Less Mixin Library

Less Mixin Library is a modular, lightweight collection of reusable mixins for Less CSS. It simplifies styling with utilities for layout, typography, transitions, gradients, flexbox, and more—ideal for scalable, maintainable front-end development.

Photo by Joshua Reddekopp / Unsplash

The Less Mixin Library is a simple, lightweight, and powerful toolkit designed to extend the capabilities of Less with clean, reusable, and modular mixins. Whether you're building responsive layouts, styling interactive components, or ensuring cross-browser compatibility, this library provides a structured, maintainable approach to writing DRY (Don't Repeat Yourself) stylesheets. With categories covering layout, typography, transitions, effects, flexbox, filters, gradients, and accessibility, it’s a go-to solution for front-end developers looking to streamline their workflow and maintain scalable CSS architecture.

Less Mixin Library is licensed under the MIT License.

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Features

Modular architecture for easy maintenance.
Well-organized mixins by category.
Cross-browser support with vendor prefixes.
Sensible defaults and clear documentation.

Installation

Download the library and import it into your main .less file:

@import "mixin-library.less";

Ensure all module files (utilities.less, layout.less, etc.) are in the same directory as mixin-library.less.

Example Usage

.button {
  .border-radius(5px);
  .box-shadow(2px, 2px, 4px, #999);
  .transition();
}

Modules

File	Description
`utilities.less`	Sizes, z-index, text transforms, custom borders
`layout.less`	Centering, triangles, circles, aspect ratio
`typography.less`	Font sizing, styles, shadows, ellipsis
`effects.less`	Opacity, box-shadow, blur, grayscale
`transitions.less`	Transitions and animation keyframes
`flexbox.less`	Flexbox containers, alignment, and ordering
`filters.less`	CSS filters (blur, hue-rotate, grayscale, etc.)
`gradients.less`	Linear, radial gradients, gradient borders
`responsive.less`	Responsive media query mixins
`accessibility.less`	Screen reader-friendly mixins
`forms.less`	Placeholder styling and font embedding

Test File

A complete test.less is provided to test mixin usage and output. You can compile it with lessc to generate CSS for validation.