CSS

In this article, Cláudio Ribeiro looks at the exciting new possibilities surrounding variable fonts — now bundled with the OpenType scalable font format — which allows a single font to behave like multiple fonts.

Craig Buckler lists 7 of the most popular code playgrounds tfor experimenting with your front-end code, such as CodePen and JSFiddle, along with suggestions for playing with back-end code, hosting your own code playground, and even installing an offline code playground in your own browser!

Craig Buckler shows how to add another dimension to your web pages and applications with the new 3D transformation functions and properties in CSS, covering transform, translate, rotations, scaling, perspective and more, along with z-index, browser gotchas, and ideal use cases.

Ivaylo Gerchev looks at the most downloaded front-end frameworks available today, and offers some suggestions on how to choose one that's right for you.

Animation is a part of a UI designer's job. Here are 9 free animation libraries we think deliver the most power for the smallest file size, while being relatively easy to use for reasonably code-savvy designers that aren't full-blown developers.

Maria Antonietta Perna walks you through CSS variables/custom properties, the awesome new technology that adds more flexibility and fun to CSS coding.

Craig Buckler gives you an accessible introduction to using media queries with JavaScript with matchMedia for a robust responsive design approach.

Craig Buckler demonstrates a neat trick for applying CSS3 transforms to background images. Rotating and skewing elements with stunning backgrounds will now be a breeze!

Christian Krammer walks you through the basics of Flexbox, showing how you can use flexbox to lay out specific page elements, and also how flexbox can serve as a handy fallback method in browsers that don't yet support CSS Grids.

Ahmad Ajmi introduces CSS Grid Layout Module, showing beginner-friendly examples of how to use CSS Grid, as well as discussing current browser support and what to do if you need to support older browsers — from using a mobile-first layout as a fallback, to using other CSS fallbacks and even a polyfill.

Ivan Čurić covers the basics of CSS parsing, how to measure CSS selector performance, and how to deal with multiple render passing on dynamic pages.

David Attard reviews 15 Bootstrap tools and playgrounds for improving your workflow and making it easier to get started with the Bootstrap CSS Framework.

Maria Antonietta Perna takes Bootstrap as representative of CSS frameworks, asking if there are still reasons to use frameworks now that we have CSS Grid.

Ahmed Bouchefra introduces key Bootstrap CSS classes for building layouts with the Bootstrap grid system, along with a quick introduction to using Flexbox.

Maria Antonietta Perna lists a number of Bootstrap UI libraries to style your Angular, React, and Vue.js components.

Zeeshan Chawdhary demonstrates how to use Bootstrap with Vue.js, using Bootstrap-Vue to replace Bootstrap’s dynamic components' reliance on jQuery.

Manjunath M. shows how to combine Bootstrap with React, exploring tools for building a UI with Bootstrap’s look and feel in a React-powered web application.

Ahmed Bouchefra shows how to bring together Bootstrap and WordPress, creating a simple WordPress theme that integrates the latest version of Bootstrap.

Ahmed Bouchefra shows how to incorporate the Bootstrap card component into your web pages to create great layouts and page content organization.

Ilya shows how to style form elements with the Bootstrap form component, using Bootstrap’s grid system, horizontal and inline layouts, and validation tools.

Ilya Bodrov explains the purpose and usage of Bootstrap utility classes, digging into some of the best of them and where you’ll find them most useful.

Craig Watson explains how to set up a responsive type scale with Bootstrap, so that your site’s typography will scale responsively on all devices.

Maria Antonietta Perna illustrates how you can customize Bootstrap plugins, modifying both the CSS files and the JavaScript files.

Maria Antonietta Perna points out the importance of front-end optimization and lists 3 tips for achieving a great user experience on your Bootstrap website.