Tech Tips.

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1. 9 August 20262 min read

   Native image lazy loading: one attribute, used well

   The loading attribute delays offscreen images until the user scrolls near them. It takes one word, but on the wrong image it makes a page slower. Where it belongs.

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2. 8 August 20262 min read

   Serverless cold starts: causes and fixes

   The first request to an idle serverless function is slow because the platform has to start it. What happens during a cold start and six ways to shorten or avoid it.

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3. 2 August 20262 min read

   Keep API keys out of your frontend and your repo

   An API key in frontend code or a Git commit is a public key. Where secrets belong, how a backend proxy protects them, and what to do the moment one leaks.

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4. 1 August 20262 min read

   JavaScript performance: keep the main thread free

   A page can load fast and still feel slow. Batch DOM updates, debounce noisy events and break up long tasks to keep the interface responsive.

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5. 30 July 20262 min read

   CSS container queries: components that fit their space

   Media queries ask how wide the screen is. Container queries ask how wide the component's own box is, so one card works in a sidebar, a grid or a full-width row.

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6. 30 July 20262 min read

   Environment variables in Node.js and Vite

   Hard-coded URLs and keys make an app fragile and unsafe. How .env files work in Node.js and Vite, which values reach the browser, and how to validate them at startup.

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