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Jest is a delightful JavaScript Testing Framework with a focus on simplicity. jestjs.io Jest is a batteries-included framework. Due to its fully-featured nature and large surface area, we can compare it to test runners (Mocha), assertion libraries (Chai, ShouldJS, power-assert, ...

A common source of high latency in all types of applications (scripts, HTTP servers, CLI tools), is to run HTTP requests in sequence that could be run in parallel. We’ll be looking at how to achieve this in Go. Examples for concurrency in the Go ecosystem tend to be more ab ...

When writing technical documentation, blog posts or conducting code reviews, it can be useful to render backticks in Markdown inline code, code blocks or fenced code blocks. Since backticks are part of the Markdown syntax for inline code and code fences, this post looks at how to ...

The default diffing algorithm for git diff is by lines. There are scenarios where it’s more interesting to diff by word, for example: long lines. In that case it’s useful to use --word-diff=color. ...

The GitHub CLI (gh binary), defaults to nano as its editor. Developers may want to set it to vim or VSCode to keep it in line with the git CLI’s behaviour. ...

If anyone missed it, Node.js 18 includes a test runner/test definition module (node --test and node:test respectively). node:test exports a test function and you can run the Node CLI with a --test flag which does some basic search/matching for test files. Full Documentation: node ...

Alpine Day 2021 Talk: tackling Alpine FAQs, common issues & web patterns with Alpine.js ...

Why doesn’t React.useEffect run during a server-side render (SSR) for example when using it inside a Next.js application? The obvious spots in the docs for information like this are the React docs on useEffect and the React docs on string/static rendering neither of which m ...

This post goes through approaches to asserting on the scroll position. First we’ll see how to assert that we’re at the top of the page. Next we’ll look at 2 approaches to assert that we’ve scrolled to an element. The examples for this post are available at ...

In JavaScript and TypeScript, the “?.” operator is called optional chaining. It works in a similar fashion to the . (chaining) operator, except that it short-circuits instead of causing an error when a value is null or undefined. That means const obj = {}; console.log ...