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.
139 articles from this blog
A tutorial on creating a text-only carousel using pure CSS3, without JavaScript dependencies, for displaying rotating quotes.
An explanation of JavaScript closures, how they work, and their use for data privacy and creating private variables.
A technical guide on integrating the Mousetrap library to add custom keyboard shortcuts and the Konami Code to React components.
A developer documents their journey creating a Whitney Houston song API from scratch using Python, web scraping, and JSON.
A technical history of the PNG image format, from its early browser support issues to its current status as a dominant web format.
Explores the CSS Image Values spec, focusing on the image-rendering property for crisp pixel art scaling across browsers.
Advice on finding a tech mentor and being a good mentee, emphasizing relationship building and mutual respect.
A developer recounts their experience attending and helping organize the BattleHack Boston hackathon, praising the event's organization, food, and prizes.
A recap of the first HackISU hackathon at Iowa State, where 150 students built creative tech projects in 24 hours.
A computer science graduate shares advice on acing technical interviews, emphasizing thought process, storytelling, and the STAR method.
A computer science major debunks common stereotypes about the field, discussing work environments, gender diversity, and the creative problem-solving nature of CS.
A developer reflects on the power of positive feedback in tech, sharing personal stories about her tutorial's impact and mentorship initiatives.
A developer humorously shares their Valentine's Day plans: attending a 48-hour hackathon (PennApps) instead of traditional celebrations.
A beginner-friendly tutorial covering HTML basics, tag structure, text formatting, and essential web development concepts for absolute beginners.
Part 2 of an HTML and CSS tutorial for beginners, covering CSS basics, selectors, and styling techniques.
A beginner's guide to designing and building your first iPhone app, covering tools, planning, and learning resources.
A guide for college students on building professional networks, focusing on tech careers through LinkedIn, personal websites, clubs, and internships.
A student's experience at PennApps, the largest student hackathon, where they built a universal uploader app for SoundCloud.
A student recounts her experience attending the White House Tech Inclusion Summit, speaking about women in tech and computer science education.
