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Images in public behave like stable static assets, while imported images become build-managed module assets with automatic metadata and better ergonomics in component code.
Read Articlejest.isolateModules gives each callback its own module registry, which is useful when a test needs a clean import graph without resetting the whole suite.
Read Articlejsdom gives React tests a browser-like DOM inside Node, which makes it useful for component testing, event flows, and HTML inspection without opening a real browser.
Read ArticleMCP gives Copilot a standard way to discover tools, resources, and prompts so chat can interact with real systems instead of guessing at them.
Read ArticleThe rule exists because namespaces are usually a worse default than ES modules, even though they still have a narrow place in legacy code and declaration files.
Read ArticleObject.defineProperty is the descriptor-level API you reach for when a property needs to be read-only, hidden, computed, or otherwise more precise than a normal assignment.
Read ArticleAccessibility is a workflow you add to your stack: install static linting first, then rendered DOM checks, then Storybook review tools so problems surface early.
Read ArticlestartTransition lets React treat expensive updates as non-urgent so typing, clicking, and other direct interactions stay responsive while heavier work catches up.
Read ArticleBoth tools are extremely fast, but they optimize for different layers of the toolchain: esbuild is usually the better standalone bundler, while SWC is usually the better compiler inside frameworks and higher-level build systems.
Read ArticleNext.js environment files follow a specific naming scheme, load order, and browser exposure rule, and understanding those details prevents many staging and production configuration bugs.
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