Look at center of an image with CSS - javascript

I'm stuck in a problem.
I have a image on a website that has usually a larger width than the screen. What I want to do is to move this image so that you always look on the center, even if youre resizing the browser.
code like this:
.center {
position: relative;
margin-left: auto;
margin-right: auto;
}
<img class="center" src="picture.jpg">
does not help.
I cant find a proper solution. Using the image as CSS background would not help, as I want to change the images dynamically.
Is it even possible to do this with CSS? Or should I use JavaScript?
Thanks for reading!

Use a background image. You can change that not only with CSS (pseudo :hover), but also (and more effectively) with JavaScript.
.center {
background: transparent url('/path/to/image') center center no-repeat;
width: 100%;
height: 100%;
}
.center:hover {
background: transparent url('/path/to/another/image') center center no-repeat;
}
JavaScript (jQuery)
$('.center').css('background-image','url(/path/to/image)');

What about using Top:50% and Left:50% in your CSS to position to the middle of the image?

Bit late to the party but I think this is what you want:
.center {
position:absolute;
top:0; left:0; right:0; bottom:0;
margin:auto;
}

Related

Keep divs positioned relative to image

I am trying to create a "map" with divs over cities. I got the map in .svg format and using it as background with background-size: cover. I need the "city-divs" to stay positioned relative to the image (for example London div should be always over London position on my image). I can half-achieve this making the "city divs" absolute and then positioning it using vh and vw. However, if I resize the window or check on different computer, it messes up.
I guess pure css is not the correct way on doing this. Is there a way of achieving this or am I going completely wrong direction?
Closest I got was using this solution found on stackoverflow http://jsfiddle.net/fmenrd4z/ . This works for divs in the center of image just about right. Divs more to the left / right won't work as good.
Currently, I'm using this code.
HTML
<section id="map">
<div id="london">london</div>
<div id="paris">paris</div>
</section>
CSS
#map {
background-image: url(../img/maps/map.svg);
width: 100vw;
height: 90vh;
background-attachment: fixed;
background-position: center;
background-size: cover;
background-repeat: no-repeat;
}
#london {
position: absolute;
left: 31vw;
top: 35vh;
}
#paris {
position: absolute;
left: 60vw;
top: 73vh;
}
I suppose there must be solution for this problem. I've been searching the web for whole day today but didn't found anything.
I'm up for choosing completely different way of doing this. (Is there some javascript library etc..?)
Thanks in advance!
This will never work because you position the divs dimensions that are always changing depending on the screen it is displayed.
There is one of way of doing it by giving a fixed height and width of section #map in pixels for large screens and adding some media queries for mobile screens.
#map {
width: 600px;
height: 300px;
}
#media (max-width: 1024px){
#map {
width: 300px;
height: 150px;
}
}

Div with image over another div

I want to show an image over a menu in the right, but it doesn't work on IE and Microsoft Edge on Windows 10.
<div class="menuDiv">
<ul id="menu">
<div class="menu_image"></div>
<li><a><img src="img/image_1.png"></a>
<ul id="seccion_1"></ul>
</li>
<li><a><img src="img/report_image.png"></a>
<ul id="seccion_2"></ul>
</li>
</ul>
</div>
menuDiv uses menu of themeRoller of jqueryUI
.menu_image
{
right: 0px;
position: absolute;
content: url(../../../../../lib/img/image_logo.png);
background-repeat: no-repeat;
/* background-position: 98% 0%;*/
width: auto;
height: auto;
}
This is how it looks on Chrome and Firefox
This is how is looks on IE
How can I show the image on IE?
I set a similar example on jsfiddle
https://jsfiddle.net/kzxfu7j4/
add
.menu{
display: relative;
}
to your css or change your .menu_image as below:
.menu_image
{
content: url(../../../../../lib/img/image_logo.png);
background-repeat: no-repeat;
/* background-position: 98% 0%;*/
width: auto;
height: auto;
float:right;
}
Edit:
By the way make sure that the div has proper height and width, you can simply change its height and width to match the image height and width.
try this :
.menu_image
{
position: absolute; z-index: 9999;
content: url(../../../../../lib/img/image_logo.png);
background-repeat: no-repeat;
width: auto;
height: auto;
float:right;
}
If that not work, maybe it's the 'content' that the problem
I found a solution, I just set ":before" on the class menu_image and works
.menu_image:before
{
right: 0px;
position: absolute;
content: url(../../../../../lib/img/image_logo.png);
background-repeat: no-repeat;
/* background-position: 98% 0%;*/
width: auto;
height: auto;
}
The issue is your content CSS attribute. This is only valid when applied to ::before or ::after psudo-elements:
https://developer.mozilla.org/en/docs/Web/CSS/content
You have two options:
1) If the image is important in the context of the content (so you definitely want all users to see it) simply add an <img> in the markup.
Also, since you're positioning the images with absolute positioning, it makes more sense to me to add the actual <img> tag and position them directly as opposed to positioning empty div elements and setting the image as a background.
If the images represent navigational buttons, use this method 1.
2) If the image is not important to the content context, you can add it as a background image the conventional way, using:
background-image:url(...);
https://jsfiddle.net/rwhxpmfm/
Background images have accessibility issues (for example, they're not included when a webpage is printed on paper and screen readers can't access them...but screen readers can access an <img> element's alt attribute) so only use them if it's just for decoration and not part of the content's context.

Responsive image slider to fill div height

I'm trying to get a responsive image slider. It musts:
Fill the height of a div
Overflow on width
Be centered
It should be similar to http://www.niraalpina.com. I'm looking for a cross-browser compatible CSS solution that doesn't involve fixed dimensions.
I've uploaded the site to http://test5.twinzebras.com/, please have a look and let me know what I'm doing wrong.
Your best bet is to use a setup like this:
HTML
<div class="container">
<div id="img1"></div>
<div id="img2"></div>
</div>
CSS
.container {
width: 100%;
height: 100%;
}
#img1 {
background: url('../img.jpg') no-repeat center center;
background-size: cover; // also give 'contain' a go
}
If cover doesn't do what you want, try contain — I'm not quite sure which you're looking for.
Note: this solution relies on having a fixed-height div around the .container: This is entirely reliant on the rest of your site's setup, so we can't do much to help you there.
You can set width and height to 100% in img
#img1 {
background: url('../img.jpg') no-repeat center center;
width: 100%;
height: 100%;
}

Div to fill remaing vertical space

I have a complex HTML application, so unfortunately cannot really provide a code sample. We are trying to get the div (highlighted in red) to fill the remaining vertical space (see image).
The application consists of a header (in black), a sidebar on the left which can be dismissed or resized (note: the horizontal components resize correctly). To the right of the sidebar is another div (mainDiv). mainDiv contains a div at the top for the controls, and a div underneath it for the table of data (highlighted in red).
This table can potentially contain lots of data, so it needs its own scrollbar if the data doesn't fit on the screen.
We just want the table to fill all of the available horizontal and vertical space. We just can't seem to make it work.
We have created a jsfiddle example to demonstrate our layout as best we can. This can be seen here. We just want this div (in jsfiddle the div is called "tablewrap") to take up all of the remaining space.
Code (from jsfiddle) is as follows:
html
<div class="header">Header</div>
<div class="sidebar">This is the sidebar</div>
<div class="tablewrapper">
<div class="tableheader-controls-etc"></div>
<div class="tablewrap">table</div>
</div>
css
.header { height: 50px; background:black; color:white; }
.sidebar { height:100%; position:fixed; width 200px; background:gray; color:white; }
.tablewrapper{ float:right; width:75%; border:1px solid; margin-top:30px; margin-right:30px;}
.tableheader-controls-etc { height:150px; background:blue; color:white; }
.tablewrap { height: 200px; border: 2px solid red; width:100%; overflow:auto;}
If anyone can provide a solution that would be great. We would prefer CSS but can cope with Javascript.
Thanks,
Phil
The trick is to set position: absolute, then adjust the top, bottom, left and right properties as needed. See fiddle and explanation.
.tablewrap {
position: absolute;
top: 240px;
bottom: 0;
left: 150px;
right: 40px;
height: auto;
width: auto;
...
}
You can try this:
.tablewrap { height: 200px; border: 2px solid red; width:100%; overflow:auto; min-height:300px}
(Set the min-height as you want)
Well, it's time to say what you probably don't want to hear hehe: you can't do this with CSS.
You have to use javascript in order to find out two things:
Viewport height
Controls div height
Once you know those two heights, you can set your table height to:
finalHeight = viewport - (controls+header+footer)
If header and footer have also dynamic heights, use javascript to calculate them.
You will also need to recalculate this height on window resize. And of course your layout won't work if javascript is disabled.

CSS/JavaScript to crop image

How to target a specific location on the image to be cropped using css or javascript, simple way without big scripts,
Picture before :
I want the highlighted location on the following image to be viewed :
Not the exact highlighted though, just trying to explain it doesnt has to be from the very top, i want to select specific image scales,
AND how to resize is after cropping ?
Update 2022-05-27: A new property object-view-box will soon make this a lot simpler: https://ishadeed.com/article/css-object-view-box/
One approach is to use an element with overflow: hidden that has the image as a child, which itself is absolutely positioned within the context of the original element. The result being, the size of the overflow: hidden element masks the image.
Here's an example of the approach:
HTML
<div id='crop-the-cats'>
<img src='http://i.stack.imgur.com/ArS4Q.jpg'>
</div>​
CSS
#crop-the-cats {
width: 100px;
height: 80px;
overflow:hidden;
position:relative;
}
#crop-the-cats img {
position: absolute;
top: -60px;
left: -70px;
}
​See http://jsfiddle.net/Da9CT/
Another approach is to use the image as the background of the image and reposition it using background-position:
HTML
<div id='crop-the-cats'></div>​
CSS
#crop-the-cats {
width: 100px;
height: 80px;
background-image: url(http://i.stack.imgur.com/ArS4Q.jpg);
background-position: -50px -60px;
}
​See http://jsfiddle.net/Da9CT/2/
You can't crop image using javascript / css but you can position it inside an element with overflow hidden: http://jsbin.com/ebenem/1/edit
Let me know if that helps!

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