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I know that width and height property of HTML images can be set simply by <img src="Debian.jpg" style="height: 120px; width: 130px">.
What I am looking for is if there exists a single CSS property that takes only one value in % and scales the width and height of the original image according to that percentage. For example, if the height and width of Debian.jpg are 1000x700 and I specify 50% in that CSS property then the image scales down to 500x350 and hence the aspect ratio is maintained.
It's very hard for me to maintain the aspect ratio of the image while adjusting the height and width separately. If a property like that does not exist then is there any way to maintain the aspect ratio and achieve desirable dimensions of the image?
801
One of the simplest ways to resize an image in the HTML is using the height and width attributes on the img tag. These values specify the height and width of the image element. The values are set in px i.e. CSS pixels. For example, the original image is 640×960.
Step 1: Firstly, we have to type the Html code in any text editor or open the existing Html file in the text editor in which we want to change the size of an image. Step 2: Now, place the cursor inside the img tag. And then, we have to use the height and width attribute of the img tag for changing the size of an image.
The height and width of an image can be set using height and width attribute. The height and width can be set in terms of pixels. The <img> height attribute is used to set the height of the image in pixels. The <img> width attribute is used to set the width of the image in pixels.
Yes, there is a way to maintain the image's aspect ratio and resize the image to a fraction of its original size. However, CSS cannot know the intrinsic size (the original size) of the image. Therefore, you can only do two things:
Using percentage value as the width value for img doesn't work simply because percentage value resolves to, well, a percentage of its container size, not its original size. Below, I demonstrated the not-working examples.
That being said, I personally usually want to specify the width of the image explicitly. For example, on large devices, I want the image to be 1080px. On smaller devices, I want the image to be 560px. I can simply make a container for the image of an explicit size, place the image inside the container, and specify the image's width to 100% (of its container size).
As mentioned, there are two ways to make an image 50% of its original width. First, using JS. Second, tell the CSS explicitly the original image width.
intrinsicsize attribute and set the width and style through CSS (still experimental and not supported). The last two solutions, as mentioned, are not supported by most browsers and may not work properly yet.
In my opinion, your best bet to set an image's width to 50% its intrinsic width is by using JS. Here's a solution demonstrating the what-doesn't-work solutions and the JS solution. Aspect ratio is automatically maintained if you only change one of the image's size (width/height).
const imageJS = document.querySelector('.image--changed-with-js')
imageJS.onload = () => {
const intrinsicWidth = imageJS.width
imageJS.width = imageJS.width / 2
}* {
box-sizing: border-box;
}
body,
html {
margin: 0px;
}
img {
margin: 20px 0;
}
/* Image has its intrinsic size (i.e. the original image size) */
.image--original {
width: auto;
}
/* Image contained within a 500px container
Image has a width of 50% of 500px = 250px */
.container {
width: 500px;
}
.image--changed-with-container {
width: 50%;
}
/* Image is not contained within a div
However, image is inside body
<body> is its container
It now has a width of 50% of the body
NOT 50% of its intrinsic width */
.image--changed-without-container {
width: 50%;
}
/* Image changed using JS
You can get the intrinsic size through JS and modify its size there */
.image--changed-with-js {}<img class="image--original" src="https://img.freepik.com/free-vector/abstract-galaxy-background_1199-247.jpg?size=626&ext=jpg">
<div class="container">
<img class="image--changed-with-container" src="https://img.freepik.com/free-vector/abstract-galaxy-background_1199-247.jpg?size=626&ext=jpg">
</div>
<img class="image--changed-without-container" src="https://img.freepik.com/free-vector/abstract-galaxy-background_1199-247.jpg?size=626&ext=jpg">
<img class="image--changed-with-js" src="https://img.freepik.com/free-vector/abstract-galaxy-background_1199-247.jpg?size=626&ext=jpg">If you set the width to a fixed number of pixels, e.g. img { width: 500px; }, the height will adjust accordingly to maintain the same aspect ratio. If you set the height, the width will adjust accordingly to maintain the same aspect ratio.
If you set the width to a percentage, e.g. img { width: 50% }, the browser will assume you mean a percentage of the element's container. The height will adjust accordingly to maintain the same aspect ratio.
However, if you set the height to a percentage, e.g. img { height: 50% }, that just won't work for various reasons.
3
The solution is really simple. To preserve the aspect ratio, all you need to do is set the height and width CSS properties like:
#theImage {
width: 100%;
height: auto;
}<img id="theImage" src="https://cdn.pixabay.com/photo/2015/04/23/22/00/tree-736885__340.jpg">By setting the width property to 100%, you are telling the image to take up all the horizontal space that is available. With the height property set to auto, your image's height changes proportionally with the width to ensure the aspect ratio is maintained. The end result is an image that scales up or down perfectly.
The downside of this solution is that a single image cannot effectively display across the range of resolutions on which your content may be viewed. For a more comprehensive solution, you need to bring in media queries and images of varying sizes to replace a lower resolution image when the time is right
3
My suugestion is to remove the specified sizes you put. Yes there is a code that can be specified in css. in html do like that:
<img src="Debian.jpg" alt="Debian Image" class="myCustomImages">
in css do something like that:
.myCustomImages {
max-width: 50%;
max-height: 50%;
}
So as I understand, You want to keep the image aspect-ratio while defining it's scale in percentage of the original size. Below is my suggestion:
When the image is inside a container with display: inline-block, you can define a width for an image in css, and it will be relative to itself (if the parent have display: block it will be relative to it's parent, if it's display:inline it will be relative to the nearest block parent).
When you define one of the dimentions (width or height) and not the other, by default it's keep the aspect ratio.
So what I suggest to do is wrap the image in an inline-block parent, and define only width in a percentage. like this:
div {
display: inline-block;
}
#half {
width: 50%;
}
#original {
width: 100%;
}
#big {
width: 150%;
}<h1>Image 400X267</h1>
<h3>50% size</h3>
<div>
<img id="half" src="https://bloximages.newyork1.vip.townnews.com/unionleader.com/content/tncms/assets/v3/editorial/f/f4/ff44150d-01ca-5e2d-8f7d-9d17e9faadd4/5dfa95339e09c.image.jpg?resize=400%2C267"/>
</div>
<h3>100% size</h3>
<div>
<img id="original" src="https://bloximages.newyork1.vip.townnews.com/unionleader.com/content/tncms/assets/v3/editorial/f/f4/ff44150d-01ca-5e2d-8f7d-9d17e9faadd4/5dfa95339e09c.image.jpg?resize=400%2C267"/>
</div>
<h3>150% size</h3>
<div>
<img id="big" src="https://bloximages.newyork1.vip.townnews.com/unionleader.com/content/tncms/assets/v3/editorial/f/f4/ff44150d-01ca-5e2d-8f7d-9d17e9faadd4/5dfa95339e09c.image.jpg?resize=400%2C267"/>
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