Jānis Smilga 🇱🇻 🇺🇦 #StandWithUkraine @codingaddict_lv
Web Developer • 🚀 Creator of https://t.co/ksVm1jofjS • Tweets about my dev journey johnsmilga.com Joined March 2018-
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🚀 New Course Launch! AWS CDK v2 with TypeScript Learn to define & deploy AWS infrastructure in code. Hands-on projects: S3, Lambda, API Gateway, DynamoDB, SQS, Cognito & more. Enroll now & build like a pro! udemy.com/course/aws-cdk… #AWS #CDK #TypeScript #CloudComputing
🚨 New Course Alert! 🚨 Practical Git and GitHub: From Basics to Pro Workflows ✅ Real-world Git commands ✅ VSCode + Terminal workflows ✅ Interactive rebase, cherry-pick & more 🎯 udemy.com/course/practic… 🎟 Code: GIT-GITHUB-COURSE ⏳ Offer ends June 11, 2025
🚨 New Course Alert! 🚨 Practical Git and GitHub: From Basics to Pro Workflows ✅ Hands-on Git commands ✅ Real-world workflows (merge, rebase, cherry-pick) ✅ Terminal + VSCode examples Perfect for devs who want to master Git without the fluff.
The limits of AI in programming | Tim Sweeney and Lex Fridman youtu.be/lR21C8cNx2o?si… via @YouTube
The more time I spend in production code, the more I realize how out of touch many YouTube coding influencers are. Their takes on “clean code,” “best practices,” and what it means to be a senior dev often crumble in the face of real-world constraints, and legacy systems 😂
🚀 New Course Alert! Master Jest Testing with TypeScript & Node.js Learn how to write clean, reliable tests with real-world examples. Unit tests, mocks, spies, error handling & more! 🎯 Enroll now → udemy.com/course/masteri…
Just installed webpack-bundle-analyzer — love the 🔥 graphical breakdown of my bundle! Makes spotting bloat so much easier 📊🕵️♂️ Not using Webpack? Check out source-map-explorer or vite-plugin-visualizer 💡 #webpack #webperf #javascript
Spicy take 🌶️: For all the talk about TypeScript "overcomplicating" things, it’s actually saving your team from chaos 😅
🔍 Want to see where a dependency is used in your project? Run this command: 👉 npm ls package-name It shows the full dependency tree 🌳 Super useful for tracking down nested dependencies 🕵️♂️ #npm #javascript #nodejs #webdev
Hot take 🔥 : in production, SourceTree ⏩ Git CLI. Look, I ❤️ terminal too, but when it’s time to rebase, merge, and cherry-pick in prod - most times clicking 🖱️ is faster than rewriting the same conflict 3 times—or summoning the Git gods with a ritual sacrifice. 🔥
Using a this hack in tests: 🔁 const resetSingleton = () => (HashingService as any).instance = undefined; 🔧 Calling this in beforeEach() to reset singleton state. 🕵️♂️ In general, (SomeClass as any) helps "cheat" TypeScript when tests need to bypass strict typing. #TypeScript#Jest
Spent an hour debugging a mysterious TypeScript error 😵💫 Turns out... .webpackCache was the culprit 🧨 Deleted it, and everything worked like magic ✨ #webpack #devlife #typescript 🛠️
🧠 TypeScript fun fact! 🧠 The declare keyword only provides type information but NO runtime values! declare enum Colors { RED, BLUE } console.log(Colors.RED) // 💥 Crash! Remove declare if you need actual values at runtime 😀
🔍 Dev Tip: Lookup Tables FTW! 📚 Ditch long if/switch statements—use object mapping instead! 🚀 Examples: ✅ Convert status codes to messages ✅ Map country codes to names ✅ Translate enums 💡 const result = lookupTable[input] || defaultValue; Fast, and easy to maintain! ⚡
🚀 Generate minimal .d.ts files with dts-bundle-generator 📦 npm install --save-dev dts-bundle-generator 📂 mkdir -p types (if missing) ⚡ npx dts-bundle-generator -o types/utils.d.ts src/utils.ts 🔍 Extracts only needed types & dependencies!
🧪 Jest Mocking Gotcha! 🔥 Issue: 👉 jest.mock('./myModule'); 🚨 Returns undefined for EVERYTHING! 🫥 ⚡ Your code: 👉 myModule.doStuff() 💥 Cannot read property 'doStuff' of undefined 🛠 Fix: jest.mock('./myModule', () => ({ doStuff: jest.fn() })); #JavaScript #Testing #Jest
🔍 Git tip: Deleted files not showing up in staging? git add -A The -A flag is your friend! It stages ALL changes: • New files ✨ • Modified files 📝 • Deleted files 🗑️ • Renamed files 🔄 No more ghost files in your staging area! 🎯 #Git #DevTips #CodingTips
🧪 Jest Testing Tip: Run single test file: 👉 "npm test -- yourFileName.spec.ts" OR directly with Jest: 👉 "jest -- yourFileName.spec.ts" Pro tip: Arrow ⬆️ key is your friend for finding recent commands! No config changes needed 🚀 #JavaScript #Testing
🔧 NVM #DevTip: VS Code terminal showing a different Node version than your system terminal? Add this to your .zshrc: 👉 "nvm use default" 🎯 Boom! Now both terminals stay in sync with your default Node version. No more version mismatches!
Need to search only in a specific folder in VS Code? - Press `Ctrl + Shift + F` (`Cmd + Shift + F` on Mac) - In **'files to include'**, type `src/components/**` - To exclude folders, use **'files to exclude'**, e.g., `node_modules/**` - Get focused search results! 🚀
Brad Traversy @traversymedia
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