Drew Minns is a Developer, Designer and Educator from Toronto, Canada. Currently working as Lead Instructor and Developer for HackerYou, Drew stays on the edge of the industry to educate those around him.
One of the relatively recent tools introduced for styling is PostCSS, which aims to reinvent CSS with an ecosystem of custom plugins and tools. Working with the same principles of preprocessors such as Sass and LESS, it transforms extended syntaxes and features into modern, browser-friendly CSS. Over the next few years, the way you use CSS will change in many different ways. Every project will have different requirements, to which you will have to adapt your production methods. Working within a modular ecosystem like PostCSS allows you to pick and choose the features you want to complete a project.
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CSS quantity queries follow the concept of changing the styles based on a condition: the condition within a quantity query being the number of sibling elements. An example would be navigation where items are 25% wide when four items are available; yet when there are five items available, the width of the navigation items changes to 20%. This is a common problem with dynamic site frameworks like WordPress or Ghost. Can you avoid too many media queries and JavaScript workarounds? Yes, you can. This is where quantity queries are best used. By being creative with CSS selectors, we can count the number of sibling items and apply styles if they meet the conditions. Using these queries, we can future-proof our designs and projects, and allow them to scale gracefully.
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Quantity queries and quantity ordering are advanced concepts and might be scary for beginners. However, as we move presentational styling away from programming languages and into CSS, we should use these tools more and more. Even as many members of our industry explore content queries, we can now use quantity queries to modify the order of content simply by counting. If you had to create a table of items, you might assume that JavaScript would be the best solution — just loop over the items, and if there are more than three, update the styling. But what if I told you could do it with CSS alone?
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