The Service Worker Lifecycle Explained

Explaining the lifecycle of Service Workers in PWAs and how to update them as fast as possible. - http://amp.gs/2wrU

#javascript

Five Common Mistakes When Writing React Components

We quite often find doing something wrong the first time is more instructive that doing it right and being none the wiser. The next best thing is to closely examine how somebody else did it wrong and learning from their mistakes instead of our own. - http://amp.gs/2FNc

#react

Configuring Application Color Scheme

Artur Basak has written an article about configuring the application color scheme using CSS Variables. - http://amp.gs/2Xqw

#css

Custom Decorators in Angular

Routine actions, repeated from time to time, lead to duplication of code and leave a bitter aftertaste of bad smell as the project grows. - http://amp.gs/2LRM

#angular

A Practical Guide to moment-timezone

If you like Moment’s approach to manipulating dates and times but work a lot with timezones, you might appreciate this extension which brings IANA’s time zone database to the party. - http://amp.gs/2WRQ

#nodejs

Track Your (Android) Smartphone in Physical Space with JavaScript

Leans on the Generic Sensor APIs so you’re limited to Android for now, but it’s fun to see the potential. - http://amp.gs/2ahk

#javascript

Context and Provider Pattern with the Vue 3 Composition API

Learn how to use the Vue 3 Composition API to replicate the React Context and Provider API. - http://amp.gs/2aL4

#vue

How to Use the React Testing Library

Being fully confident in React components requires a test regimen which enables you to experience the app as an end user would. This richly illustrated tutorial walks you though the React Testing Library. It just might make RTL your ‘go to’ testing library. - http://amp.gs/2oyI

#react

The Hamburger Menu

Mikael Ainalem shares a step by step guide to creating a Hamburger Menu in SVG & CSS. - http://amp.gs/2oMs

#css

Exporting a Web Page as PDF or PNG from Node

A walkthrough of using the Playwright browser automation library for fetching pages and creating screenshots of them, including dealing with cookies and auth. Browserless is also briefly covered for when you want to go into production. - http://amp.gs/2M7q

#nodejs

Quick Tip for Angular Forms: Keep your markAllAsTouched DRY

This article will help you keep your markAllAsTouched() dry when using Angular forms. - http://amp.gs/2M2L

#angular

How to Create a Web Worker-Driven Multithreaded Frontend App

It leans on an under-development Web Worker-driven framework called neo.mjs that promises “a new era of making better Web-based user interfaces.” - http://amp.gs/25Vh

#javascript

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A Visual Guide to React Mental Models (Part 2)

We featured Part 1 back in Issue 186 and here’s part 2 of this comprehensive three part article which encourages the use of helpful mental images for useState, useEffect and Lifecycles. - http://amp.gs/2Qly

#react

Writing a Vue component using TDD: a gentle introduction

In this tutorial, you'll learn the basic concepts of Test Driven Development (TDD) building a simple Vue.js component with TypeScript, using Jest for testing and setting up coverage and Continuous Integration with TravisCI. - http://amp.gs/2cZY

#vue

Advice for Complex CSS Illustrations

Jhey Tompkins shares a set of techniques that will help you create complex CSS illustrations. - http://amp.gs/26Z1

#css

Testing Angular routing components with the RouterTestingModule

This article teaches us about shallow and integrated routing component tests. The RouterTestingModule is useful for integrated routing component tests. To learn what the RouterTestingModule does, we discuss the Location service and its dependencies. - http://amp.gs/2b8X

#angular

Testing in Parallel with Mocha v8.0.0

Discover how running tests in parallel mode allows Mocha to take advantage of multi-core (or multiple) CPUs resulting in significant speedups for many large test suites. - http://amp.gs/wI81

#nodejs

A Deep Dive Into Relay, the Friendly and Opinionated GraphQL Client

The Relay framework enables declarative management of GraphQL data. It has the potential to be a worthy addition to your React toolkit so long as you are prepared to got with its flow. They call it ‘opinionated’ for a reason. - http://amp.gs/wjjN

#react