In-depth, field-tested articles on web performance, security, accessibility, and cloud architecture — written by Alex I from real engineering work.
How this site now prefetches the next page before you click it: prefetch vs prerender, the four eagerness levels, the exact rules we deployed, and the pitfalls that make prerendering tricky.
By Alex I
read article →Why hooks are confusing (it's a mental model problem, not syntax), how useState and useEffect actually work, what the dependency array declares, and when useCallback and useMemo genuinely help.
By Alex I
read article →How signature verification works, access and refresh token patterns, the vulnerability classes that recur most in production, and the cases where server-side sessions remain the better choice.
By Alex I
read article →What strict: true actually enables, which flags catch the most bugs, what strict mode still misses, and a practical migration path for existing codebases.
By Alex I
read article →A practical guide to Cache-Control directives, ETags, CDN vs browser caching, the immutable-assets pattern, and the common mistakes that leave performance on the table.
By Alex I
read article →A clear explanation of the virtual dom, how diffing algorithms improve performance in frameworks like react, and its underlying rendering mechanics.
By Alex I
read article →The mental model, the handful of properties that do the real work, responsive grids without media queries, the minmax overflow trap, and when to reach for flexbox instead.
By Alex I
read article →Identity as the control plane, phishing-resistant auth, mtls and micro-segmentation, policy-as-code, and a realistic migration path with its pitfalls.
By Alex I
read article →The cases where wasm genuinely beats javascript, the js-wasm boundary that decides real performance, when not to use it, and where wasi is taking it beyond the browser.
By Alex I
read article →LCP, INP, and CLS are google's three measures of real page experience. this hands-on guide breaks down what each metric captures, the thresholds that matter, and the techniques used most often to improve them.
By Alex I
read article →How csp defends against xss, strict policies with nonces and strict-dynamic, the allowlist approach for static hosts, and rolling out safely with report-only mode.
By Alex I
read article →Forms are where the web gets serious. learn the labels, fieldsets, error handling, and keyboard support that make a form usable for screen-reader, keyboard, and mobile users alike.
By Alex I
read article →Modern jamstack sites leverage cdn edge processing to dynamically render content and run middleware closest to the visitor, yielding ultra-fast page speeds and lower latency globally.
By Alex I
read article →Cumulative layout shift (cls) is a vital user-experience metric. learn how proper element structure, media aspect ratios, and fixed-dimension containers can prevent structural shifts and improve page scores.
By Alex I
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