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FrontEnd Focus

Issue 277 — February 15, 2017
Some of the ideas currently in discussion at the W3C regarding the Selectors Level 4 Draft.
Arturo Campos


A significant change for one of the most used developer sites in the world. This post digs into the changes made and how they performed during A/B testing.
Stack Overflow


What is the performance reality of embedding external assets directly into pages or stylesheets? The conclusion is ‘Base64 still feels like a huge anti-pattern.’
Harry Roberts


Bugsnag

Get real-time crash alerts and collect detailed diagnostics so you can fix errors for your users. See deminified stacktraces with support for sourcemaps. Cut through front-end noise so you can efficiently assess the impact of errors. Learn more.
Bugsnag
  Sponsor


A simple, practical example of how CSS variables (supported in all major browsers except Edge) can lead to looser coupling and better code when JS needs to interact with CSS.
Sérgio Gomes


By default, Google Analytics tracks pageviews, but there are many other common on-page events that can be tracked (form submits, scrolling, page visibility). Autotrack makes this easier to do.
Google


Essentially a list of 113 HTML elements which link to pages explaining their use and the attributes they support, if any. There’s a similar reference for CSS too.
Jeremy Thomas


Covers basic HTML, CSS, the box model, flexbox, floats, etc. Suited for beginners but I found the flexbox page a good primer on its own.
Interneting Is Hard


The Web Speech API provides the ability to voice-enable your website by using the SpeechRecognition and the SpeechSynthesis interfaces.
Aaron Gustafson


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In Brief

Editor’s Draft of CSS Timing Functions Level 1 news
W3C

Achieving 60 FPS Mobile Animations with CSS3 tutorial
Jose Roasario shares tips for animating elements in mobile contexts.
Sitepoint

A Basic Introduction to CSS Attribute Selectors tutorial
e.g. href$="5555" for links to URLs ending in ‘5555’.
Tiffany Brown

Create data-intensive, feature-rich web and mobile apps with Sencha Ext JS tutorial
Learn how to design, develop and test data-intensive web apps that run on desktops, tablets, and smartphones with Sencha Ext JS
Sencha, Inc.  Sponsor

The Google Analytics Setup I Use on Every Site I Build tutorial
Philip Walton

Exercises in Flexbox: Simple Web Components tutorial
Zviad Sichinava

More HTML5 Semantics: New Elements and Features tutorial
Louis Lazaris

Creating a ‘Rollover’ Map of the US with SVG and JS tutorial
Chris Coyier

CSS Grid Layout Terminology, Explained tutorial
Ire Aderinokun

HTML Canvas Cheatsheet tutorial
Skilled

HTML5 for the Mobile Web: Browser Forms and Input Types story
An overview of new form controls, how they look, behave and are supported on various mobile browsers.
Ruadhán O’Donoghue

A Battle Rages for The Future of The Web opinion
The W3C, led by Sir Tim Berners-Lee, looks set to standardise DRM-enabling Encrypted Media Extensions (EME) in browsers.
Ars Technica UK

Front-end ? npm; npm ? you tools
Bring npm to work to unblock collaboration, quit reinventing the wheel, and build amazing things.
npm, Inc.  Sponsor

CSSO: A CSS Minifier with Structural Optimizations tools
Sergey Kryzhanovsky

A Collection of 180 Curated CSS3 ‘Web Gradients’ tools
itmeo

ScrollDir: Leverage Vertical Scroll Direction in CSS Via a Data Attribute code
Dollar Shave Club

SVGO: A Node-Based Tool for Optimizing SVG Files code
A long standing project but still getting frequent updates.

Rythm.js: Make Elements On Your Page ‘Dance’ code
A funny effect but warning: music autoplays.
Benjamin Plouzennec

Sticky-Kit: jQuery Plugin for Sticky Elements code
Attach elements to the page when the user scrolls.

Fluid Paint: A WebGL-based Painting Experience demo
A browser-based WebGL painting simulator. Code.
David Li

Curated by Peter Cooper and published by Cooperpress. If you like this, you may also enjoy: JavaScript Weekly, Node Weekly, and React Status.

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