Frontend Case Studies

Go beyond basic tutorials. Explore real-world frontend challenges and learn industry best practices.

Companies: 174
Case Studies: 1034
Period Covered: 2010–2025

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2025 24 case studies

How we migrated our Rush.js monorepo to Node type stripping Calm
August 2025
Breaking the Translation Bottleneck: How AI-Powered i18n Transformed Our Development Workflow Wingify
August 2025
Why Scaling TypeScript Became a Necessity at Datadog Datadog
July 2025
VWO Editor: Seamless DOM Manipulations for React-based Websites Wingify
July 2025
4 Untranslatable Words Behind Patreon’s Internationalization Overhaul Patreon
July 2025
Remixing Shopify's Admin: How We Made It 30% Faster and AI-Ready Shopify
June 2025
How We Achieved 75% Faster Builds by Removing Barrel Files Atlassian
June 2025
Resilient Import Maps - Better Theme Development and Beyond Shopify
May 2025
How can modern tooling save mercedes-benz.io engineering time? Mercedes-Benz
May 2025
Design system annotations, part 1: How accessibility gets left out of components GitHub
May 2025
Design system annotations, part 2: Advanced methods of annotating components GitHub
May 2025
Mobile Bridge: Making WebViews Feel Native Shopify
April 2025
Migrating Grep from Create React App to Next.js Vercel
April 2025
Building a Product Tour in React Sentry
April 2025
Implementing typography at scale: the journey behind the screens Atlassian
April 2025
Formatting SQL in the Browser Using PEG Sentry
April 2025
Accelerating Large-Scale Test Migration with LLMs Airbnb
March 2025
Modern Image Formats at Discord: Supporting WebP and AVIF Discord
March 2025
How we evolve code: Notion’s “ratcheting” system using custom ESLint rules Notion
March 2025
How The New York Times systematically migrated from Enzyme into React Testing Library The New York Times
March 2025
How Preply improved INP on a Next.js application (without React Server Components and App Router) Preply
February 2025
Considerations for making a tree view component accessible GitHub
January 2025
Using AI to Script Code Modifications Calm
January 2025
Automated Accessibility Testing at Slack Slack
January 2025

2024 36 case studies

Designed for delight, built for performance: The journey of pragmatic drag and drop Atlassian
December 2024
Better Code Rendering Through Virtualization Sentry
December 2024
Adopting Bazel for Web at Scale Airbnb
November 2024
How Vercel adopted microfrontends Vercel
October 2024
Perfectly Fitting Text to Container in React Sentry
October 2024
Balancing Old Tricks with New Feats: AI-Powered Conversion From Enzyme to React Testing Library at Slack Slack
October 2024
React at Meta Connect 2024 Meta
October 2024
The Implementation Details of Preply’s Design System Visual Coverage (part II) Preply
September 2024
Migrating to Next.js: Inside a No-Downtime Architecture Overhaul (Part 1) Patreon
September 2024
Visual coverage: Why and How Preply Measures the Impact of the Design System (part I) Preply
September 2024
Preact or Svelte? An Embedded Widget Use Case Sentry
September 2024
Mutation-testing our JavaScript SDKs Sentry
August 2024
An approach to optimizing TypeScript type checking performance EdgeDB
August 2024
Shipping support for module script integrity in Chrome & Safari Shopify
August 2024
How Airbnb Smoothly Upgrades React Airbnb
July 2024
Introducing Argonaut: Part Seven. The future REA Group
July 2024
Introducing Argonaut: Part Six. Reflections REA Group
July 2024
Introducing Argonaut – Part Five. Resilience REA Group
July 2024
Introducing Argonaut – Part Four. The developer experience REA Group
July 2024
How we sped up Notion in the browser with WASM SQLite Notion
July 2024
Exploring the challenges in creating an accessible sortable list (drag-and-drop) GitHub
July 2024
INP — what is the new Core Web Vitals metric and how do we work with it at Allegro. Allegro
July 2024
Why Google Sheets ported its calculation worker from JavaScript to WasmGC Google
June 2024
Enhancing The New York Times Web Performance with React 18 The New York Times
June 2024
How we used esbuild to reduce our browser extension build times by 90% 1Password
May 2024
Rethinking Text Resizing on Web Airbnb
May 2024
Behind the scenes of Threads for web Meta
May 2024
The evolution of Figma’s mobile engine: Compiling away our custom programming language Figma
May 2024
Design Engineering at Vercel Vercel
March 2024
Performance Regression in a React App: Investigation and Remediation Strategies Hootsuite
March 2024
CHAOS: Yelp's Unified Framework for Server-Driven UI Yelp
March 2024
Two years of Next.js at Artsy: A Retrospective Artsy
March 2024
How we optimise front-end component reuse at the ABC Australian Broadcasting Corporation
February 2024
Introducing SafeTest: A Novel Approach to Front End Testing Netflix
February 2024
Embed multicolor icons using a single DOM element Allegro
January 2024
Communication for Custom Developer Tools Khan Academy
January 2024

2023 48 case studies

How we reduced CSS size and improved performance across GOV.UK GOV.UK
December 2023
How Discord Modernized MFA with WebAuthn Discord
December 2023
Building Custom Animations in the Workflow Builder Slack
December 2023
Introducing an Accessibility Linter for Marko: Shortening the Accessibility Testing Pipeline eBay
November 2023
How We Reduced Replay SDK Bundle Size by 35% Sentry
November 2023
Triangles at work: GPU rendering shapes and connectors in Confluence whiteboards Atlassian
November 2023
Revamping Dasher FAQ Hub Through Server-Driven Content and WebView DoorDash
October 2023
How We Rearchitected A/B Testing at LINE NEWS Line
October 2023
End-to-end tests retry strategies Trivago
September 2023
Building a ShopifyQL Code Editor Shopify
September 2023
Introducing Argonaut – Part Three. A deep dive into rendering a micro-frontend REA Group
September 2023
Introducing Argonaut – Part Two. A technical overview REA Group
September 2023
Introducing Argonaut – Part One. The micro-frontend platform for building web experiences at REA Group REA Group
September 2023
Design for canvas-based applications Lucidchart
August 2023
How does CSS Grid work with Height/Width, Margin and Padding? Mixpanel
August 2023
Signals With @grammarly/focal grammarly
August 2023
How we reduced the size of our JavaScript bundles by 33% Dropbox
August 2023
Rendering like Butter – a Confluence Whiteboards Story Atlassian
August 2023
How I made a Figma translation plugin with Vue.js after a couple of drinks Line
July 2023
Accessibility considerations behind code search and code view GitHub
July 2023
Measuring Session Replay Overhead Sentry
July 2023
How We Migrated Our Acceptance Tests to Use Synthetic Monitoring Datadog
June 2023
How We Made Gusto Page Loads 40% Faster Gusto
June 2023
Designing the Vercel virtual product tour Vercel
June 2023
Multiple Layers of Abstraction in Design Systems Spotify
May 2023
300ms Faster: Reducing Wikipedia's Total Blocking Time Wikimedia
May 2023
Improving Performance with HTTP Streaming Airbnb
May 2023
Investigating the impact of HTTP3 on network latency for search Dropbox
May 2023
TV Spatial Navigation Spotify
May 2023
Introduction to fp-ts – Part 2 REA Group
April 2023
Making Fetch Happen - Building a General-purpose Query & Render Scheduler Datadog
April 2023
How Edison is helping us build a faster, more powerful Dropbox on the web Dropbox
April 2023
Immutability and Its (Potential) Impact on Performance Hubspot
April 2023
Introduction to fp-ts – Part 1 REA Group
April 2023
How we reduced CI time by 35% with Nx Caching Sentry
March 2023
How Migrating from Vanilla Redux to Redux Toolkit Improved State Management in Shopify POS Shopify
March 2023
Supporting Passkeys in Shop's Authentication Flows Shopify
March 2023
How we are writing modern Javascript with AngularJs Wingify
March 2023
Lessons From Linguistics: i18n Best Practices for Front-End Developers Shopify
March 2023
Encore x Accessibility: A Balancing Act Spotify
March 2023
The Journey to Server Driven UI At Lyft Bikes and Scooters Lyft
March 2023
Gondola: an internal PaaS architecture for frontend app deployment Yelp
March 2023
Building a robust mobile to webview bridge with RxJS and Redux GoDaddy
March 2023
TypeScript magic Artsy
March 2023
How we built our multi-platform design system at Booking.com Booking.com
March 2023
Sentry’s Frontend Tests: Migrating from Enzyme to React Testing Library Sentry
February 2023
Saving 300k hours for teams with REA’s design system REA Group
January 2023
You might not need module federation: orchestrate your microfrontends at runtime with import maps Mercedes-Benz
January 2023

2022 61 case studies

Deploying CSS Logical Properties On Web Apps Proton
December 2022
How Our Frontend Teams Use CI/CD to Deliver Value to Customers Hubspot
December 2022
Accelerating Code Delivery By 97% With Yarn Workspaces LinkedIn
December 2022
Creating an accessible search experience with the QueryBuilder component GitHub
December 2022
Expanding our Front End Testing Frameworks The New York Times
December 2022
How We Made JavaScript Stack Traces Awesome Sentry
November 2022
Vanilla JS is not dead! Microfrontends without web performance issues. Allegro
November 2022
Building a Better Web - Part 1: A faster YouTube on web YouTube
October 2022
DRUIDS, the Design System that Powers Datadog Datadog
September 2022
From Development to Real Users: How to Create a Web Performance Story Spotify
September 2022
Playwright – The Rightful Heir Wingify
September 2022
How Wix Applied Multi-threading to Node.js and Cut Thousands of SSR Pods and Money Wix
September 2022
MemLab: An open source framework for finding JavaScript memory leaks Meta
September 2022
When life gives you lemons, write better error messages Wix
September 2022
Parallelizing Jest and Cypress.io Tests on CircleCI Artsy
September 2022
We’re using TTVC to measure performance on the web—and now you can too Dropbox
August 2022
DoorDash’s Lessons on Improving Performance on High-Traffic Web Pages DoorDash
August 2022
Fast Front-End Performance for Microsoft Bing Microsoft
August 2022
Hacking Around Safari's 7-day Cookie Limit Artsy
August 2022
How we made the Vercel Dashboard twice as fast Vercel
August 2022
3 Things We Learned When Switching to TypeScript Trivago
August 2022
A Trello feature froze, but engineering didn’t: How we fixed an unreproducible React bug Atlassian
July 2022
Launching Instagram Messaging on desktop Instagram
July 2022
Understanding the Performance Impact of Generated JavaScript Sentry
July 2022
Illuminating dark mode Figma
July 2022
Writing Emails Using React Yelp
July 2022
JavaScript SDK “Package Size is Massive” - So we reduced it by 29% Sentry
July 2022
How GoDaddy's Websites + Marketing service improved customer Core Web Vitals by 75% GoDaddy
July 2022
Colorful and accessible theming in Trello with CSS custom properties Atlassian
July 2022
Migrating from Styleguidist to Storybook Yelp
July 2022
How We Built Hydrogen: A React Framework for Building Custom Storefronts Shopify
June 2022
Airbnb’s Trip to Linaria Airbnb
June 2022
How we think about browsers GitHub
June 2022
Building Background Effects for Clips Slack
June 2022
Faster JavaScript Builds with Metro Airbnb
May 2022
Optimising BBC Online’s Code Splitting Strategy BBC
May 2022
Migrating millions of lines of code to TypeScript stripe
May 2022
WARP - A Web Application Rewrite Project Trivago
May 2022
GraphQL sessions: powering farfetch.com FARFETCH
May 2022
Real-Time Collaborative Text Editing grammarly
April 2022
Automated UI testing for Carousell Web Carousell
April 2022
Leveraging configurable components to scale LinkedIn's Profile experience LinkedIn
April 2022
Building a Common Web Library for Fast Implementations of Risk Frictions DoorDash
March 2022
Building a next-generation forms framework at LinkedIn LinkedIn
March 2022
Improving Web Page Performance at DoorDash Through Server-Side Rendering with Next.JS DoorDash
March 2022
Cypress - A worthy replacement for Protractor? Wingify
March 2022
Making Grammarly Feel Native On Every Website grammarly
March 2022
Part 1: How Grammarly Tackles Hidden Complexity in Front-End Applications grammarly
March 2022
Part 2: How Grammarly Tackles Hidden Complexity in Front-End Applications grammarly
March 2022
How we trimmed the Sentry JavaScript SDK file size by 20% Sentry
February 2022
How Datadog uses Datadog to gain visibility into the Datadog user experience Datadog
February 2022
Building a Marketing Engineering Platform using Next.js, Cloudflare, and Contentful DoorDash
February 2022
Server Side Rendering at Scale Yelp
February 2022
LINE has started to donate to Prettier - why companies should support OSS Line
February 2022
Running multiple versions of a stencil design system without conflicts Mercedes-Benz
February 2022
Why should we rewrite enzyme.js to react-testing-library and how to do that? Allegro
February 2022
Optimising Core Web Vitals at Carousell Carousell
February 2022
Using Context to Simplify a VERY Large React Form Artsy
February 2022
How Prime Video updates its app for more than 8,000 device types: the switch to WebAssembly increases stability, speed Amazon
January 2022
A story of how we migrated to pnpm <div>RIOTS
January 2022
Automated Chaos Testing on the Front-end Twitch
January 2022

2021 65 case studies

Sounds Web Next: a “persistent player” prototype for BBC Sounds BBC
December 2021
Branding for ABC Websites Australian Broadcasting Corporation
December 2021
Measuring Web Performance at Airbnb Airbnb
December 2021
Using Algorithms to Meet Accessibility Requirements for Color Contrast Twitch
November 2021
Rethink Modals Management in React eBay
November 2021
Understanding why our build got 15x slower with Webpack 5 Tines
November 2021
Improving Core Web Vitals on the Mail.ru home page resulted in an average 10% increase in conversion rates Mail.ru
November 2021
Solving the problem with NPM Link and React Hooks BBC
November 2021
Etsy’s Journey to TypeScript Etsy
November 2021
CLS at BuzzFeed — Part 1: Raising The Floor BuzzFeed
November 2021
CLS at BuzzFeed — Part 2: Getting Help From Real Users BuzzFeed
November 2021
CLS at BuzzFeed — Part 3: Dealing with the unpredictable BuzzFeed
November 2021
Mobius: Adopting JSX While Prioritizing User Experience Etsy
November 2021
Implementing CSP and Trusted Types debugging in Chrome DevTools Google
November 2021
How we refactored the search form UI component Allegro
October 2021
How we halved the publish size of modular AWS SDK for JavaScript clients Amazon
October 2021
Migrating the platform that powers ABC sites to TypeScript Australian Broadcasting Corporation
September 2021
Dark Mode for the Cloudflare Dashboard Cloudflare
September 2021
How We Build Micro Frontends With Lattice Netflix
September 2021
Evolution of web performance culture Allegro
September 2021
Handling Shadow DOM in Protractor Tests Wingify
September 2021
Guiding a monolith with a gentle touch: pairing codeowners and lint rules Twitch
September 2021
How to turn on TypeScript strict mode in specific files Allegro
September 2021
Introducing Embrace: A Framework for Building Declarative UIs grammarly
September 2021
We Turned Our Front-End Code Into a Component Library (and You Can, Too) Heap
September 2021
GraphQL at PayPal: An Adoption Story PayPal
September 2021
Migrating Notion's marketing site to Next.js Notion
August 2021
CSS Architecture and Performance in Micro Frontends Allegro
July 2021
Relay: Fetching data in parallel with multiple queries Tines
July 2021
Making API calls a seamless user experience Allegro
July 2021
Managing Focus Transitions in Slack Slack
July 2021
Migrating to webpack 5 to improve build time and reduce chunk sizes OYO
June 2021
A Deep Dive into Airbnb’s Server-Driven UI System Airbnb
June 2021
Improving Cumulative Layout Shift at Telegraph Media Group The Telegraph
June 2021
Measuring Web Performance Allegro
June 2021
Saying goodbye to emotion ezCater
June 2021
Introducing the Team Developing Web Front-end for LINE User Services Line
May 2021
Building a Faster Web Experience with the postTask Scheduler Airbnb
May 2021
How we use Web Components at GitHub GitHub
May 2021
Web Styling with ReactJS Line
April 2021
Speeding Ahead with a Systematic Approach to Web Performance Lyft
April 2021
Customization vs. Configuration in Evolving Design Systems Spotify
April 2021
Sizing Android WebView iframes with JavaScript Expedia Group
April 2021
Measure Core Web Vitals Score During Development REA Group
April 2021
Managing React State on DoorDash’s Item Modal Using the Class Pattern DoorDash
April 2021
Using backend factories during frontend testing Tines
April 2021
Designing Marketing Emails via predefined Modules in Salesforce Email Studio Trivago
April 2021
Accessing the Relay Store Without a Mutation Artsy
April 2021
Testing React Tracking with Jest and Enzyme Artsy
April 2021
Slow and Steady: Converting Sentry’s Entire Frontend to TypeScript Sentry
April 2021
DevTools architecture refresh: migrating DevTools to TypeScript Google
April 2021
Building the Future of Our Desktop Apps Spotify
April 2021
Analyzing Wikipedia's Search Performance Wikimedia
April 2021
How GitHub Actions renders large-scale logs GitHub
March 2021
How Wix improved website performance by evolving their infrastructure Wix
March 2021
Frontend at Lyft: An Overview Lyft
March 2021
How we built the DevTools Tooltips Microsoft
March 2021
A More Accessible Web The New York Times
February 2021
Native Scrolling in Salesforce mobile app Salesforce
February 2021
Hawkins: Diving into the Reasoning Behind our Design System Netflix
February 2021
Serving Multiple Websites and Business Logic From a Single Platform DoorDash
February 2021
Rethinking the Next-gen Analytics Web App at trivago Trivago
February 2021
Migrating Puppeteer to TypeScript Google
January 2021
Overcoming a false sense of security when using Flow types Khan Academy
January 2021
The fundamentals of web development at Revolut Revolut
January 2021

2020 113 case studies

Performance in Jira front-end: solving bundle duplicates with Webpack and yarn Atlassian
December 2020
How we built the GitHub globe GitHub
December 2020
Interface localisation: adapting text fields for RTL languages Bumble
December 2020
How Discord Implemented App-Wide Keyboard Navigation Discord
December 2020
Implementing Theming in DoorDash’s Design Language System DoorDash
December 2020
Inside Figma: a case study on strict null checks Figma
December 2020
Creating a React Analytics Logging Library: Part 2 Slack
December 2020
Performance in Jira front-end: using modern bundles to improve load time Atlassian
December 2020
Building a Bank with Next.js: How We Use Next.js at Monzo Monzo
December 2020
Changing Lanes: How Lyft is Migrating 100+ Frontend Microservices to Next.js Lyft
November 2020
The lessons learnt creating a design system for BBC Online BBC
November 2020
Exploring the Page Visibility API for Detecting Page Background State Trivago
November 2020
Performance in Jira front-end: the story of a single line of code Atlassian
November 2020
10 Insights from Adopting TypeScript at Scale Bloomberg
November 2020
How to debug cumulative layout shift by adding secret visuals to HotJar recordings Preply
November 2020
Creating a React Analytics Logging Library: Part 1 Slack
November 2020
Scaling TypeScript compilation Google
October 2020
GraphQL at Treebo Treebo
October 2020
How we built the Chrome DevTools WebAuthn tab Google
October 2020
Under the hood: Updating LinkedIn's UI LinkedIn
October 2020
How Facebook is bringing QUIC to billions Meta
October 2020
How focusing on web performance improved Tokopedia's click-through rate by 35% Tokopedia
October 2020
How Expedia.com Uses Accessibility Automation Expedia Group
October 2020
To Eleventy and Beyond Mozilla
October 2020
JQuery to React: How we rewrote the HelloSign Editor Dropbox
September 2020
Building the Caviar Web Experience Using Reusable React Components on the DoorDash Platform DoorDash
September 2020
How Goibibo's PWA improved conversions by 60% Goibibo
September 2020
How Mercado Libre optimized for Web Vitals (TBT/FID) Mercado Libre
September 2020
A Tiny road to Reason Tiny
September 2020
The Unsuspecting Beauty & Complexity of Web Forms Slack
September 2020
Things to Keep in Mind When Integrating a Map Feature to a Web App DoorDash
September 2020
How to move large-scale React UI-components codebase to TypeScript Bumble
September 2020
Multi-Variate Web Optimisation Using Linear Contextual Bandits Expedia Group
September 2020
To design and develop an interactive globe stripe
September 2020
Relay Pagination Containers Demystified Artsy
August 2020
Accessible BuzzFeed BuzzFeed
August 2020
Animating list reordering with React Hooks Financial Times
August 2020
React at 60fps: improving scrolling comments in Figma Figma
August 2020
ts-migrate: A Tool for Migrating to TypeScript at Scale Airbnb
August 2020
Using ESLint to improve your app’s performance Allegro
August 2020
How Micro Frontend Has Changed Our Team Dynamic PayPal
August 2020
Making Facebook.com accessible to as many people as possible Meta
July 2020
Choosing Quora’s GraphQL client Quora
July 2020
Debugging WebKit in Hybrid Mobile Apps Salesforce
July 2020
CSS-in-JS: An Investigation Expedia Group
July 2020
One less second for the page, one giant leap for the business FARFETCH
July 2020
Improving performance through better architecture Atlassian
June 2020
App shell UX with service workers and streams DEV
June 2020
Using Babel Transforms to Inject Analytics Code in React Native Apps Heap
June 2020
Differential Serving — Food for latest browsers Walmart Labs
June 2020
Why Infinite Red uses MobX-State-Tree instead of Redux Infinite Red
June 2020
LINE Securities: Page Stack revisited Line
June 2020
Using Webpack Module Federation to Create an App Shell Expedia Group
June 2020
Why we switched from Yarn to pnpm TakeShape
June 2020
Taming Webpackʼs content hashes Financial Times
June 2020
Sharing UI Components at an Enterprise Level PayPal
June 2020
A Tokopedia Mobile Web Performance Case Study Tokopedia
May 2020
LinkedIn’s approach to automated accessibility (A11y) testing LinkedIn
May 2020
How we created a dark UI for GitLab's Web IDE GitLab
May 2020
Wake Lock API case study: 300% increase in purchase intent indicators on BettyCrocker.com Betty Crocker
May 2020
Debugging embedded JavaScript in an Android app using Chrome DevTools Salesforce
May 2020
The Great CoffeeScript to Typescript Migration of 2017 Dropbox
May 2020
Rebuilding our tech stack for the new Facebook.com Meta
May 2020
Implementing a secure web-based proxy service for Discover Meta
May 2020
Open Sourcing Intervene SoundCloud
May 2020
How Slack changed the way it designs accessible frontend components Slack
May 2020
12 Tips to Improve Client Side Page Performance Expedia Group
April 2020
Continuously refactoring 100000 lines of code Tiny
April 2020
Designing a sustainable front-end toolset for FT.com Financial Times
April 2020
React Re-render Optimization Hootsuite
April 2020
Inbox: Powering our Front-End through a Data-Driven Model Hootsuite
April 2020
My Chart Will Go On: How we built our in-house Visualization library at Botify Botify
April 2020
A token of our affection - A field guide to USWDS 2 18F
April 2020
Our approach to CSS and how we chose it Tines
April 2020
Auto Effect Pattern with Redux and React Hooks eBay
April 2020
From 48k lines of code to 10—the story of GitHub’s JavaScript SDK GitHub
April 2020
Securing WebViews with Chrome Custom Tabs Plaid
April 2020
Turbocharging Walmart.com Walmart Labs
April 2020
Moving from reCAPTCHA to hCaptcha Cloudflare
April 2020
Front End Debugging — Tips on Resolving Issues Quickly so You Can Move on to Better Things eBay
April 2020
Developing in a Monorepo While Still Using Webpack Etsy
April 2020
Building dark mode on Stack Overflow Stack Overflow
March 2020
Migrating to React land: Gatsby Cloudflare
March 2020
Why videos on GOV.UK use the YouTube video player GOV.UK
March 2020
How we use OpenAPI / Swagger for the YNAB API YNAB
March 2020
LINE Developers site: From Middleman to VuePress Line
March 2020
The First Prettier Plugin For Twig is Here Trivago
March 2020
Creating the Microsoft Edge DevTools 3D View Microsoft
March 2020
Responsive Accessibility Guidelines at Expedia.com Expedia Group
February 2020
Why the GOV.UK Design System team changed the input type for numbers GOV.UK
February 2020
Collaboration needs a clean Slate Tiny
February 2020
The evolution of Ember at Intercom Intercom
February 2020
Counting Calories: How We Improved the Performance and Developer Experience of UberEats.com Uber
February 2020
Semantic Colors for Designers and Developers. The Theory: A Semantic Color System YNAB
February 2020
Semantic Colors for Designers and Developers. The Practice: Semantic Colors for Designers YNAB
February 2020
Semantic Colors for Designers and Developers. The Practice: Semantic Colors for Developers YNAB
February 2020
The Impact of Web Performance ALDO Group
February 2020
Yarn 1 vs Yarn 2 vs NPM Infinite Red
February 2020
A Day in the Life of a Frontend Product Engineer at Slack Slack
February 2020
Scaling React server-side rendering in Jira Cloud Atlassian
February 2020
The journey to fast production asset builds with Webpack Etsy
February 2020
trivago Magazine's Journey to Server-Side Rendering Trivago
January 2020
Speed By A Thousand Cuts eBay
January 2020
Schema Driven UIs Expedia Group
January 2020
How We Started Treating Frontend Performance as a Feature Hubspot
January 2020
Effortless Pagination with GraphQL and Relay? Really! Artsy
January 2020
A Tale of Brotli Compression Treebo
January 2020
File Upload with GraphQL, Apollo Server, Hapi 18+, and React Expedia Group
January 2020
To OT or CRDT, that is the question Tiny
January 2020
Improving Site Performance With Webpack Tree Shaking Coursera
January 2020
6 Lessons learned from optimizing the performance of a Node.js service Klarna
January 2020
Performance improvements in VWO SmartCode Wingify
January 2020
Web Applications: Analyzing Client-Side Performance Expedia Group
January 2020

2019 167 case studies

Measuring Long Tasks and First Input Delay Wikimedia
December 2019
Migrating a codebase to React 16: some takeaways Hootsuite
December 2019
Measuring Interaction Performance with FPS Data Expedia Group
December 2019
Reimagining Design Systems at Spotify Spotify
December 2019
Making Hundreds of Developers More Efficient by Creating a Frontend Platform Team Hubspot
December 2019
Migrating to WKWebView Expedia Group
December 2019
A (Small) Case for Function-Based React Components Expedia Group
December 2019
Migrating the Guardian website to React The Guardian
December 2019
Assembling Robust Web Chat Applications with JavaScript: An In-depth Guide Carousell
December 2019
Autofill on Browsers: A Deep Dive eBay
December 2019
Beyond Purple Twitch
December 2019
How We Implemented a Baseline Grid Using CSS The New York Times
November 2019
Organizing and Securing Third-Party CDN Assets at Yelp Yelp
November 2019
Architecting UI for Netflix Studio Technology Netflix
November 2019
Design Tokens beyond colors, typography, and spacing Bumble
November 2019
Performance of JavaScript optional chaining Allegro
November 2019
How Discord achieves native iOS performance with React Native Discord
November 2019
How GitLab Pages made our Sketch design handoffs easier and faster GitLab
November 2019
A complete implementation guide to Trusted Web Activity(TWA)- OYO Lite OYO
November 2019
Using an event-driven architecture to improve Jira Software responsiveness Atlassian
November 2019
What I’ve learned about accessibility in SPAs Pinafore
November 2019
Making instagram.com faster: Code size and execution optimizations (Part 4) Instagram
November 2019
Web Performance vs. User Engagement Expedia Group
October 2019
Building (And Re-Building) the Airbnb Design System Airbnb
October 2019
Scaling GraphQL at PayPal PayPal
October 2019
CSS is Hard and Other Things I Learned Working on the 2019 Artsy Vanguard Artsy
October 2019
From data to DOM: Building a text rendering pipeline for React Australian Broadcasting Corporation
October 2019
Gantry: Slack’s Fast-booting Frontend Framework Slack
October 2019
Want to Improve UI Performance? Start by Understanding Your User Shopify
October 2019
All Mixed Up: Isomorphic Sorting Gone Wrong Cloud Four
October 2019
Designing accessible color systems stripe
October 2019
Design Tooling at Scale Dropbox
October 2019
Making Instagram.com faster: Part 3 — cache first Instagram
October 2019
How we failed, then succeeded, at migrating to TypeScript Heap
October 2019
Why we chose ECharts for data visualizations GitLab
September 2019
LINE's Web-based services and technology. Isn't LINE an app developer? Line
September 2019
Techbytes: TypeScript – from “Assess” to “Use” Spotify
September 2019
Minimizing DOM Nodes for Performance Expedia Group
September 2019
Building Dark Mode on Desktop Slack
September 2019
How to upgrade hundreds of React components without breaking production Khan Academy
September 2019
Progressive Conversion of TypeScript Namespaces to Modules YNAB
September 2019
The joy and challenge of developing for KaiOS Pinafore
September 2019
Wikipedia's JavaScript initialisation on a budget Wikimedia
September 2019
Micro Frontends at BuzzFeed BuzzFeed
September 2019
An Angular Change Detection Challenge Lucidchart
September 2019
The Gradual Design System: How We Built Slack Kit Slack
September 2019
How to build a performance culture at scale FARFETCH
September 2019
Making Instagram.com faster: Part 2 Instagram
September 2019
How we built a component API for interactive data visualizations with Ember Intercom
September 2019
Page visibility and performance metrics Allegro
September 2019
Trim the Fat From Your Bundles Using Webpack Analyzer & React Lazy/Suspense Wix
September 2019
Service Workers at Slack: Our Quest for Faster Boot Times and Offline Support Slack
August 2019
Best Practices for Unit Testing in React Version 16 Uber
August 2019
A look at Trello: adopting GraphQL and Apollo in a legacy application Atlassian
August 2019
Delivering ReactJS applications at scale Walmart Labs
August 2019
How to build a plugin system on the web and also sleep well at night Figma
August 2019
10 lessons learned building SumUp’s design system SumUp
August 2019
Designing automated tests for React Mailchimp
August 2019
Investigating Discord’s React Memory Leak Discord
August 2019
How we learned to stop worrying and love GraphQL Revolut
August 2019
Making Instagram.com faster: Part 1 Instagram
August 2019
Using NetInfo API to Improve Algolia’s JavaScript Client Algolia
July 2019
Building a More Seamless Web Booking Flow for Uber Uber
July 2019
When a rewrite isn’t: rebuilding Slack on the desktop Slack
July 2019
Building the inspect measurement engine InVision
July 2019
Why We Open Sourced Our JavaScript Framework Salesforce
July 2019
Redux with Code-Splitting and Type Checking Dropbox
July 2019
Building Sentry: Source maps and their problems Sentry
July 2019
How using component-based design helps us build faster Twitter
July 2019
Reducing the Intercom Messenger bundle size by 65% Intercom
July 2019
web-scripts – creating NPM libraries in a snap at Spotify Spotify
July 2019
Bringing Rich Experiences to Memory-Constrained TV Devices Netflix
July 2019
The case against React snapshot testing ezCater
June 2019
Improving End-to-End Testing at Coursera using Puppeteer and Jest Coursera
June 2019
Hot button issue: Improving accessibility in the Messenger Intercom
June 2019
Delightful User Interfaces: Easter Eggs Netflix
June 2019
Bringing service workers to Google Search Google
June 2019
How and what front-end developers actually do at LINE? Line
June 2019
Tracking down slow event handlers with Event Timing Wikimedia
June 2019
Now or Never: Migrating 300k LOC from Flow to TypeScript at Quizlet Quizlet
June 2019
Internationalizing Your Software Part Three: Final Thoughts Lucidchart
June 2019
Performance perception: correlation to RUM metrics Wikimedia
June 2019
Adopting Typescript at Scale Airbnb
June 2019
Performance perception: the effect of late-loading banners Wikimedia
June 2019
Rebuilding Intercom’s homepage with a new CMS Intercom
June 2019
A Recipe for Designing Animations — Without Sacrificing Performance Google
June 2019
One year of Pinafore Pinafore
June 2019
Internationalizing Your Software Part Two: Handling Language Differences Lucidchart
May 2019
Performance perception: how satisfied are Wikipedia users? Wikimedia
May 2019
Server-Rendering Responsively Artsy
May 2019
WebAssembly at eBay: A Real-World Use Case eBay
May 2019
Identifying micro-frontends in our applications DAZN
May 2019
React Native Stability Monitoring Zynga
May 2019
Building Chrome Extension with ReactJs: Beginner’s Guide OYO
May 2019
Signed-Exchange: Solving the AMP URLs Display Problem OYO
May 2019
Playback on Web at SoundCloud SoundCloud
May 2019
A Conspiracy To Kill IE6 YouTube
May 2019
Building the New facebook.com with React, GraphQL and Relay Meta
April 2019
Improving third-party web performance at The Telegraph The Telegraph
April 2019
Delivering Consistent Animations with a Design System Library Intuit
April 2019
The Art of UI Skeletons Mozilla
April 2019
Contextual and Consistent Analytic Events in React Expedia Group
April 2019
Faster input events with Facebook’s first browser API contribution Meta
April 2019
GraphQL in real life The New York Times
April 2019
An Experiment with JSON Schema Carousell
April 2019
Internationalizing Your Software Part One: The Process Lucidchart
April 2019
Shipping ES6 in browsers without Polyfill OYO
April 2019
Jest: Our journey into performant unit tests DAZN
April 2019
(Right to Left (The Mirror World Spotify
April 2019
Orchestrating micro-frontends DAZN
April 2019
Redesigning Heap Without a Feature Branch Heap
April 2019
Evaluating Element Timing for Images Wikimedia
April 2019
Why Allegro Ads chose TypeScript Allegro
April 2019
Creating better examples with @exemplar/storybook GoDaddy
April 2019
Adopting a Micro-frontends architecture DAZN
April 2019
Accessibility lessons: dealing with a large amount of form inputs GOV.UK
April 2019
What is TypeScript? Artsy
April 2019
How We Used WebAssembly To Speed Up Our Web App By 20X fastq.bio
April 2019
Revisiting the rendering tier The Guardian
April 2019
Micro-frontends, the future of Frontend architectures DAZN
April 2019
Presenting babel-plugin-cloudinary Trivago
April 2019
Infinite Scroll’ing the right way Walmart Labs
April 2019
AMP for Email - Interactive and Dynamic Email Experiences at OYO OYO
March 2019
Building Spotify’s New Web Player Spotify
March 2019
Making Websites Work with Windows High Contrast Mode Khan Academy
March 2019
Optimizing a Page: Resource Hints, Critical CSS, and Webpack Expedia Group
March 2019
Using TypeScript to upgrade Ignite without losing my mind Infinite Red
March 2019
Bing and React on Amazon Tablets Microsoft
March 2019
React Native at Artsy, 3 years later Artsy
March 2019
Improving User Experience with AMP⚡- A Treebo Case Study Treebo
March 2019
Lessons learned when building product-agnostic reusable UI Components FARFETCH
March 2019
GraphQL: Intuit’s Path to ONE API System Intuit
March 2019
Migrating code from MediaWiki's ResourceLoader to Webpack Wikimedia
March 2019
The Chrome Dev Summit site: case study Google
March 2019
The Anatomy of an Editorial Feature Artsy
March 2019
Building a Dynamic UI System at Carousell (Part 3) Carousell
March 2019
Delightful ways to write reusable CSS using subclasses Insider Inc.
March 2019
Porting Scratch from Flash to JavaScript: Performance, Interoperability and Extensions Scratch
February 2019
Building a Dynamic UI System at Carousell (Part 2) Carousell
February 2019
Covering A/B tests with UI tests: how to avoid getting tangled up in your own code Bumble
February 2019
TurboTax Live’s Approach to a Gender-Neutral Design System Intuit
February 2019
To Play, or Not to Play #2 – Firefox blocks audible autoplay by default! Bitmovin
February 2019
Building a Dynamic UI System at Carousell (Part 1) Carousell
February 2019
The need for speed — 1: measuring today’s web performance FARFETCH
February 2019
The need for speed — 2: call for metrics FARFETCH
February 2019
TSLint in 2019 Palantir
February 2019
Profiling React Server-Side Rendering to Free the Node.js Event Loop Expedia Group
February 2019
Why we got rid of all our front-end and back-end engineers Insider Inc.
February 2019
React Native @ The Knot: A Designer’s Perspective The Knot Worldwide
February 2019
Building a modern carousel with CSS scroll snap, smooth scrolling, and pinch-zoom Pinafore
February 2019
Handling complexity in lambda functions DAZN
February 2019
React Native @ The Knot The Knot Worldwide
February 2019
Creating Your Own Apollo Cache for Perf and Profit Expedia Group
February 2019
Refactoring MDN macros with async, await, and Object.freeze() MDN
February 2019
Making Bandersnatch Netflix
February 2019
How we wrote our own Service Worker Tumblr
February 2019
From TSLint to ESLint, or How I Learned to Lint GraphQL Code Artsy
January 2019
A Year of Utility Classes Mud
January 2019
Benefits of gradual strong typing in JavaScript Tiny
January 2019
Garbage Collection in Redux Applications SoundCloud
January 2019
What you should know before making a service worker Lucidchart
January 2019
Why every new web app at PayPal starts with TypeScript PayPal
January 2019
We’re making Tumblr more accessible! Tumblr
January 2019
Tech Choices I Regret at Spectrum Spectrum
January 2019
GraphQL: Union vs. Interface Artsy
January 2019
Porting 30K lines of code from Flow to TypeScript MemSQL
January 2019
JavaScriptCore—10 Months Later Lucidchart
January 2019

2018 149 case studies

Thoughts on migrating to TypeScript Hootsuite
December 2018
Spotify Wrapped 2018 — Technical Case Study Spotify
December 2018
How to style different sites with one CSS collection Insider Inc.
December 2018
Modernizing the Web Playback UI Netflix
December 2018
Why performance matters Wikimedia
December 2018
GraphQL Stitching 101 Artsy
December 2018
A new approach to mocking GraphQL data: how we power React component tests and examples at Stripe stripe
December 2018
Our learnings from adopting GraphQL Netflix
December 2018
How I fell out of love with HOCs Gusto
December 2018
Testing MobX State Tree DAZN
December 2018
How Airbnb is Moving 10x Faster at Scale with GraphQL and Apollo Airbnb
December 2018
Building for everyone: How we made the Intercom Messenger accessible Intercom
December 2018
Generating multi-brand multi-platform icons with Sketch and a Node.js script: from the idea to the assets Sketch files Bumble
December 2018
Generating multi-brand multi-platform icons with Sketch and a Node.js script: the build script and the generation of the assets Bumble
December 2018
Scalable & lightweight web screenshots with SVG Checkbot
November 2018
Switch from Capybara Webkit to Chrome Artsy
November 2018
Keeping Artsy's dependencies up to date Artsy
November 2018
Optical alignment for frontend developers: why is it not the same as it is for designers Bumble
November 2018
Optical alignment for frontend developers: how can the process be automated Bumble
November 2018
Fast Google Fonts with Cloudflare Workers Cloudflare
November 2018
Scrolling the main document is better for performance, accessibility, and usability Pinafore
November 2018
How we use Storybook for documentation and code reviews Redmart
November 2018
Real URLs for AMP Cached Content Using Cloudflare Workers Cloudflare
November 2018
Delivering Meaning with Previews on Web Netflix
November 2018
ZoneTracker: Tracking JavaScript Performance with Zone.js Lucidchart
November 2018
From dark to light and back again 1Password
November 2018
A Netflix Web Performance Case Study Netflix
November 2018
Reduxful: Manage RESTful data with Redux GoDaddy
November 2018
GraphQL Server Design @ Medium Medium
November 2018
How we made Carousell’s mobile web experience 3x faster Carousell
October 2018
RedMart's experience with PWA Redmart
October 2018
Internationalization With React-Intl Calm
October 2018
GraphQL: A success story for PayPal Checkout PayPal
October 2018
Building fast and reliable web applications Trivago
October 2018
Webpack 3 to 4: Facing the known unknowns and unknown unknowns Coursera
October 2018
Midway: Walmart’s mocking journey… Walmart Labs
October 2018
Composing Components Australian Broadcasting Corporation
September 2018
How to manage your Design Tokens with Style Dictionary Bumble
September 2018
How Etsy Localizes Addresses Etsy
September 2018
Visualizing money: how we explained a complex financial product using animation Zajno
September 2018
Enhancing the Netflix UI Experience with HDR Netflix
September 2018
Re-approaching Color Lyft
September 2018
A framework for web performance Clearleft
September 2018
Migrating from Backbone.js to React.js without losing it Preply
September 2018
WebAssembly Load Times and Performance Unity
September 2018
Why & How Words With Friends Is Adopting React Native Zynga
September 2018
Taking off with Apollo Gusto
September 2018
How Discord Handles Two and Half Million Concurrent Voice Users using WebRTC Discord
September 2018
React Serverside rendering : build slicker apps with better SEO ranking The Telegraph
September 2018
Lazy Loading Images with IntersectionObserver Walmart Labs
September 2018
Removing jQuery from GitHub.com frontend GitHub
September 2018
Migrating from Underscore to Lodash Dropbox
September 2018
Scoping A/B Test Code in React Expedia Group
September 2018
TypeScript at Google Google
September 2018
Shift to Atomic CSS Wingify
August 2018
Modernizing Word Online’s UX platform Microsoft
August 2018
Searching and sorting text with diacritical marks in JavaScript Thread
August 2018
Eliminating Boilerplate and Increasing Reusability with Higher-Order Reducers GoDaddy
August 2018
WebAssembly is here! Unity
August 2018
Figma, faster 🏎 Figma
August 2018
Iconography for Treebo Treebo
August 2018
Demystifying Webpack 4 Split Chunks Plugin Wingify
August 2018
Pseudo Localization @ Netflix Netflix
August 2018
How Discord Maintains Performance While Adding Features Discord
August 2018
Primer on Front End Automation Walmart Labs
July 2018
Why Discord is Sticking with React Native Discord
July 2018
A one year PWA retrospective Pinterest
July 2018
Operationalizing Node.js for Server Side Rendering Airbnb
July 2018
Farewell, Google Maps in der Apotheke
July 2018
This one line of Javascript made FT.com 10 times slower Financial Times
July 2018
Building the Google Photos Web UI Google
July 2018
Design Systems at GitHub GitHub
July 2018
React Native: A retrospective from the mobile-engineering team at Udacity Udacity
July 2018
How We Ditched Redux for MobX Skillshare
July 2018
Brotli vs Gzip Compression. How we improved our latency by 37% OYO
June 2018
Melody - the sound of JavaScript for our Hotel Search Trivago
June 2018
JavaScript Usage by Industry npm
June 2018
Why we moved our graphQL server from Node.js to Golang Safety Culture
June 2018
Integration Testing with React and Enzyme eBay
June 2018
How we iterated and improved our frontend team culture GitLab
June 2018
Improving load time for 100 million websites Wix
June 2018
Mobile web performance: the importance of the device Wikimedia
June 2018
How to Actually Improve Type Safety with the TypeScript Strict Flags Lucidchart
June 2018
React Native at Airbnb Airbnb
June 2018
Designing a GraphQL API Shopify
June 2018
Pixels vs. Ems: Users DO Change Font Size Internet Archive
June 2018
Making Web Components Work, or: How We Learned to Stop Worrying and Love the DOM Mixpanel
June 2018
Lessons learned in 2 years with a JavaScript/React Monorepo Botify
June 2018
How to test accessibility of emails Campaign Monitor
June 2018
LINE Animation Sticker Checker on Web browser Line
June 2018
How do we design for an operations heavy product? Treebo
May 2018
Our journey in switching to native Unicode emoji GitLab
May 2018
To Yarn and Back (to npm) Again Mixmax
May 2018
An outbreak of Accessibility anti-patterns Financial Times
May 2018
Translating Dust templates to JSX Bumble
May 2018
What we learned from getting our autocomplete tested for accessibility GOV.UK
May 2018
Choosing (and using) Javascript static typing: how Mixmax Engineering adopted Flow Mixmax
May 2018
Is React Native podium-ready? Evil Martians
May 2018
Supporting React Native at Pinterest Pinterest
May 2018
Dealing with legacy code in React Thread
May 2018
Redux Middlewares — An approach to cancel redux actions Treebo
May 2018
The case of the eternal blur: a bug hunt horror novella Medium
May 2018
TypeScript at Google (TSConf 2018) Google
May 2018
Introducing: Figma to React Figma
April 2018
Extension:Popups (Page Previews) front-end tooling Wikimedia
April 2018
Designing very large (JavaScript) applications Google
April 2018
Making Accessibility an Integral Part of the Creative Workflow Intuit
April 2018
tota11y - an accessibility visualization toolkit Khan Academy
April 2018
Introducing Pinafore for Mastodon Pinafore
April 2018
A Big New Beautiful Future for the Web at Tumblr Tumblr
April 2018
Re-inventing npmjs.com npm
April 2018
mustache.js replaced with JavaScript template literals in Extension:Popups Wikimedia
April 2018
Automated Heatmap Verification E2E using Selenium and Canvas Wingify
April 2018
Floor map management system on web, with Leaflet Line
April 2018
2 Fast 2 Furious: migrating Medium’s codebase without slowing down Medium
March 2018
React Native, 2 years later Artsy
March 2018
How BBC Interactive Content Works Across AMP, Apps, And The Web BBC
March 2018
How we gradually migrated to TypeScript at Unsplash Unsplash
March 2018
Lighter than Lightweight: How We Built the Same App Twice with Preact and Glimmer.js LinkedIn
March 2018
Using srcset and sizes to make responsive HTML5 images Tumblr
March 2018
CSS in the Age of React: How We Traded the Cascade for Consistency Yelp
March 2018
How We Adopted CSS Grid at Scale ThomasNet
March 2018
How we’ve made GOV.UK Elements even more accessible GOV.UK
February 2018
How We Write Front-end Code Heap
February 2018
Painless Migration From Backbone to React/Redux Conductor
February 2018
JavaScriptCore – The Holy Grail of Cross Platform Lucidchart
February 2018
Modular, fast, small: how we built a server-rendered IDE repl.it
February 2018
Building Tinder Online Tinder
February 2018
Cypress: The future of end-to-end testing for web applications Quizlet
February 2018
Lessons learned refactoring Codesandbox.io from Redux to Cerebral CodeSandbox
February 2018
Shipping system fonts to GitHub.com GitHub
February 2018
How we made our page-load optimisations even faster Cloudflare
February 2018
Redux modules and code-splitting Twitter
February 2018
From zero to Cosmos: part 1 Bumble
February 2018
From zero to Cosmos: part 2 Bumble
February 2018
From zero to Cosmos: part 3 Bumble
February 2018
Improving Accessibility in Pivotal Tracker Pivotal Tracker
February 2018
Myntra’s Web UI Journey — AMP and PWA Myntra
January 2018
Tips for in-house teams in a free market software culture Financial Times
January 2018
How to use variable fonts in the real world Clearleft
January 2018
Easy code-splitting with grow-loader Line
January 2018
LINE MANGA: Smooth page transition with Page Stack Line
January 2018
Keep webpack Fast: A Field Guide for Better Build Performance Slack
January 2018
OYO on a User Experience Quest with AMP ⚡ OYO
January 2018
Server Rendering, Code Splitting, and Lazy Loading with React Router v4 Airbnb
January 2018
Measuring Wikipedia page load times Wikimedia
January 2018
How We React at Microsoft To-Do Microsoft
January 2018
Ember Timer Leaks: The Bad Apples in Your Test Infrastructure LinkedIn
January 2018
How to handle folder uploads in Angular 2+ Lucidchart
January 2018

2017 151 case studies

A Tinder Progressive Web App Performance Case Study Tinder
December 2017
trivago just made filtering faster and more accessible, but why and how? Trivago
December 2017
Integrating imperative APIs into a React application Netflix
December 2017
How GitLab switched to Headless Chrome for testing GitLab
December 2017
Behind the Scenes: Improving the React Repository Infrastructure Meta
December 2017
The Story of Making Wix Accessible Wix
December 2017
Beyond HTTPS eBay
December 2017
wsk: A Straightforward and Maintainable Build System from the Bloomberg Graphics Team Bloomberg
December 2017
Implementing Japanese Subtitles on Netflix Netflix
December 2017
Migrating Large Enterprise to NodeJS Walmart Labs
December 2017
The Glimmer Binary Experience LinkedIn
December 2017
Precisely observing structural page changes Mixmax
December 2017
React Performance Fixes on Airbnb Listing Pages Airbnb
December 2017
Handling 3rd-party JavaScript with Rollup: how and when to leave JS out of the bundle Mixmax
December 2017
Improving Document Preview Performance Dropbox
December 2017
A Pinterest Progressive Web App Performance Case Study Pinterest
November 2017
Why we've removed Inheritance/Extend from SASS & you should do the same! Wingify
November 2017
What happens when you visit ft.com? Financial Times
November 2017
Namespacing Actions for Redux Kickstarter
November 2017
Converting 600k lines to TypeScript in 72 hours Lucidchart
November 2017
Dropbox Paper: Emojis and Exformation Dropbox
November 2017
Migrating Angular 1.x apps to React — The Hybrid Way! Walmart Labs
November 2017
How we do Vue: one year later GitLab
November 2017
HTTP/2 is easy, just turn it on… BBC
November 2017
Speeding up without slowing down Financial Times
November 2017
How we adapted the Booking.com mobile site for the iPhone X notch. Booking.com
November 2017
Switching from Ava to Jest for TypeScript Infinite Red
November 2017
GraphQL @ Product Hunt Product Hunt
November 2017
Hot localisations update: part 1 Bumble
November 2017
Hot localisations update: part 2 Bumble
November 2017
The Future of Marko eBay
October 2017
Performance Signup in React & Transactional Apps with Redux Netflix
October 2017
Cutting Dev Time in Half With Invalid User Input Prevention Walmart Labs
October 2017
Sleek and Fast: Speeding Up your Fat Web Client LinkedIn
October 2017
Translating interfaces into almost fifty languages: Sketch Bumble
October 2017
Real-world Unit Testing with Meteor and Jest OK GROW!
October 2017
Introducing PayPal’s open-source cross-domain javascript suite PayPal
October 2017
Rebuilding slack.com Slack
October 2017
Building Browser Extensions At Scale grammarly
October 2017
Lessons from migrating a large codebase to React 16 Discord
October 2017
Migrating towards Yarn and Webpack Wingify
October 2017
Building a large-scale design system: How we created a design system for the U.S. government 18F
October 2017
Building Shopify mobile with native and web technology Shopify
September 2017
To Play, or Not to Play – New AutoPlay Policies for Safari 11 and Chrome 64 Bitmovin
September 2017
TypeScript at Lyft Lyft
September 2017
React 16: A look inside an API-compatible rewrite of our frontend UI library Meta
September 2017
Accessibility at trivago Trivago
September 2017
eBay’s Font Loading Strategy eBay
September 2017
Thinking in TypeScript Microsoft
September 2017
Optimizing Performance with Web Workers Salesforce
September 2017
A React And Preact Progressive Web App Performance Case Study: Treebo Treebo
September 2017
Localizing Slack Slack
September 2017
How I Convinced Our CTO to Switch From CoffeeScript to ES6 Aha!
September 2017
How Bitmovin Used React/Redux to Develop Its New Dashboard Bitmovin
September 2017
Flow and TypeScript Tumblr
September 2017
Reinventing cross-origin requests, without CORS PayPal
September 2017
Modernizing Force Artsy
September 2017
Safari’s new third party tracking rules, and enabling cross-domain data storage PayPal
August 2017
Making Artsy Editorial Accessible Artsy
August 2017
How to Run a Front-End Infrastructure Team NextRoll
August 2017
The Why and How of Google AMP at Condé Nast Condé Nast
August 2017
Building a design system for HealthCare.gov HealthCare.gov
August 2017
Going Global - a Localization Case Study at Cloudflare Cloudflare
August 2017
Building UI at Enterprise Scale with Web Components Electronic Arts
August 2017
Polymer @ YouTube YouTube
August 2017
Migrating To React + MobX While Shipping New Features Heap
August 2017
Beacons Wikimedia
August 2017
Javascript Modules, Circular Dependencies and React Hootsuite
August 2017
Static assets in an eventually consistent webapp deployment REA Group
August 2017
Elm In Production: 25,000 Lines Later Roompact
July 2017
Improving Web Performance to Mirror Engine Speed Algolia
July 2017
React without Redux: how we moved from Backbone to React without rewriting Mixmax
July 2017
Building a PWA in Argentina Garbarino
July 2017
Can't You Just Make It More like Bootstrap? Financial Times
July 2017
The Story of our Progressive Migration from Backbone to Vue.js Snipcart
July 2017
How Cars.com Developer Mac Heller-Ogden Convinced His Bosses to Adopt Node.js cars.com
July 2017
Javascript @ Uber Uber
July 2017
CSS done right - Post RTLCSS Trivago
July 2017
Why We Chose Typescript Reddit
June 2017
React, Relay and GraphQL: Under the Hood of The Times Website Redesign The New York Times
June 2017
Introducing BrowserView for Electron Figma
June 2017
Building m.uber: Engineering a High-Performance Web App for the Global Market Uber
June 2017
My Journey in a UI Project (aka front-end is the new back-end) REA Group
June 2017
Connect: behind the front-end experience stripe
June 2017
Rebuilding the Guest List Manager with React + MobX at The Knot The Knot Worldwide
June 2017
Migrating from Mocha to Jest Airbnb
June 2017
Using CORS policies to implement CSRF protection Mixmax
June 2017
Launching A Successful Redesign For 20 Million Students Quizlet
June 2017
Creating Query Components with Apollo Khan Academy
June 2017
WebAssembly cut Figma’s load time by 3x Figma
June 2017
Improving time-to-logo performance with preload links Wikimedia
June 2017
Building High-Quality JavaScript Tools Meta
June 2017
Introducing Bonsai: an open source Webpack analyzer Pinterest
June 2017
Building Forms Faster on Vets.gov The U.S. Digital Service
June 2017
Investigating a performance improvement Wikimedia
June 2017
Best Practices for Flow Typing React Components Coursera
June 2017
Reducing Image File Size at Etsy Etsy
May 2017
React @ Product Hunt Product Hunt
May 2017
Migrating to a Mobile Monorepo for React Native Khan Academy
May 2017
How 17 lines of code improved shopify.com loading by 50% Shopify
May 2017
YES, your site too can (and should) be accessible Financial Times
May 2017
Rebuilding Slack’s Emoji Picker in React Slack
May 2017
Third party libraries Flocktory
May 2017
Shop Talk podcast #264: React with Netflix Netflix
May 2017
HTTPS on Stack Overflow: The End of a Long Road Stack Overflow
May 2017
The painless way to collect statistics from a web-site Bumble
May 2017
Pass the Remote: User Input on TV Devices Netflix
May 2017
Rearchitecting Airbnb’s Frontend Airbnb
May 2017
How we convinced everyone to care about technical performance Intercom
May 2017
Upgrading Ele.me to Progressive Web App Ele.me
May 2017
Delightful search: more than meets the eye Superhuman
May 2017
Building a UI Component in 2017 and Beyond eBay
May 2017
Investigating React Native Twitch
April 2017
React Theme Management in Less with Javascript Hootsuite
April 2017
Yarn-ifying Mixmax: why and how we moved from npm to Yarn Mixmax
April 2017
How We Built r/Place Reddit
April 2017
The Twitter Lite team about their use of Node.js Twitter
April 2017
TypeScript at Slack Slack
April 2017
Twitter Lite and High Performance React Progressive Web Apps at Scale Twitter
April 2017
Using Angular 2 Components In a Non-Angular App Lucidchart
April 2017
Infinite List and React Twitter
April 2017
Deploying Brotli for static content Dropbox
April 2017
How we built Twitter Lite Twitter
April 2017
The Coffee Threshold for Javascript Compilation Hootsuite
April 2017
Deminifying JavaScript call stacks Microsoft
March 2017
Implementing system fonts on Booking.com — A lesson learned. Booking.com
March 2017
ARIA Grid: Supporting nonvisual layout and keyboard traversal Meta
March 2017
Powering UberEATS with React Native and Uber Engineering Uber
March 2017
Less is more: reducing thousands of PayPal buttons into a single iframe, using zoid PayPal
March 2017
Preventing cross-site attacks using same-site cookies Dropbox
March 2017
Performance gains from switching to Closure Compiler Microsoft
March 2017
Improving Communication and Confidence with Visual Snapshot Testing Klarna
March 2017
How to teach a web app to speak 100 languages: the specifics of localisation Bumble
March 2017
Reducing Slack’s memory footprint Slack
March 2017
Effective Front-End Code Review eBay
March 2017
How to create content that works well with screen readers GOV.UK
February 2017
React Native at Instagram Instagram
February 2017
Our big Frontend plan revealed GitLab
February 2017
Exploration: Front-end JavaScript at Artsy in 2017 Artsy
February 2017
Using Elm in Production at Pivotal Tracker Pivotal Tracker
January 2017
This browser tweak saved 60% of requests to Facebook Meta
January 2017
Optimizing Meta Descriptions, H1s and Title Tags: Lessons from Multivariate SEO Testing at Etsy Etsy
January 2017
Refactoring 30000 lines of JS with types Reaktor
January 2017
Infinite Loops repl.it
January 2017
Netflix's approach to ES6 feature detection Netflix
January 2017
GitHub's post-CSP journey GitHub
January 2017
Crafting a high-performance TV user interface using React Netflix
January 2017
How removing caching improved mobile performance by 25% Klarna
January 2017
Scaling product design with Blueprint Palantir
January 2017
Building the F8 App with React Native Meta
January 2017
View Source: Twitter.com Twitter
January 2017

2016 93 case studies

Better video previews for email Campaign Monitor
December 2016
React Native at WalmartLabs Walmart Labs
December 2016
What we learnt from our mistakes in 2016 The Guardian
December 2016
How Bloomberg Used React Native to Develop its new Consumer App Bloomberg
December 2016
Breaking Up Our JavaScript Monolith with Rapidos Coursera
December 2016
Patterns for accessible webchats GOV.UK
December 2016
Why We Chose Vue.js GitLab
December 2016
Annotations on Document Previews Dropbox
November 2016
How we switched our template rendering engine to React Pinterest
November 2016
Redux-Doghouse: Creating reusable React-Redux components through scoping Datadog
November 2016
Building a Cross Platform 360-degree Video Experience at nytimes The New York Times
November 2016
Fixing bugs with Outlook specific CSS Campaign Monitor
November 2016
Angular 2 and Observables: Data Sharing in a Multi-View Application Lucidchart
November 2016
Debugging Data Corruption with Emscripten Figma
November 2016
How Elm made our work better Futurice
November 2016
JSON Web Tokens: Artsy's Journey Artsy
October 2016
SEO Title Tag Optimization at Etsy: Experimental Design and Causal Inference Etsy
October 2016
Functions as Child Components and Higher Order Components REA Group
October 2016
Accessibility for developers: building a frontend that everyone can use GOV.UK
October 2016
Step-by-Step VRT with Mugshot Hootsuite
October 2016
Building a React Native App for 80 Million Users Wix
October 2016
Designing React components is easier with Cosmos Hootsuite
September 2016
Simple Style Sheets, Or How to Improve Your Sleep by Dropping the Cascade Medium
September 2016
Improving Angular 2 Load Times and a 29KB Hello World App Lucidchart
September 2016
React Performance Tune-Up InVision
September 2016
Migrating Pinterest profiles to React Pinterest
September 2016
Experience the Lightning Bolt eBay
September 2016
Speeding Up VWO Wingify
September 2016
ReactJS Performance Debugging (aka The Magic of Reselect Selectors) REA Group
September 2016
Helping the Web Towards OSS by Default Artsy
September 2016
An Inline SVG Icon System For Our Hotel Search Application Trivago
September 2016
Resizing React Components Hootsuite
August 2016
Faster Paint Times Quora
August 2016
Singletons Suck (aka Flux to Redux) REA Group
August 2016
React Native at Artsy Artsy
August 2016
How ESLint Saved Our Soul InVision
August 2016
The Tech Behind Live Auction Integration Artsy
August 2016
Improving Chat Rendering Performance Twitch
August 2016
React Native at SoundCloud SoundCloud
August 2016
Making WSJ.com more accessible The Wall Street Journal
August 2016
How to Create a Style Guide: Start with a UI Framework NextRoll
July 2016
Redefining the BBC News core experience BBC
July 2016
Udacity’s Front-End Tech Stack Udacity
July 2016
Why our website is faster than yours De Voorhoede
July 2016
Where does Redux fit in Meteor? OK GROW!
July 2016
Fixing HTML Video on Mobile This Also
July 2016
Taking CSS To Scale: A Pragmatic Approach Wix
July 2016
Evolving JavaScript Part 1: Goodbye Backbone Gusto
July 2016
Evolving JavaScript Part 2: Hello React Gusto
July 2016
Evolving JavaScript Part 3: Building a React Application Gusto
July 2016
Getting to Slack faster with incremental boot Slack
July 2016
Browse eBay with Style and Speed eBay
June 2016
Designing Global Application State for Functional Frontends Hootsuite
June 2016
Thoughts on Atom Building in the Pattern Library Trivago
June 2016
Improving CSS quality at Facebook and beyond Meta
June 2016
Scaling Front-end Architecture Gusto
June 2016
Open Sourcing CloudFlare’s UI Framework Cloudflare
June 2016
Using React Native: One Year Later Discord
June 2016
Dropping IE8 Support: Consequences for JavaScript Trivago
June 2016
Testing Our Shared ESLint Configs InVision
May 2016
Enabling HTTP/2 for Dropbox web services: experiences and observations Dropbox
May 2016
How we built Origin CA: Web Crypto Cloudflare
May 2016
ReactJS – Real World Examples of Higher-Order Components REA Group
May 2016
The Road to Webpack Tumblr
April 2016
Turbocharged JavaScript Refactoring with Codemods Airbnb
April 2016
Persist Redux State by Using Sagas InVision
April 2016
Introducing yakbak: Record and playback HTTP interactions in NodeJS Flickr
April 2016
Progressive Web Apps with Service Workers Booking.com
April 2016
How Etsy Formats Currency Etsy
April 2016
GitHub's CSP journey GitHub
April 2016
Optimizing Webpack for Faster React Builds InVision
April 2016
How a Fixed-Width Button Can Get Your Company Trending on Reddit for All the Wrong Reasons: A Front-End Developer Tale Udacity
April 2016
Sharing ESLint Across Teams InVision
April 2016
A faster FT.com Financial Times
April 2016
A layout trick Wingify
April 2016
Dependency injection in Angular isn’t worth it. More lessons learned from scaling PayPal Checkout PayPal
April 2016
Developing the Draft U.S. Web Design Standards’ UI components 18F
April 2016
The new AdWords UI uses Dart — we asked why Google
March 2016
Building the UI for the new The Times website The Times & The Sunday Times
March 2016
Inline CSS at Khan Academy: Aphrodite Khan Academy
March 2016
Using React and jQuery Together Oyster
March 2016
React.js for TV UIs Netflix
March 2016
The Path to JavaScript Next eBay
March 2016
Managing Frontend in the Microservices Architecture Allegro
March 2016
Trellisheets: How we spin up CSS for Trello sites with ease Atlassian
March 2016
Moving things out of critical rendering path Tumblr
February 2016
Smooth Game Animations in React Quizlet
February 2016
Auto-shrink-wrapping in PayPal Checkout, and how it’s saved us more than once PayPal
February 2016
Large Scale CSS Refactoring at trivago Trivago
February 2016
Automated visual checking of deployments with ImageMagick REA Group
January 2016
Bringing a Modern Javascript Build Pipeline to LinkedIn LinkedIn
January 2016
6 Steps to i18n Success for Your Web App Coursera
January 2016
Packaging for Performance eBay
January 2016

2015 60 case studies

gulp-react-docs: From propTypes to Markdown in 3 seconds NextRoll
December 2015
Speeding up webpack performance with parallel builds Trivago
December 2015
Building a professional design tool on the web Figma
December 2015
The Unluckiest Paragraphs: A Tale of CSS and Why Parts of Medium Sometimes Disappear Medium
December 2015
SVG icons are easy but the fallbacks aren't Financial Times
December 2015
Forgo JS packaging? Not so fast Khan Academy
November 2015
Rollup: What we have learned from sharing UI code at AdRoll NextRoll
November 2015
Rollup: How we use React.js and npm to share UI code at AdRoll NextRoll
November 2015
Building Flipkart Lite: A Progressive Web App Flipkart
November 2015
Rollup: Shared UI components at AdRoll NextRoll
November 2015
How we built ‘instant’ autocomplete for Mixmax Mixmax
November 2015
How Our CSS Framework Helps Enforce Accessibility eBay
November 2015
Painless JavaScript testing? Surely you Jest! REA Group
October 2015
Schrödinger's deploys no more: how we update translations Khan Academy
October 2015
Goodbye CoffeeScript, Hello TypeScript Heap
October 2015
Enhancing Hootsuite with React and Flux Hootsuite
October 2015
How to Migrate React to Isomorphic Rendering Coursera
October 2015
i18nize-templates: Internationalization After the Fact Khan Academy
September 2015
Sane, scalable Angular apps are tricky, but not impossible. Lessons learned from PayPal Checkout PayPal
September 2015
Perceptual Image Compression at Flickr Flickr
September 2015
[CSP] Third Party Integrations and Privilege Separation Dropbox
September 2015
[CSP] The Unexpected Eval Dropbox
September 2015
[CSP] Unsafe-inline and nonce deployment Dropbox
September 2015
[CSP] On Reporting and Filtering Dropbox
September 2015
Responsive email Booking.com
September 2015
Migrating from Iron Router to FlowRouter (with Blaze) OK GROW!
September 2015
Copy-pasting more than just text Khan Academy
August 2015
Free-market software development Financial Times
August 2015
Why and How Coursera Does Isomorphic Javascript: A Fast and Snappy Quiz Coursera
August 2015
The technology behind preview photos Meta
August 2015
Fun with slope fields, css and react Khan Academy
August 2015
Making Netflix.com Faster Netflix
August 2015
Improving Coursera Global Site Performance: A Head to Head CDN Battle with Production Traffic Coursera
July 2015
Playing with Flux REA Group
July 2015
Five Goofy Things Medium Did That Break Accessibility Medium
June 2015
Babel in Khan Academy's i18n Toolchain Khan Academy
June 2015
Localization Technologies at Netflix Netflix
June 2015
Risk-free Migration From Assetic to Webpack Trivago
May 2015
Browser Monitoring for GitHub.com GitHub
May 2015
Big content in a little canvas Lucidchart
May 2015
Mobile First - A Retrospective eBay
May 2015
Rapidash: Faster frontend development Coursera
May 2015
Scaling Mixmax: Front-end performance Mixmax
May 2015
Designing for RTL platforms - A flipped layout Trivago
April 2015
Angular The Hard Way #1 Organise and manage domain data Redmart
April 2015
Mobile Photo Uploads with HTML5 Hootsuite
April 2015
Straightening our Backbone: A lesson in event-driven UI development Mixpanel
April 2015
JSON Graph: Reactive REST at Netflix Netflix
April 2015
Source Maps are Great … When You Get It Right Coursera
March 2015
Making Pinterest HTTPS Pinterest
March 2015
Testing AngularJS Apps End to End Using Protractor Wingify
February 2015
60 FPS on the mobile web Flipboard
February 2015
Rebuilding the Foundation of Etsy’s Seller Tools Etsy
February 2015
How we made JavaScript testing 15x faster Pinterest
February 2015
Transitioning to SCSS at Scale Etsy
February 2015
The curious case of the disappearing Polish S Medium
February 2015
Overcoming the Challenges of Performance Testing Single-page Apps Wingify
January 2015
Demystifying SEO with experiments Pinterest
January 2015
Wait, Don’t Touch That! Mutual Exclusion Locks & JavaScript Medium
January 2015
The Power of Perceived Performance eBay
January 2015

2014 24 case studies

Async Fragments: Rediscovering Progressive HTML Rendering with Marko eBay
December 2014
The Definitive Guide to Copying and Pasting in JavaScript Lucidchart
December 2014
Node.js in Flames Netflix
November 2014
Efficient Front-end Development at Coursera Coursera
November 2014
Don't Build Pages, Build Modules eBay
October 2014
How GitHub is using Web Components in production GitHub
September 2014
CSS at Hootsuite Hootsuite
August 2014
GitHub's CSS GitHub
July 2014
GridList — building responsive dashboards with resizable widgets Hootsuite
July 2014
Improving Article Accessibility The New York Times
June 2014
Improving the performance of our JavaScript inheritance model Netflix
May 2014
Why ContentEditable is Terrible Medium
May 2014
Automating CSS Sprites for Large Organisations Booking.com
May 2014
Building Flickr’s new Hybrid Signed-Out Homepage Flickr
April 2014
Solving the double-click in Backbone.js Gusto
April 2014
Why Using RequireJS As-Is Could Hurt Your Web Performance Hootsuite
March 2014
Layout in Flipboard for Web and Windows Flipboard
March 2014
Responsive emails that really work Etsy
March 2014
Yet Another Responsive vs. Adaptive Story eBay
March 2014
Smooth image loading by upscaling SoundCloud
February 2014
Atomic CSS as a tool set Lucidchart
January 2014
Custom Browser Extensions for Front End Developers Booking.com
January 2014
Front-end Renaissance at eBay eBay
January 2014
The Technology Behind the NYTimes.com Redesign The New York Times
January 2014

2013 17 case studies

Facebook has 30,000 react components. How do you manage large project directories with many components? Meta
December 2013
Rendering on the Server and Client in Node.js Artsy
November 2013
Building the New Netflix Experience for TV Netflix
November 2013
Lazy loading Backbone collections with Promises NextRoll
November 2013
Whoa! That Embedded Web View Looks Hot in Your iOS App! Yelp
November 2013
HTML5 Video Playback UI Netflix
October 2013
Functional testing with CasperJS Hootsuite
August 2013
Are you responsive to your users? REA Group
July 2013
Getting 60 FPS using Chrome devtools Wingify
July 2013
How We Made The Animated A/B Testing Guide Wingify
July 2013
jQuery Promises: The answer to PostMessage's asynchrony Wingify
June 2013
Gone In 60 Frames Per Second: A Pinterest Paint Performance Case Study Pinterest
June 2013
Adventures in Jank Busting: Parallax, performance, and the new Flickr Home Page Flickr
June 2013
Building The New Financial Times Web App Financial Times
May 2013
HubSpot's approach to front-end development: Part 2 Hubspot
April 2013
HubSpot's Approach to Front-End Development at Scale Hubspot
March 2013
Early Detection of Frontend Single Points of Failure eBay
January 2013

2012 15 case studies

Page Weight Matters YouTube
December 2012
Measuring Front-end Performance With Real Users Etsy
November 2012
IE10: How does it really stack up? Lucidchart
November 2012
Loading Google Maps with RequireJS REA Group
October 2012
Bandwidth-based Experience eBay
October 2012
Dropbox dives into CoffeeScript Dropbox
September 2012
Some love for JavaScript applications Dropbox
August 2012
Page Loading and Rendering Optimizations eBay
June 2012
Building The Next SoundCloud SoundCloud
June 2012
Parsing Exif client-side using JavaScript Flickr
June 2012
Building The Flickr Web Uploadr: The Grid Flickr
May 2012
Raising the bar on web uploads Flickr
April 2012
Building an HTML5 Photo Editor Flickr
April 2012
Five JavaScript Tips for a Sleek User Experience eBay
April 2012
Creative Techniques for Loading Web Pages Faster Wikimedia
January 2012

2011 9 case studies

Multilingual User Generated Content and SEO Etsy
December 2011
Front-end JavaScript bug tracking SoundCloud
November 2011
Localizing Logically for a Global Marketplace Etsy
October 2011
The New eBay Motors Homepage is 2X Faster eBay
October 2011
Creating an interface for geofences Flickr
September 2011
Oyster Shots on the Front End Oyster
July 2011
Lessons Learned from the Flickr Touch Lightbox Flickr
July 2011
Data URI Sprites eBay
July 2011
Translating Dropbox Dropbox
April 2011

2010 2 case studies

Best Javascript Charting Libraries Mixpanel
September 2010
BigPipe: Pipelining web pages for high performance Meta
June 2010