NET Core 3. Blog Home. Select Category Popular Categories. NET My Dashboard. Sign out. Share on twitter. Share on facebook. Share on linkedin. Maithiliy K October 30, Introduction Dealing with a large volume of plain CSS can be annoying when you face weird styling issues.
What is a CSS Preprocessor? CSS If you are a new front-end developer, you must first know how to write basic CSS to better understand the workings of a preprocessor, as the preprocessor itself will compile and generate CSS in its final stage. Variables Similar to how you define variables in other programming languages, you can set a variable in LESS and access it throughout your program. Mixins A mixin is like a variable, but the only difference is that it represents an entire class.
Operations You can also perform basic arithmetic operations in LESS—such as addition, subtraction, division, and multiplication—on numeric values, colors, and variables. Functions There are also predefined functions available in LESS, allowing you to map JavaScript code to manipulate values, transform colors, and much more. Check out our components for different platforms from the following list: ASP. Preprocessors should still be used for nesting and mixins which are both coming to native CSS eventually.
Sass vs. Category: CSS. About the author. Denis Kryukov. Registered Last seen 2 years ago Stay Informed It's important to keep up with industry - subscribe! Stay Informed Looks good! Please enter the correct email. I agree with Privacy Policy Please confirm the subscription.
All right! Thank you, you've been subscribed. Looks good! JS React Node. Dillion Megida. Shadid Haque. Trapti Rahangdale. Beginners CSS. Login with your Social ID. Log in to Reply. Categories Programming JavaScript Tips Using the CLI we can lint the codes , compress the files, and create a source map. The command is based on Node. Make sure that Node.
Task runner is a tool that automates development tasks and workflows. Rather than run the lessc command every time we would like to compile our codes, we can setup install a task runner, and set it to watch changes within our LESS files, and immediately compile LESS into CSS. Two popular tools in this category today are Grunt and Gulp. We have a series of post that cover these tools.
Check ou the posts to learn how to deploy these tools in your workflow. For those who might not be accustomed to using Terminal and command lines, they can opt for a graphical interface instead. There are an abundance of applications to compile LESS today for all platforms — some free, some paid.
Which compiler you opt for aside from JavaScript does not really matter, frankly, so long as the tool works and complements your workflow, go for it. You can use any code editor. You could also isolate those values into separate rule sets; but with this method, the rule sets would keep growing as you add more colors across the website, leading to bloated selectors. LESS allows us to specify variables in one place—such as for brand colors, border lengths, side margins and so on—and then reuse the variables elsewhere in the style sheet.
The value of the variable remains stored in one place, though, so making a change is as simple as changing that one line. Variables start with an and are written like this:. For example, the following code:. Variables are great, but we often reuse more than single values.
We have to write at least three declarations just to specify it:. If you use a lot of CSS3, then this sort of repeating code adds up quickly. LESS solves this by allowing us to reuse whole classes simply by referencing them in our rule sets. Now login-box will inherit the properties of the rounded-corners class.
But what if we want more control over the size of the corners? No problem. First, we rewrite the original mixin to add the variable we want to manipulate:. Now, if we want our login-box to have a border radius of three pixels instead of five, we do this:. Rather than add more variables, we can perform operations on existing values with LESS.
For example, we can make colors lighter or darker or add values to borders and margins.
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