Question 1

How do I set up Less with Webpack or Vite?

Accepted Answer

Install the Less loader (e.g., less-loader for Webpack) and configure it in your build tool to compile .less files. This typically involves adding rules to your configuration file to process Less into CSS during the build step.

Question 2

Less vs Sass: which should I choose for a new project?

Accepted Answer

Choose Less for a simpler, CSS-like syntax with easier migration from plain CSS. Opt for Sass if you need advanced features like control directives, more built-in functions, or a larger ecosystem with frameworks like Bootstrap.

Question 3

How to use variables in Less for theming?

Accepted Answer

Define variables (e.g., @primary-color: #blue;) at the top of your Less files and reference them throughout. This centralizes values, making it easy to update themes by changing variable definitions.

Question 4

Can Less compile in the browser without a build step?

Accepted Answer

Yes, Less can run client-side by including less.js in your HTML, but this is not recommended for production due to performance issues. It's better for development or simple prototyping.

Question 5

How to avoid CSS duplication when importing files in Less?

Accepted Answer

Use the @import directive with the (reference) option to import Less files without outputting their CSS, or leverage mixins and namespaces to reuse styles without duplication.

Question 6

Does Less support CSS Grid or Flexbox?

Accepted Answer

Less is a preprocessor that compiles to CSS, so it fully supports all CSS features like Grid and Flexbox. You can write standard CSS within Less files, and it will compile as-is.

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