I have CSS background image in header div. Image responsiveness works fine but I cant get it work so that content under header image "follows" image when it resizes.
Problem is that when I give height value to header image div then div height is fixed. And when I do not give height image is not shown at all.
See working example JSFIDDLE
Any help how to fix?
Here is your solution:
Issue:- Height value in percentage doesn't work, until unless it has been used in any position layer.
Solution:- Instead of height. Use "padding-bottom" OR "padding-top" value to make height responsive. Becasue percentage values work well with "padding".
The calculation is very simple to get the relevant responsive height value of any background image.
For Example:- If Background image dimensions are (1200 width) x (450 height) Pixels. Then image responsive "height" value would be: "37.5%"
Formula:- Y (×) 100 (÷) X. Which is (450×100÷1200) = 37.5%
Solution URL:- http://sandeepparashar.com/stackoverflow/responsive-css-background-image-height.html
Code:-
.custom-header-option {
padding-bottom:37.5%; /* This will make height responsive */
background-image: url('http://unplugged.ee/wp-content/uploads/2013/03/frank2.jpg');
background-repeat:no-repeat;
background-size:cover;
background-position:center;
}
If need more help, most welcome :)
I think what you're trying to do is to remove the "white space" gap?
Try this code: http://jsfiddle.net/0bjgfo16/4/
HTML
<img src="http://unplugged.ee/wp-content/uploads/2013/03/frank2.jpg" />
<div class="content-wrap">
<p>here is content</p>
</div>
CSS
* { box-sizing: border-box; padding: 0; margin: 0; }
img { max-width: 100%; float: left; }
.content-wrap {
width: 100%;
height: 200px;
background-color: grey;
color: #fff;
float: left;
}
I am trying to set the width of the .full_height_div element using pure css, based on its height. It has to be width-relative-to-height, and not height-relative-to-width. The reason for this is that the parent container (.set_rectangle_height) is already a div with height relative to the page width. Obviously, as the page is resized the divs on the page will resize, so i cannot set a fixed width in px for the .full_height_div child.
So .rectangle and .set_rectangle_height make up the parent container which has a width as a percentage of the page and a height relative to this width. See here for an explanation for this method.
But the problem is that then I want to place a div inside the parent with height: 100% and width relative to this height. The aim is then that I will be able to alter the browser window size and everything will keep its aspect ratio.
here is my failed attempt:
.rectangle
{
position: relative;
width: 30%;/*the outermost div is always a % of the page
width, even while resizing*/
display:inline-block;
background-color: green;
}
.set_rectangle_height
{
padding-bottom: 30%;/*this sets the height of the outermost div
to a ratio of 1:3*/
position: relative;
float: left;
width: 100%;
height: 100%;
}
.full_height_div/*this is the div that i want to have a width relative
to its height*/
{
height: 100%;
width: 20px;/*i will delete this once .square_set_width is working*/
position: absolute;
background-color: red;
}
.square_set_width
{
display: inline-block;
padding-left: 100%; /*i want to use something like this line to set
the width of this div to be equal to .full_height_div's height - ie a 1:1 aspect
ratio, but padding-left does not work :( */
position: relative;
height: 100%;
background-color: blue;
}
<div class='rectangle'>
<div class='set_rectangle_height'>
<div class='full_height_div'>
<div class='square_set_width'></div>
</div>
</div>
</div>
So, this is what the above incorrect markup looks like:
And this is what i want it to look like:
I know I could find the blue square percentage height in javascript, then set the width to be equal to this height, but it would be really handy if there is a pure css fix for what I am trying to do. I will be using this structure a lot and I don't really want to go writing code to resize all the divs on my page.
you have to use javascript for that. If I understood you, you want a perfect blue square. Use
var height = $('.square_set_width').height();
$('.square_set_width').css('width',height);
here is a jsfiddle: http://jsfiddle.net/a8kxu/
Edit: instead of doing padding-bottom: 30% do height: 70% instead. Here is another fiddle: http://jsfiddle.net/a8kxu/1/
Edit #2: Sorry, but you cant use css to do this. Its not powerful enough
If i understand you correctly
you can do
#divID {
width: 75%;
margin-left: auto; // this is used to center the container
margin-right: auto;// this as well
}
I have some photos which have big sizes, I would like to set them to the Parent's dimension size. If one time the parent dimension is 1200x800, I would like to set the photo dimensions to 1200x800, but also I would like to see the whole image. If my parent dimension is 500x300, I would like the image to be 500x300 and so on.
Is this even possible? I want to shrink the image or expand it according to it's parent's dimension.
Thanks!
The css property that you want is max-width :
Css
img {
max-width:100%;
}
You could add a container around your image and set overflow:hidden to prevent images to get bigger than the defined width/height.
Use this bit of css to scale your image:
img {
max-width: 100%;
max-height: 100%;
}
I might be naive, but isn't this as simple as this ?
img {
width:100%;
height:100%;
}
Try this in the image tag
<img src="url.jpg" width="100%" height="100%" />
Or set the backgound of the element as the image and do the same.
In general it might help to remember this:
1: A track is not a container.
2: A grid area is not a container.
3: A nested element is not a container unless you declare it as such.
Declarations such as max-width: 100%, object-fit: contain and so on describe how the element (e.g img) will behave inside its container - not inside the track or area it happens to have been placed in. And not inside the tag it lives in, nested inside its container. e.g after
HTML:
<div class="myContainer">
<div class="myTopRow">
<img src="myPic.jpg">
</div>
<div class="myBottomRow">
<span class="mySubText">Your subtext here.</span>
</div>
</div>
CSS:
.myContainer {
display: grid;
grid-template-rows: [row1Start] 1fr [row1End row2Start] 1fr [row2End];
grid-template-columns: [col1Start] 1fr [col1End];
}
.myTopRow {
grid-rows: row1Start / row1End;
grid-columns: col1Start / col1End;
}
.myBottomRow {
grid-rows: row2Start / row2End;
grid-columns: col1Start / col2End;
}
.myTopRow img {
max-width: 100%;
max-height: 100%;
object-fit: cover;
}
you've made a grid consisting of one column and two rows. The image in the top row will seem to spill over into the second row, colliding with that row's spanned text. In reality there's no overflow - the image is not contained by the top row (which has not been declared as a container, but is "merely" an area spanning tracks). Within it's actual container (the whole two-row box) the image is perfectly contained.
In the case the image is bigger than the parent container you have to set :
img {
max-width: 100%;
}
If your image is smaller you have to set instead
img {
min-width: 100%;
}
otherwise it will just stay at its original width and height.(the Height is set to auto by default)
try to use the max-width property, this might give a bug in earlier versions IE though
#custom img {
max-width: 100%;
max-height: 100%;
}
width: inherit;
height: inherit;
object-fit: contain;
I am working with images, and I ran into a problem with aspect ratios.
<img src="big_image.jpg" width="900" height="600" alt="" />
As you can see, height and width are already specified. I added a CSS rule for images:
img {
max-width: 500px;
}
But for big_image.jpg, I receive width=500 and height=600. How do I set images to be re-sized, whilst keeping their aspect ratios.
img {
display: block;
max-width:230px;
max-height:95px;
width: auto;
height: auto;
}
<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>
<img width="400" height="400" src="http://i.stack.imgur.com/aEEkn.png">
This will make image shrink if it's too big for specified area (as downside, it will not enlarge image).
Here's a solution:
object-fit: cover;
width: 100%;
height: 250px;
You can adjust the width and height to fit your needs, and the object-fit property will do the cropping for you.
More information about the possible values for the object-fit property and a compatibility table are available here: https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit
The solutions below will allow scaling up and scaling down of the image, depending on the parent box width.
All images have a parent container with a fixed width for demonstration purposes only. In production, this will be the width of the parent box.
Best Practice (2018):
This solution tells the browser to render the image with max available width and adjust the height as a percentage of that width.
.parent {
width: 100px;
}
img {
display: block;
width: 100%;
height: auto;
}
<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>
<div class="parent">
<img width="400" height="400" src="https://placehold.it/400x400">
</div>
Fancier Solution:
With the fancier solution, you'll be able to crop the image regardless of its size and add a background color to compensate for the cropping.
.parent {
width: 100px;
}
.container {
display: block;
width: 100%;
height: auto;
position: relative;
overflow: hidden;
padding: 34.37% 0 0 0; /* 34.37% = 100 / (w / h) = 100 / (640 / 220) */
}
.container img {
display: block;
max-width: 100%;
max-height: 100%;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
<p>This image is originally 640x220, but should get resized by the CSS:</p>
<div class="parent">
<div class="container">
<img width="640" height="220" src="https://placehold.it/640x220">
</div>
</div>
For the line specifying padding, you need to calculate the aspect ratio of the image, for example:
640px (w) = 100%
220px (h) = ?
640/220 = 2.909
100/2.909 = 34.37%
So, top padding = 34.37%.
Very similar to some answers here, but in my case I had images that sometimes were taller, sometimes larger.
This style worked like a charm to make sure that all images use all available space, keep the ratio and not cuts:
.img {
object-fit: contain;
max-width: 100%;
max-height: 100%;
width: auto;
height: auto;
}
The background-size property is ie>=9 only, but if that is fine with you, you can use a div with background-image and set background-size: contain:
div.image{
background-image: url("your/url/here");
background-size: contain;
background-repeat: no-repeat;
background-position: center;
}
Now you can just set your div size to whatever you want and not only will the image keep its aspect ratio it will also be centralized both vertically and horizontally within the div. Just don't forget to set the sizes on the css since divs don't have the width/height attribute on the tag itself.
This approach is different than setecs answer, using this the image area will be constant and defined by you (leaving empty spaces either horizontally or vertically depending on the div size and image aspect ratio), while setecs answer will get you a box that exactly the size of the scaled image (without empty spaces).
Edit:
According to the MDN background-size documentation you can simulate the background-size property in IE8 using a proprietary filter declaration:
Though Internet Explorer 8 doesn't support the background-size property, it is possible to emulate some of its functionality using the non-standard -ms-filter function:
-ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='path_relative_to_the_HTML_file', sizingMethod='scale')";
Remove the "height" property.
<img src="big_image.jpg" width="900" alt=""/>
By specifying both you are changing the aspect ratio of the image. Just setting one will resize but preserve the aspect ratio.
Optionally, to restrict oversizings:
<img src="big_image.jpg" width="900" alt="" style="max-width:500px; height:auto; max-height:600px;"/>
Firefox 71+ (2019-12-03) and Chrome 79+ (2019-12-10) support internal mapping of the width and height HTML attributes of the IMG element to the new aspect-ratio CSS property (the property itself is not yet available for direct use).
The calculated aspect ratio is used to reserve space for the image until it is loaded, and as long as the calculated aspect ratio is equal to the actual aspect ratio of the image, page “jump” is prevented after loading the image.
For this to work, one of the two image dimensions must be overridden via CSS to the auto value:
IMG {max-width: 100%; height: auto; }
<img src="example.png" width="1280" height="720" alt="Example" />
In the example, the aspect ratio of 16:9 (1280:720) is maintained even if the image is not yet loaded and the effective image width is less than 1280 as a result of max-width: 100%.
See also the related Firefox bug 392261.
Here is a solution :
img {
width: 100%;
height: auto;
object-fit: cover;
}
This will make sure the image always covers the entire parent (scaling down and up) and keeps the same aspect ratio.
Just add this to your css, It will automaticly shrink and expand with keeping the original ratio.
img {
display: block;
max-width: 100%;
max-height: 100%;
width: auto;
height: auto;
}
This is mental. Use the scale-down property - it explains itself.
Inline styling:
<img src='/nic-cage.png' style={{ maxWidth: '50%', objectFit: 'scale-down' }} />
This will stop flex from stretching it. In this case, the image would go to 50% of the width of its parent container and the height would scale down to match.
Keep it simple.
Just replace the height attribute by the aspect-ratio attribute.
img {
max-width: 500px;
aspect-ratio: 900 / 600;
}
<img src="big_image.png" width="900"/>
The aspect-ratio attribute is not necessary, but prevent image layout shifts.
To maintain a responsive image while still enforcing the image to have a certain aspect ratio you can do the following:
HTML:
<div class="ratio2-1">
<img src="../image.png" alt="image">
</div>
And SCSS:
.ratio2-1 {
overflow: hidden;
position: relative;
&:before {
content: '';
display: block;
padding-top: 50%; // ratio 2:1
}
img {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
}
}
This can be used to enforce a certain aspect ratio, regardless of the size of the image that authors upload.
Thanks to #Kseso at http://codepen.io/Kseso/pen/bfdhg. Check this URL for more ratios and a working example.
Set the CSS class of your image container tag to image-class:
<div class="image-full"></div>
and add this you your CSS stylesheet.
.image-full {
background: url(...some image...) no-repeat;
background-size: cover;
background-position: center center;
}
I would suggest for a responsive approach the best practice would be using the Viewport units and min/max attributes as follows:
img{
display: block;
width: 12vw;
height:12vw;
max-width:100%;
min-width:100px;
min-height:100px;
object-fit:contain;
}
To force image that fit in a exact size, you don't need to write too many codes. It's so simple
img{
width: 200px;
height: auto;
object-fit: contain; /* Fit logo in the image size */
-o-object-fit: contain; /* Fit logo fro opera browser */
object-position: top; /* Set logo position */
-o-object-position: top; /* Logo position for opera browser */
}
<img src="http://cdn.sstatic.net/Sites/stackoverflow/company/img/logos/so/so-logo.png" alt="Logo">
https://jsfiddle.net/sot2qgj6/3/
Here is the answer if you want to put image with fixed percentage of width, but not fixed pixel of width.
And this will be useful when dealing with different size of screen.
The tricks are
Using padding-top to set the height from width.
Using position: absolute to put image in the padding space.
Using max-height and max-width to make sure the image will not over the parent element.
using display:block and margin: auto to center the image.
I've also comment most of the tricks inside the fiddle.
I also find some other ways to make this happen.
There will be no real image in html, so I personly perfer the top answer when I need "img" element in html.
simple css by using background
http://jsfiddle.net/4660s79h/2/
background-image with word on top
http://jsfiddle.net/4660s79h/1/
the concept to use position absolute is from here
http://www.w3schools.com/howto/howto_css_aspect_ratio.asp
You can use this:
img {
width: 500px;
height: 600px;
object-fit: contain;
position: relative;
top: 50%;
transform: translateY(-50%);
}
You can create a div like this:
<div class="image" style="background-image:url('/to/your/image')"></div>
And use this css to style it:
height: 100%;
width: 100%;
background-position: center center;
background-repeat: no-repeat;
background-size: contain; // this can also be cover
You can set the container to display: flex and align-items: center (other align-items values work too). Instead of align-items you can also set align-self on the image itself.
This will make image shrink if it's too big for specified area (as downside, it will not enlarge image).
The solution by setec is fine for "Shrink to Fit" in auto mode.
But, to optimally EXPAND to fit in 'auto' mode, you need to first put the received image into a temp id,
Check if it can be expanded in height or in width (depending upon its aspect ration v/s the aspect ratio of your display block),
$(".temp_image").attr("src","str.jpg" ).load(function() {
// callback to get actual size of received image
// define to expand image in Height
if(($(".temp_image").height() / $(".temp_image").width()) > display_aspect_ratio ) {
$(".image").css('height', max_height_of_box);
$(".image").css('width',' auto');
} else {
// define to expand image in Width
$(".image").css('width' ,max_width_of_box);
$(".image").css('height','auto');
}
//Finally put the image to Completely Fill the display area while maintaining aspect ratio.
$(".image").attr("src","str.jpg");
});
This approach is useful when received images are smaller than display box. You must save them on your server in Original Small size rather than their expanded version to fill your Bigger display Box to save on size and bandwidth.
You Can use:-
transform: scaleX(1.2);
to change the width without changing height.
And
transform: scaleY(1.2);
to change the height without changing width
You can use this on images and video tags in html and css. This does not change the aspect ration also.
you can use aspect-ratio property css
.my-image {
aspect-ratio: 1/1; // square
aspect-ratio: 16/9; // wide screen 1080p
aspect-ratio: 4/3;
aspect-ratio: 2/3;
}
img {
max-width: 80px; /* Also works with percentage value like 100% */
height: auto;
}
<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>
<img width="400" height="400" src="https://i.stack.imgur.com/aEEkn.png">
<p>Let's say the author of the HTML deliberately wants
the height to be half the value of the width,
this CSS will ignore the HTML author's wishes, which may or may not be what you want:
</p>
<img width="400" height="200" src="https://i.stack.imgur.com/aEEkn.png">
How about using a pseudo element for vertical alignment? This less code is for a carousel but i guess it works on every fixed size container. It will keep the aspect ratio and insert #gray-dark bars on top/bottom or left/write for the shortest dimension. In the meanwhile the image is centered horizontally by the text-align and vertically by the pseudo element.
> li {
float: left;
overflow: hidden;
background-color: #gray-dark;
text-align: center;
> a img,
> img {
display: inline-block;
max-height: 100%;
max-width: 100%;
width: auto;
height: auto;
margin: auto;
text-align: center;
}
// Add pseudo element for vertical alignment of inline (img)
&:before {
content: "";
height: 100%;
display: inline-block;
vertical-align: middle;
}
}
Fullscreen presentation:
img[data-attribute] {height: 100vh;}
Keep in mind that if the view-port height is greater than the image the image will naturally degrade relative to the difference.
If the application can have an image of any aspect ratio or resolution then you can manage height and width as in this link.
This uses Javascript and HTML
https://stackoverflow.com/a/65090175/13338731
I want a background image that automatically fits the div size.
I have several div of the same class, each with different dimensions, is it possible to set the width and the height of the image, exactly to the dimension of the div ?
Do you think is better to use img or background-image?
P.S I don't know if is it possible to set the dimension of the background image, of course is possible for the tag img, but if I use the tag img the image is separated from the content (it dosen't overlap as a background)
Personally if you're going to modify things in this way, I think using img is better.
You can literally just set the height and width of the div if that's what you want.
<div class="box"><img src="Path/to/image.png"/></div>
and then the CSS would be something like this:
.box {
height: 300px;
width: 300px;
}
.box img {
height: 300px;
width: 300px;
}
That's one way of doing it anyway. You could also set it so that the height is 100% the size of the div, but the width is set to auto so that it scales with it. That way the image won't distort. Like this:
.box img {
height: 300px;
width: auto;
}
You could try something like this
<div style="width:200px;height:200px">
<img src="image.png" width="100%" height="100%"/>
</div>
With the background image, you'll not be able to resize the image to the exact dimensions of the div tag.