Skip to main content
{/}codefunc
← All articles

Guides

Practical how-to articles for everyday frontend development tasks.

Step-by-step guides for tasks you hit every week — formatting API payloads, tuning meta tags, and avoiding pitfalls that waste debugging time.

Each article pairs explanation with a free codefunc tool you can run locally. Read the approach, try it immediately.

Topics covered

  • JSON formatting and safe handling of API data
  • SEO meta tags, Open Graph, and indexability
  • Practical workflows that connect docs to tools

Articles

42
Guides

Word and Character Counts for UI Copy, SEO, and Reviews

How to count words and characters the way products and platforms do — limits, diffs, Markdown pitfalls, and a practical editing workflow for developers who ship copy.

Aug 6, 20266 minRead
Guides

Case Conventions for Developers: camelCase, snake_case, kebab-case, and More

A practical guide to naming conventions across JavaScript, APIs, CSS, and URLs — plus how to convert cases safely without breaking acronyms or slugs.

Aug 5, 20265 minRead
Guides

Lorem Ipsum and Placeholder Content: Design Without Fake Meaning

How to use Lorem Ipsum, fake user data, and Markdown fixtures effectively — when placeholder text helps layouts, when it hides product problems, and how to generate it locally.

Aug 3, 20266 minRead
Guides

XPath and CSS Selectors: Test Expressions Before They Hit Production

When to use XPath vs CSS selectors, how to write stable queries, and a browser-side workflow for testing against real HTML without shipping brittle scrapers.

Jul 31, 20265 minRead
Guides

XML Formatting for Developers: Readability, Namespaces, and Safe Edits

How to format and inspect XML without breaking namespaces, attributes, or mixed content — plus when to beautify vs minify and how XPath fits the workflow.

Jul 30, 20266 minRead
Guides

CSV and JSON Data Interchange: Round-Trips Without Silent Corruption

How to convert between CSV and JSON safely — quoting, nested objects, type coercion, headers, and a workflow that catches breakage before it hits production.

Jul 29, 20266 minRead
Guides

SQL Formatting for Readable Queries: Reviews, Dialects, and Migration Safety

How to format SQL for code review clarity, where dialects disagree, and when you should not reformat production migrations or generated queries.

Jul 26, 20265 minRead
Guides

QR Codes for Developers: URLs, Wi‑Fi, OTP Enrollment, and SVG Output

How to use QR codes in product flows — URL and Wi‑Fi payloads, otpauth enrollment, error correction levels, and when SVG beats raster for crisp rendering.

Jul 25, 20265 minRead
Guides

Markdown and HTML Workflows: GFM Preview, Round-Trips, and When to Beautify

A practical GFM workflow for developers — preview Markdown safely, convert HTML when needed, and understand the caveats of Markdown ↔ HTML round-trips.

Jul 24, 20265 minRead
Guides

Formatting GraphQL Queries for Readable Reviews and Playgrounds

Why compact GraphQL queries hurt reviews, how to format selection sets consistently, and a browser workflow before you paste into Apollo or GraphiQL.

Jul 23, 20262 minRead
Guides

JSONPath for API Debugging: Query Nested JSON Without Writing Loops

Use JSONPath to extract fields, filter arrays, and inspect nested API payloads — with practical expressions and a browser tester workflow.

Jul 23, 20262 minRead
Guides

SVG Optimization for Icons: Minify Markup and Embed as Data URLs

Shrink SVG icons for the web — strip comments and whitespace, choose inline vs data URLs, and know when you still need a full SVGO pipeline.

Jul 23, 20262 minRead
Guides

Unified Diffs and Patches: Create, Summarize, and Apply Changes Cleanly

How unified diffs work, when to use a patch viewer vs text/JSON diff, and a safe browser workflow for creating and applying single-file patches.

Jul 23, 20262 minRead
Guides

Favicons and PWA Icons in 2026: Sizes, Manifest, and theme-color

Ship the right favicon and apple-touch-icon sizes, wire Web App Manifest icons, set theme-color, and avoid the common gaps that leave tabs and home screens looking broken.

Jul 21, 20266 minRead
Guides

YAML vs TOML vs JSON: Choosing Config Formats Without the Footguns

When to use JSON, YAML, or TOML for app config — conversion pitfalls, trailing commas, multiline strings, and a safe workflow for editing and validating files.

Jul 19, 20266 minRead
Guides

Debugging Regular Expressions in Frontend JavaScript

Master JavaScript RegExp flags, avoid catastrophic backtracking, know when regex is the wrong parser, and build a live testing workflow that catches bugs before production.

Jul 17, 20266 minRead
Guides

Sitemap XML and Search Console: Structure, lastmod, and robots.txt Pairing

Build a correct sitemap.xml, keep lastmod honest, submit it in Google Search Console, and pair it with robots.txt so crawlers discover the pages you actually want indexed.

Jul 17, 20265 minRead
Guides

JSON Diff: Structural Comparison vs Text Diff for Config and Code Review

How to compare JSON structurally — key order, arrays, nested objects — and when to use JSON diff versus line-based text diff in config and API review workflows.

Jul 15, 20266 minRead
Guides

JSON Schema Validation: Contracts, Required Fields, and API Mistakes to Avoid

Learn JSON Schema basics — types, required properties, common API contract errors — and how to validate payloads in the browser before you commit or deploy.

Jul 14, 20266 minRead
Guides

Browser DevTools Mastery: Debugging, Profiling, and Network Analysis

A practical guide to Chrome DevTools for frontend developers — inspecting elements, debugging JavaScript, analyzing network requests, profiling performance, and workflows that save hours of debugging time.

Jul 7, 20269 minRead
Guides

CSS Architecture: Tailwind vs CSS Modules vs CSS-in-JS

A practical guide to CSS architecture patterns — when to use Tailwind for rapid development, CSS Modules for component scoping, or CSS-in-JS for dynamic styling.

Jul 7, 20267 minRead
Guides

Web Animations: Framer Motion and CSS for React Developers

A practical guide to animations in React — CSS transitions and keyframes, Framer Motion for complex interactions, performance optimization, and accessibility considerations.

Jul 7, 20267 minRead
GuidesFeatured

Frontend Authentication: OAuth 2.0, JWT, and Session Tokens Explained

A practical guide to authentication for frontend developers — understanding OAuth flows, JWT structure, session cookies, and implementing secure auth in React applications.

Jul 7, 20268 minRead
Guides

Frontend Security: XSS, CSRF, and Best Practices

A practical guide to frontend security — preventing cross-site scripting (XSS), cross-site request forgery (CSRF), securing authentication, and building defense in depth.

Jul 7, 20268 minRead
Guides

GraphQL for Frontend Developers: Queries, Mutations, and Caching

A practical guide to using GraphQL in frontend applications — writing queries and mutations, client-side caching with Apollo and urql, and patterns for React integration.

Jul 7, 20268 minRead
Guides

HTML Semantics: Document Structure That Helps Users, Search Engines, and Your Future Self

A practical guide to semantic HTML — landmarks, headings, lists, and sectioning elements that improve accessibility, SEO, and maintainability without extra frameworks.

Jul 7, 20269 minRead
Guides

Monorepos for Frontend: Turborepo, Nx, and Workspace Management

A practical guide to monorepo architecture — when to use monorepos, setting up Turborepo or Nx, shared packages, caching, and CI/CD optimization.

Jul 7, 20266 minRead
Guides

Next.js Caching and Data Fetching: The Four Cache Layers Explained

A practical guide to caching in Next.js 15+ — Request Memoization, Data Cache, Full Route Cache, and Router Cache demystified with patterns for static generation, ISR, and on-demand revalidation.

Jul 7, 20268 minRead
Guides

Playwright for E2E Testing: A Practical Guide for Frontend Developers

Learn end-to-end testing with Playwright — writing reliable tests, handling authentication, testing across browsers, and integrating with CI/CD pipelines.

Jul 7, 20267 minRead
Guides

Progressive Web Apps: Service Workers, Offline-First, and Installation

A practical guide to building Progressive Web Apps — service workers for offline support, web app manifest for installation, caching strategies, and turning your website into an installable app.

Jul 7, 20268 minRead
Guides

QA and Test Automation: Unit, Integration, and E2E Explained

A practical guide to the testing pyramid — what unit, integration, and end-to-end tests actually do, when to write each, and how to automate them in CI without slowing your team down.

Jul 7, 202612 minRead
Guides

React Hook Form + Zod: Modern Form Validation

A practical guide to building forms with React Hook Form and Zod — type-safe validation, error handling, complex form patterns, and integration with UI libraries.

Jul 7, 20268 minRead
Guides

Internationalization in React: i18n with react-i18next and Next.js

A practical guide to internationalizing React applications — setting up translations, handling plurals, formatting dates and numbers, and implementing language switching.

Jul 7, 20267 minRead
Guides

React State Management in 2026: Server State, Client State, and When to Use What

A practical guide to modern React state management — TanStack Query for server state, Zustand for client state, and patterns that replaced Redux for most applications.

Jul 7, 20268 minRead
Guides

TypeScript for Frontend Developers: Types That Catch Bugs Before Users Do

A practical introduction to TypeScript in frontend projects — type annotations, interfaces, generics, and the compiler settings that make React and API code safer without slowing you down.

Jul 7, 20269 minRead
Guides

Vite vs Webpack vs esbuild: Choosing the Right Build Tool in 2026

Vite vs webpack vs esbuild — a practical comparison of modern JavaScript build tools, when to use each, and what to pick for new projects in 2026.

Jul 7, 20266 minRead
GuidesFeatured

Web Accessibility in 2026: A Developer's Guide Beyond Color Contrast

Semantic HTML, keyboard navigation, focus management, ARIA, forms, and testing — a practical WCAG 2.2 checklist for frontend developers who want accessible products, not checkbox compliance.

Jul 7, 202611 minRead
Guides

Web Performance and Core Web Vitals: What to Measure and How to Fix It

A practical guide to frontend performance — LCP, INP, CLS explained, with optimization techniques for images, JavaScript, fonts, and rendering that improve both user experience and search rankings.

Jul 7, 20269 minRead
Guides

WebSockets and Real-Time Data: A Frontend Developer's Guide

Learn to implement real-time features with WebSockets and Server-Sent Events — chat apps, live notifications, collaborative editing, and handling connection state in React.

Jul 7, 20268 minRead
Guides

AI and SEO in 2026: How AI Helps (and Hurts) Getting Your Site Indexed

A practical guide to search indexing in the AI era — what crawlers still need, how LLMs surface content, and where AI tooling actually speeds up discoverability without spam penalties.

Jul 6, 20268 minRead
GuidesFeatured

How to Format and Validate JSON Safely in the Browser

The complete guide to prettifying, validating, repairing, and debugging JSON in production workflows — without leaking sensitive API data to remote servers.

Jul 5, 20268 minRead
GuidesFeatured

Meta Tags for SEO in 2026: What Still Matters and What to Skip

The definitive checklist for title tags, meta descriptions, Open Graph, Twitter cards, canonical URLs, and robots directives — with copy-paste examples for Next.js and static sites.

Jun 22, 20266 minRead

Search tools

Find a developer tool