally did this with an img (with a CSS width of 100%) and it worked great but I've realised that I'd like to use media queries to serve different images based on different resolutions - let's say a small, medium and a large version of the same image, for example. I know you can't change the img src with CSS so I figured I should be using a CSS background for the image as opposed to an img tag in the HTML.
I can't seem to get this working properly as the div with the background image needs both a width and a height to show the background. I can obviously use 'width: 100%' but what do I use for the height? I can put a random fixed height like 150px and then I can see the top 150px of the image but this isn't the solution as there isn't a fixed height. I had a play and found that once there is a height (tested with 150px) I can use 'background-size: 100%' to fit the image in the div correctly. I can use the more recent CSS3 for this project as it's aimed solely at mobile.
I've added a rough example below. Please excuse the inline styles but I wanted to give a basic example to try and make my question a little clearer.
<div id="image-container">
<div id="image" style="background: url(image.jpg) no-repeat; width: 100%; height: 150px; background-size: 100%;"></div>
</div>
Do I maybe have to give the container div a percentage height based on the whole page or am I looking at this completely wrong?
Also, do you think CSS backgrounds are the best way to do this? Maybe there's a technique which serves different img tags based on device/screen width. The general idea is that the landing page template will be used numerous times with different product images so I need to make sure I develop this the best way possible.
I apologise is this is a little long-winded but I'm back and forth from this project to the next so I'd like to get this little thing done.
Tim S. was much closer to a "correct" answer then the currently accepted one. If you want to have a 100% width, variable height background image done with CSS, instead of using cover (which will allow the image to extend out from the sides) or contain (which does not allow the image to extend out at all), just set the CSS like so:
body {
background-image: url(img.jpg);
background-position: center top;
background-size: 100% auto;
}
This will set your background image to 100% width and allow the height to overflow. Now you can use media queries to swap out that image instead of relying on JavaScript.
EDIT: I just realized (3 months later) that you probably don't want the image to overflow; you seem to want the container element to resize based on it's background-image (to preserve it's aspect ratio), which is not possible with CSS as far as I know.
Hopefully soon you'll be able to use the new srcset attribute on the img element. If you want to use img elements now, the currently accepted answer is probably best.
However, you can create a responsive background-image element with a constant aspect ratio using purely CSS. To do this, you set the height to 0 and set the padding-bottom to a percentage of the element's own width, like so:
.foo {
height: 0;
padding: 0; /* remove any pre-existing padding, just in case */
padding-bottom: 75%; /* for a 4:3 aspect ratio */
background-image: url(foo.png);
background-position: center center;
background-size: 100%;
background-repeat: no-repeat;
}
In order to use different aspect ratios, divide the height of the original image by it's own width, and multiply by 100 to get the percentage value. This works because padding percentage is always calculated based on width, even if it's vertical padding.
Try this
html {
background: url(image.jpg) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
Simplified version
html {
background: url(image.jpg) center center / cover no-repeat fixed;
}
Instead of using background-image you can use img directly and to get the image to spread all the width of the viewport try using max-width:100%;.
Please remember; don't apply any padding or margin to your main container div as they will increase the total width of the container. Using this rule, you can have a image width equal to the width of the browser and the height will also change according to the aspect ratio.
Edit: Changing the image on different size of the window
$(window).resize(function(){
var windowWidth = $(window).width();
var imgSrc = $('#image');
if(windowWidth <= 400){
imgSrc.attr('src','http://cdn.sstatic.net/Sites/stackoverflow/company/img/logos/so/so-icon.png?v=c78bd457575a');
}
else if(windowWidth > 400){
imgSrc.attr('src','http://i.stack.imgur.com/oURrw.png');
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="image-container">
<img id="image" src="http://cdn.sstatic.net/Sites/stackoverflow/company/img/logos/so/so-icon.png?v=c78bd457575a" alt=""/>
</div>
In this way you change your image in different size of the browser.
You can use the CSS property background-size and set it to cover or contain, depending your preference. Cover will cover the window entirely, while contain will make one side fit the window thus not covering the entire page (unless the aspect ratio of the screen is equal to the image).
Please note that this is a CSS3 property. In older browsers, this property is ignored. Alternatively, you can use javascript to change the CSS settings depending on the window size, but this isn't preferred.
body {
background-image: url(image.jpg); /* image */
background-position: center; /* center the image */
background-size: cover; /* cover the entire window */
}
Just use a two color background image:
<div style="width:100%; background:url('images/bkgmid.png');
background-size: cover;">
content
</div>
Add the css:
html,body{
height:100%;
}
.bg-img {
background: url(image.jpg) no-repeat center top;
background-size: cover;
height:100%;
}
And html is:
<div class="bg-mg"></div>
CSS: stretching background image to 100% width and height of screen?
It's 2017, and now you can use object-fit which has decent support. It works in the same way as a div's background-size but on the element itself, and on any element including images.
.your-img {
max-width: 100%;
max-height: 100%;
object-fit: contain;
}
html{
height:100%;
}
.bg-img {
background: url(image.jpg) no-repeat center top;
background-size: cover;
height:100vh;
}
I was also facing your problem. Two solutions come to my mind through HTML and CSS :
Solution 1) HTML img tag
.img-container {
width: 100%;
border: 1px solid #000;
}
.img-container img {
width: 100%;
pointer-events: none;
}
<div class="img-container">
<img src="https://i.postimg.cc/ht1YnwcD/example.png">
</div>
Solution 2) CSS background image
First find width and height of your image file, you can right click on your image and choose Properties then go to details tab. you can see your image dimensions (according to the picture).
enter image description here
Then remember them.
.img-container {
width: 100%;
// height: calc(100vw / (your image width / image height));
height: calc(100vw / (812 / 133));
background-image: url('https://i.postimg.cc/ht1YnwcD/example.png');
background-position: top;
background-repeat: no-repeat;
background-size: 100% auto;
border: 1px solid #000;
}
<div class="img-container"></div>
I hope it was useful ;)