Cassidoo.co is the personal blog of Cassidy Williams, a well known developer, speaker, and educator who writes about JavaScript, React, career growth, web development, dev tools, and learning in public. Her posts mix technical insights with approachable explanations, covering topics like UI patterns, coding tips, productivity workflows, and the human side of software engineering. Cassidy is known for her weekly newsletter, open-source work, and community involvement.
151 articles from this blog
Explains how to use JavaScript's getAnimations() method to pause CSS animations on an element.
Introduces the ABCD framework for giving and receiving effective feedback on technical work like blog posts, tutorials, and projects.
A developer reflects on an 11-year-old GitHub issue being closed, musing on career changes and tech evolution.
Explains the CSS clamp() function for responsive design, covering its syntax, use cases, and advantages over media queries.
A technical guide on using Codemods to automate codebase upgrades and migrations, with examples from Next.js.
A guide on using GitHub Actions to automatically mark stale pull requests and issues in your open source repositories.
A technical guide explaining how to change the author and committer timestamps for Git commits, including recent commits and those deeper in history.
A detailed account of a sophisticated email scam involving hidden forwarding and reply-to settings, with advice for thorough account security checks.
An explanation of how reducers work in programming, with a practical code example from a live coding stream.
A developer discusses the non-deterministic nature of LLMs like GitHub Copilot, arguing that while useful, they cannot take ownership of errors like a human teammate.
An analysis of AI video generation using a specific, complex prompt to test the capabilities and limitations of models like Sora 2.
A review of the Notebook Navigator plugin and Cupertino theme for Obsidian, focusing on improving the mobile note-taking experience.
A review of Fliiip Book, a free web-based GIF animation tool with features like onion skinning and keyframe timelines.
Developer creates a standalone web app for visualizing tree data structures, originally used for teaching React concepts like prop drilling.
A developer's build log for Ductts, a React Native app for tracking crying frequency, detailing the development process and challenges.
A tutorial on creating a per-letter faded text effect using a combination of CSS and a small amount of JavaScript for dynamic styling.
Learn how to use GitHub Copilot's #changes variable and other context tricks to analyze your git diffs and improve coding workflow.
Learn how to use personal instructions in GitHub Copilot Chat to customize its responses, tone, and code output for a better developer experience.
Explores how developers must now design tools for both human users and AI agents, discussing the rise of AI experience (AIEx) alongside developer experience (DevEx).
A developer's journey to create custom Open Graph images for their Astro blog using Puppeteer and SVG templates.
