What is the best way to merge two CSS classes into a single one?

Question

What is the best way to merge two CSS classes into a single one?

Currently, I am utilizing bootstrap to configure the correct classes on different elements for optimal layout across various devices. It appears that many of these elements require something along the lines of control-label col-md-2. However, after making changes to several elements, what if I realize that col-md-9 would be more suitable? It can become tedious to go back and modify each element individually. Therefore, my objective is to:

<label class="label-class"/>

using

.label-class {
   control-label col-md-9
}

Is this achievable? Every solution I encountered online regarding merging classes pertains to a different issue. Alternatively, if my approach is incorrect, I am open to learning a better method for testing multiple layouts :)

Edit: Following further research, I came across Can a CSS class inherit one or more other classes? - it appears that perhaps the answer is 'not without additional utilities' unfortunately.

html css twitter-bootstrap

Answer 1

Answer №1

To achieve your goal, you won't be able to do it using just CSS. Instead, consider using LESS files and a tool to convert them into CSS (fun fact: Bootstrap core is actually written in LESS). The specific feature you're looking for can be found here:

Bootstrap gives you the option to download its LESS files for customization, and then you can use a JavaScript compiler as explained on lesscss.org/usage/#using-less-in-the-browser

If you're working with PHP, there are libraries available to compile the code before sending it to the browser. I've had success using one that works well with Bootstrap 3.0, which you can find here:

I hope this information proves helpful! XD

Answer 2

To achieve your goal, you won't be able to do it using just CSS. Instead, consider using LESS files and a tool to convert them into CSS (fun fact: Bootstrap core is actually written in LESS). The specific feature you're looking for can be found here:

Bootstrap gives you the option to download its LESS files for customization, and then you can use a JavaScript compiler as explained on lesscss.org/usage/#using-less-in-the-browser

If you're working with PHP, there are libraries available to compile the code before sending it to the browser. I've had success using one that works well with Bootstrap 3.0, which you can find here:

I hope this information proves helpful! XD

Answer 3

Answer №2

If you prefer not to utilize .less and a compiler, one alternative is to utilize jQuery to apply classes once the document is ready:

$(document).ready(function() {
  $('.label-class').addClass('control-label col-md-9');
})

You have the option of creating a complete collection of these using a simple-to-modify function that combines bootstrap classes (btn-1 & btn-2), adds custom classes (btn-3), and includes inline css (btn-4 - but it's best not to overdo this as it can become messy quickly).

$(document).ready(function() {
  $('.btn-1').addClass('btn btn-danger btn-xl');
  $('.btn-2').addClass('btn btn-warning btn-xl');
  $('.btn-3').addClass('btn btn-success btn-sm custom-class-1 custom-class-2');
  $('.btn-4').addClass('btn btn-warning btn-xl').css('text-decoration','underline');

Answer 4

If you prefer not to utilize .less and a compiler, one alternative is to utilize jQuery to apply classes once the document is ready:

$(document).ready(function() {
  $('.label-class').addClass('control-label col-md-9');
})

You have the option of creating a complete collection of these using a simple-to-modify function that combines bootstrap classes (btn-1 & btn-2), adds custom classes (btn-3), and includes inline css (btn-4 - but it's best not to overdo this as it can become messy quickly).

$(document).ready(function() {
  $('.btn-1').addClass('btn btn-danger btn-xl');
  $('.btn-2').addClass('btn btn-warning btn-xl');
  $('.btn-3').addClass('btn btn-success btn-sm custom-class-1 custom-class-2');
  $('.btn-4').addClass('btn btn-warning btn-xl').css('text-decoration','underline');

Answer 5

Answer №3

As @Chococroc pointed out, the following are simple steps to follow:

Step1: Create a file named style.less

.label-class {
    .control-label;
    .col-md-9;
}

Step2: Include less.js in your project

<link rel="stylesheet/less" href="style.less" type="text/css" />
<script src="script/less-1.3.3.min.js"></script>

Make sure to add the JavaScript code after including the less files on your page.

For more details and rules regarding less, visit:

Answer 6

As @Chococroc pointed out, the following are simple steps to follow:

Step1: Create a file named style.less

.label-class {
    .control-label;
    .col-md-9;
}

Step2: Include less.js in your project

<link rel="stylesheet/less" href="style.less" type="text/css" />
<script src="script/less-1.3.3.min.js"></script>

Make sure to add the JavaScript code after including the less files on your page.

For more details and rules regarding less, visit:

What is the best way to merge two CSS classes into a single one?

Answer №1

Answer №2

Answer №3

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