How can I resize and horizontally align an image using html/css?

Question

How can I resize and horizontally align an image using html/css?

Is it possible to resize, crop and center an image using only HTML/CSS? (Using the img tag or CSS sprite)

For instance, if I have a 500x500 pixel image,

I would like to resize it to a 250x250 pixel image
To make the actual visible image 100x100 pixels but maintain the scale of a 250x250 sized image.
I want the center of the image to be located at coordinates x,y.

If this is not achievable with solely HTML/CSS, how would you suggest approaching it with JavaScript?

Edit - 動靜能量:

Regarding point (2), assuming my scaled image is now 200x200 and I desire my visible image to be 100x100: Essentially, what I am trying to convey is that I wish for the scale and resolution of the image to remain at 200x200 while positioning the visible image at 100x100. In other words, the visible image should occupy coordinates x,y: 0,0; 0,100; 100,0; 100,100; within the 200x200 image. Apologies for any confusion in my explanation.

javascript jquery html css

Answer 1

Answer №1

Update: See an example here http://jsfiddle.net/LTrqq/5/

If you want to achieve this effect:

You can simply use CSS properties like width and height for the <img> element
You can do it by applying (1), placing the image inside a div with position: absolute, specifying a desired top and left, then placing this div within another div with position: relative. The outer div can have properties such as width: 100px, height: 100px, and overflow: hidden
Similar to (2), but with different values for top and left

The reason we use position: relative for the outer div in (2) is to ensure that the inner div positions relative to the outer div rather than the entire document.

For setting the values of top and left, consider using something like top: -50px; left: -50px as demonstrated in the example above.

Answer 2

Update: See an example here http://jsfiddle.net/LTrqq/5/

If you want to achieve this effect:

You can simply use CSS properties like width and height for the <img> element
You can do it by applying (1), placing the image inside a div with position: absolute, specifying a desired top and left, then placing this div within another div with position: relative. The outer div can have properties such as width: 100px, height: 100px, and overflow: hidden
Similar to (2), but with different values for top and left

The reason we use position: relative for the outer div in (2) is to ensure that the inner div positions relative to the outer div rather than the entire document.

For setting the values of top and left, consider using something like top: -50px; left: -50px as demonstrated in the example above.

Answer 3

Answer №2

I came up with this solution on the fly, so it may not be perfect but it should give you a good starting point. The -X and -Y coordinates are what determine the crop offset. For instance, to crop from 20x30, you would set them to -20px and -30px.

<style>
    #crop { width: 100px; height: 100px; display: block; overflow: hidden; position: relative; }
    #crop img { position: absolute; left: -X; top: -Y; }
</style>

<div id="crop">
    <img src="500x500.jpg" width="250" height="250">
</div>

If you prefer to center the image and know the size of the image in the crop container, you can use this alternative CSS:

#crop img { position: absolute; left: 50%; top: 50%; margin: -125px 0 0 -125px; }

Since 125px is half of 250, it should align the image in the center.

Answer 4

I came up with this solution on the fly, so it may not be perfect but it should give you a good starting point. The -X and -Y coordinates are what determine the crop offset. For instance, to crop from 20x30, you would set them to -20px and -30px.

<style>
    #crop { width: 100px; height: 100px; display: block; overflow: hidden; position: relative; }
    #crop img { position: absolute; left: -X; top: -Y; }
</style>

<div id="crop">
    <img src="500x500.jpg" width="250" height="250">
</div>

If you prefer to center the image and know the size of the image in the crop container, you can use this alternative CSS:

#crop img { position: absolute; left: 50%; top: 50%; margin: -125px 0 0 -125px; }

Since 125px is half of 250, it should align the image in the center.

Answer 5

Answer №3

If you want to resize an image to a specific dimension and achieve a cropped look, you can place it in a div and hide the overflow. However, if you need to actually crop the image for someone to download a copy that is cropped and scaled, check out this link:

Alternatively, if you are able to use PHP, is a very user-friendly option. Just upload it to your server and update your img tag src accordingly. example: < img src="/timthumb.php?mycat.jpg&h=250&w=250" />

Answer 6

If you want to resize an image to a specific dimension and achieve a cropped look, you can place it in a div and hide the overflow. However, if you need to actually crop the image for someone to download a copy that is cropped and scaled, check out this link:

Alternatively, if you are able to use PHP, is a very user-friendly option. Just upload it to your server and update your img tag src accordingly. example: < img src="/timthumb.php?mycat.jpg&h=250&w=250" />

How can I resize and horizontally align an image using html/css?

Answer №1

Answer №2

Answer №3

Similar questions

Is it possible to send array data in a jQuery AJAX call using the GET method?

Replicate the action of highlighting a section of a website and copying it to the clipboard using JavaScript

Is your Node.js HTTP Request failing to function properly?

How can I vertically center a back button in jQuery Mobile?

Issue with Redirecting in React: REST requests are not successful

Encountering a server issue when sending back a SelectList via ajax

What is the best way to retrieve all string constants from HTML or JSX code?

Having trouble populating Extjs Grid with JSON data

What is the process for adding new data to a data source without overwriting existing information?

Place an animated object in the center with the display style set to

Creating Test Cases for Service Response Validation

A self-destructing javascript/jquery function that removes itself after running

Send myArray via ajax to php

Transferring Arrays to AJAX communication

Effortless script to make a URL request and display the response status | using JavaScript with jQuery

Is it feasible to send a GET form to two separate views using two buttons?

Show and conceal columns in HTML with the help of JavaScript

The Jquery.post() function failed to trigger the callback

Implementing a filter on retrieved data from an API in a React application

What is the best way to update specific values in a react multiselect component?