FrontendHaltJavaScript·Intermediate·Conceptual·1 min read
What distinguishes an ES module from a classic script?
Short interview answer
An ES module has its own top-level scope, uses static import/export syntax, runs in strict mode, and is evaluated once per module graph instance. Browser modules are deferred by default and participate in dependency graph loading.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.