TENJAVASCRIPT #219

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What's coming in TypeScript 4?

TypeScript 4 is coming up fast: a first beta release is planned for this week (June 25th), with the final release aiming for mid-August. It's important to note that TypeScript does not follow semver, so 4.0 is not as big a deal as it sounds! There can be (and often are) breaking changes between any minor TypeScript versions, and major version bumps like this happen primarily for marketing reasons, not technical ones.

#TypeScript

What's New In DevTools (Chrome 85)

Style editing for CSS-in-JS frameworks, Lighthouse 6.0, new JavaScript features, and more.

#Tooling

Fullstack JavaScript Microservice Web App in Minutes

This article shows how to quickly prototype a web app that consists of the following main architecture components: We’re going to use the SMF framework, which helps generate the boilerplate code…

#Full-stack

Welcoming Safari to the WebExtensions Community

At yesterday’s WWDC event, Apple announced that Safari is adopting a web-based API for browser extensions similar to Firefox’s WebExtensions API. Built using familiar web technologies such as JavaScript, HTML, and CSS, the API makes it easy for developers to write one code base that will work in Firefox, Chrome, Opera, and Edge with minimal browser-specific changes. We’re excited to see expanded support for this common set of browser extension APIs.

#WebAPIs

Deploying to Github Pages? Don't Forget to Fix Your Links - Maxim Orlov

Is your site not working after you’ve deployed to Github Pages? You see a blank page, or maybe the homepage shows up fine, but then you click on a link and nothing happens. You pop up dev inspector only to find a bunch of 404 status codes. It happens to many developers — the website works fine on localhost but after deploying to Github Pages, everything breaks.

#Hosting

An in-depth beginner's guide to testing React applications

The goal of this blog post is to act as a guide for your first tests. We'll take a small application as an example and cover it with tests. We will discuss what we should test and why we should test it. We will see different techniques that can help us to write tests with confidence without relying on trial and error.

#React

6 Tools You Can Use to Check for Vulnerabilities in Node.js

Vulnerabilities can exist in all products. The larger your software grows, the greater the potential for vulnerabilities.

#Security

Memory in Javascript — Beyond Leaks

JavaScript is a very high-level language. As such, most developers don’t tend to think a lot about how data is stored in memory. In this article, we will go over how data is stored in the memory, how it affects the CPU and memory and how the way you distribute and access your data in JS affects performance.

#Performance

GitHub - alexpusch/dotago.js

Silly syntactic sugar for creating relative dates and time durations with Javascript

#LearnFromCode

Understanding client-side web development tools

Client-side tooling can be intimidating, but this series of articles aims to illustrate the purpose of some of the most common client-side tool types, explain the tools you can chain together, how to install them using package managers, and control them using the command line. We finish up by providing a complete toolchain example showing you how to get productive.

#Tooling

📺 Strict Mode Screencasts

JS-focused screencast series. Videos come up every week exploring and explaining JavaScript language features, libraries, frameworks, and sometimes even entirely new programming languages for the Web. Find the latest issue here. — I.

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