Engineering notes
Articles for people who
ship the stack
Original rewrites on React, Node.js, TypeScript and AI — practical notes from the same engineering practice behind our operator software. Article bodies are in English.
Tagged: scope
JavaScript scope and hoisting for QA automation engineers
Part 8 for QA learners: global, function, and block scope; var vs let vs const; hoisting; the temporal dead zone; and how these rules keep test data from leaking.
1673 wordsRead articleWhere a Function Is Written Decides What It Sees: JavaScript Lexical Scope
Understand how JavaScript resolves a variable name through lexical environments, why the call site never matters for lookup, and how this carries into React handlers.
2586 wordsRead articleHow JavaScript's Scope Chain Actually Resolves Variables
Explains the lexical scope chain mechanism behind variable lookup, why var causes loop bugs, and how closures naturally follow from it.
1393 wordsRead article
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About these articles
Yes. Each piece is an original English rewrite prepared for this site. Structure and code examples follow the source material; prose is rewritten and checked for overlap before export.
Technical posts ship in English first so code and API names stay exact. The site chrome (navigation, SEO shells) is available in all nine languages.
New drafts land in the publish queue as they pass editorial checks. Running the site import picks up only new or changed slugs — nothing is duplicated.
Treat samples as illustrative. Validate against your stack and licences before production use. For delivery work, contact us with the brief.
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