Frontend

React, performance, design systems & the modern web

EvergreenMar 17, 2026·14 min read

Build Connect Four from Scratch with Vanilla JS→

A complete guide to building Connect Four using only HTML, CSS, and vanilla JavaScript. Covers gravity-based piece dropping, win detection across rows/columns/diagonals, and AI opponent. Interview-ready implementation.

javascriptvanilla-jsinterviewsgamehtmlcss
EvergreenMar 17, 2026·12 min read

Build a Hierarchical Checkbox from Scratch with Vanilla JS→

A complete guide to building a hierarchical (tri-state) checkbox tree using only HTML, CSS, and vanilla JavaScript. Covers parent-child propagation, indeterminate state, dynamic trees, and accessibility. Interview-ready implementation.

javascriptvanilla-jsinterviewscomponenthtmlcssaccessibility
EvergreenMar 17, 2026·11 min read

JavaScript Promises — From Zero to Interview Ready→

A beginner-friendly deep dive into Promises. Understand the concept, master the API, and learn to implement custom Promise utilities that interviewers love to ask.

javascriptpromisesasyncinterview-prepbeginner
EvergreenMar 17, 2026·15 min read

Build Snake from Scratch with Vanilla JS→

A complete guide to building the classic Snake game using only HTML, CSS, and vanilla JavaScript. Covers game loops, collision detection, growing mechanics, and responsive canvas rendering. Interview-ready implementation.

javascriptvanilla-jsinterviewsgamecanvashtmlcss
EvergreenMar 17, 2026·11 min read

Build Tic-Tac-Toe from Scratch with Vanilla JS→

A step-by-step guide to building a complete Tic-Tac-Toe game using only HTML, CSS, and vanilla JavaScript. Covers game state management, win detection, and AI opponent — perfect for frontend interview prep.

javascriptvanilla-jsinterviewsgamehtmlcss
EvergreenMar 17, 2026·30 min read

Vanilla JS Game & Widget Tutorials for Frontend Interviews→

Build Tic-Tac-Toe, Connect Four, a Hierarchical Checkbox tree, and Snake from scratch using only HTML, CSS, and vanilla JavaScript. Complete, interview-ready implementations with thorough explanations.

javascriptvanilla-jsinterviewsgameshtmlcss
EvergreenMar 16, 2026·28 min read

CSS from Zero to Design Systems→

Everything you need to know about CSS — from selectors to layout to building your own component library. Written so a beginner can follow along and an interviewer will be impressed.

cssdesign-systemslayoutbeginnerinterview
EvergreenMar 16, 2026·8 min read

The DOM API — A Beginner-Friendly Guide→

Learn how the browser turns HTML into objects you can control with JavaScript. By the end, you'll build a working todo app from scratch.

javascriptdomhtmlbeginner
EvergreenMar 16, 2026·28 min read

Vanilla JS Components for Frontend Interviews→

Build production-quality UI components from scratch using only HTML, CSS, and vanilla JavaScript — image carousel, modal dialog, star rating, and more. Interview-ready implementations with accessibility.

javascriptvanilla-jsinterviewscomponentshtmlcss
SeedlingWIPMar 15, 2026·1 min read

React Server Components in Practice→

Moving beyond the theory — practical patterns, pitfalls, and performance wins with RSC in production apps.

reactrscnext.js