JavaScript

Detecting control-click, command-click, meta-click, alt-click and shift-click in JavaScript without listening to keydown events is straightforward. The naive approach is to bind aggressively to key events (keydown, keypress, keyup) and to maintain state of what is currently press ...

micro-analytics-events - A Node.js microservice to record analytics events to SQLite3 with Zeit’s “micro” In order to finally switch off Google Analytics, I need to replace my goal conversion tracking somehow. I’ve got pageview data using Simple Analytics ...

By default Jest runs tests in parallel with a “a worker pool of child processes that run tests” (Jest CLI docs). As per the Jest documentation, running tests in sequence (serially), can be helpful for debugging purposes and for test run performance reasons. ...

How does one identify whether a JavaScript file is being run directly (node file.js) or it’s being import/require-d (require('./file') in another JS file). In Python the pattern leverages the __main__ property in modules like so: if __name__ == '__main__': # do some ...

Add diagrams to your JAMStack (Jekyll/Hugo/Gatsby) blog with Mermaid JS Update 17th January 2024: Hugo now has native hooks for diagrams, so that code-fences using ```mermaid [content]``` can have a custom template, see the Content Management > Diagrams > Mermaid diagrams ...

How to use Yarn Workspaces to manage applications/coding examples. Lerna isn’t required when you don’t need the git diffing and versioning facilites. What’s more Yarn Workspaces are a great lightweight tool to get up and running faster for simple Node.js monore ...

Hugo “The world’s fastest framework for building websites” is a great option for JAMStack (JavaScript, APIs, prebuild Markup) sites. Lunr.js is “A bit like Solr, but much smaller and not as bright”, it’s a pure JavaScript implementation of a Solr-lik ...

JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. MDN Web Docs - javascript Detailed in this post are common JavaScript data type checks, pitfalls and idiomatic workarounds. ...

In computer science, test coverage is a measure used to describe the degree to which the source code of a program is executed when a particular test suite runs. Code coverage - Wikipedia Code coverage is usually used as a quality metric for software eg. “Our code has to have 80% ...

An example Netlify Lambda to fetch all “newsletter” posts from Pocket. Pocket is an application and web service for managing a reading list of articles from the Internet. It’s quite widely used and tightly integrated into the Firefox browser. I find that I use it extensive ...