Learn how to implement Lodash's countBy function in vanilla JavaScript using the reduce method to group and count objects by property.
Learn how to implement a groupBy function in vanilla JavaScript using the reduce method, without needing Lodash.
Learn two methods to replace all occurrences of a string in JavaScript: using regex with global flag and the newer replaceAll function.
A detailed guide on the author's process for creating concise, high-value educational videos, focusing on preparation and content structure.
Explains the differences between Object.is() and the strict equality operator (===) in JavaScript, focusing on NaN and -0 comparisons.
Explains the differences and purposes of package.json and package-lock.json files in Node.js projects, focusing on dependency management.
A beginner's tutorial on building a multiplayer game using Websockets with Vapor 4 (Swift) and Vanilla JavaScript for real-time communication.
An introduction to Netlify Functions, explaining how they simplify AWS Lambda by abstracting away complex configuration and deployment.
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Chromium 84 introduces new Web Animations API features like promise-based orchestration, performance improvements, and composite modes for smoother effects.
A guide to overcoming mental blocks in programming by focusing on problem-solving logic and embracing errors as helpful feedback.
A usability expert critiques the poor Developer Experience (DX) of modern JavaScript, highlighting common module import errors and tooling frustrations.
A technique for handling async/await in JavaScript without using try...catch blocks, using a utility wrapper function.
Explains the difference between own properties defined directly on an object and inherited properties from the prototype in JavaScript.
Explains how to properly configure WKWebView for headless background operation in iOS apps, including a key workaround for JavaScript execution.
An introduction to callback functions in JavaScript, explaining how they are passed as arguments and executed within other functions.
Explores methods for handling errors in JavaScript async/await functions without using bulky try/catch blocks.
A guide to creating and using custom error classes in JavaScript for both new errors and third-party errors.
A technical case study on A/B testing the instant.page prefetching library using Netlify's split testing and SpeedCurve for performance measurement.
Explains how to run k6 load tests from the cloud, including using custom Docker images and AWS ECS/Fargate for private or complex scenarios.
