Hasty Treat - CSS Nesting 1

In this Hasty Treat, Scott and Wes talk about CSS nesting — what it is, when to use it, and why.

Prismic - Sponsor

Prismic is a Headless CMS that makes it easy to build website pages as a set of components. Break pages into sections of components using React, Vue, or whatever you like. Make corresponding Slices in Prismic. Start building pages dynamically in minutes. Get started at prismic.io/syntax.

Sentry - Sponsor

If you want to know what’s happening with your code, track errors and monitor performance with Sentry. Sentry’s Application Monitoring platform helps developers see performance issues, fix errors faster, and optimize their code health. Cut your time on error resolution from hours to minutes. It works with any language and integrates with dozens of other services. Syntax listeners new to Sentry can get two months for free by visiting Sentry.io and using the coupon code TASTYTREAT during sign up.

Show Notes

04:22 - What is it?

06:02 - Why nest?

Easier to read
Easier to write
Prevents refactoring errors, allows for dry-er code. No more typing a parent div 100 times, with a possibility of screwing it up.

08:13 - When to use nesting

Nesting is often overused
Only nest what you would have written un-nested with a short hand (e.g. don’t nest just for the sake of it)
- .container .item {} .container .item a {}
Use it for scoping

10:06 - Nesting prefixes

In order to nest CSS, you must first start it with a nesting selector

 .tweet {   & > p {   }   &.media-included { color: green; }   & + .tweet { } // sibling   & p { } // descentang }

Component-based — tweet, card, company, Link

 article{     color: blue;   & {         color: red;   } }

and must be the first child of a compound selector

12:44 - @nest rule / media queries

Mostly just a visual way to show nested

 .foo {     display: grid;     @media(orientation: landscape) {     & {             grid-auto-flow: column;         }     } }

 .foo {   display: grid;    @media (orientation: landscape) {     & {       grid-auto-flow: column;     }      @media (min-inline-size > 1024px) {       & {         max-inline-size: 1024px;       }     }   } } /* equivalent to    .foo { display: grid; }     @media (orientation: landscape) {      .foo {        grid-auto-flow: column;      }    }     @media (orientation: landscape) and (min-inline-size > 1024px) {      .foo {        max-inline-size: 1024px;      }    }  */

16:30 - How to use nesting today

Literally any CSS preprocessor
PostCSS to use spec

Tweet us your tasty treats!

Scott’s Instagram
LevelUpTutorials Instagram
Wes’ Instagram
Wes’ Twitter
Wes’ Facebook
Scott’s Twitter
Make sure to include @SyntaxFM in your tweets

Hasty Treat - CSS Nesting 1

Prismic - Sponsor

Sentry - Sponsor

Show Notes

Links

Tweet us your tasty treats!