How does a browser load a web page from URL to first paint?
In broad strokes, the browser fetches the HTML document, parses it into a DOM, discovers linked resources, and often blocks or defers work depending on how CSS and scripts are loaded. CSS affects how the page is painted, while classic blocking scripts can delay parsing. Modern bundlers and `async`/`defer` help control that timing. The exact ordering depends on the page, but the mental model of parse → style → script timing → render is what teams debug in performance work.
<!doctype html><html><head><link rel="stylesheet" href="/app.css" /></head><body>…<script src="/app.js" defer></script></body></html>Start simple: try this concept in a tiny project before moving to advanced tools.
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