TypeScript Modules Tutorial: Align Imports, Exports and Runtime Resolution
TypeScript modules connect source files through exported values and types. Type-only imports express relationships needed for checking, while runtime imports require executable modules with compatible resolution. Package settings, file extensions and compiler options influence different parts of that process, so a path accepted by the checker is not automatically loadable everywhere.
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Why Use TypeScript Modules Tutorial: Align Imports, Exports and Runtime Resolution
- Distinguish imported types from executable dependencies
- Define explicit exports between source files
- Understand module resolution as an environment-dependent process
- Keep emitted paths compatible with runtime loading
- Recognize script scope versus module scope
Frequently Asked Questions
What does import type communicate?
It communicates that an import is used for static type relationships rather than as a runtime value. That distinction helps keep emitted dependencies appropriate, while actual executable imports still need compatible module resolution.
Does a paths setting rewrite runtime imports automatically?
Compiler path mapping guides supported static resolution behavior. It does not automatically supply every runtime or bundler implementation needed for the same alias, so the execution path must be configured consistently.
How is a module different from a script file?
Module scope is established under the project's module-detection conventions, commonly through imports or exports. A script can contribute to broader scope, making configuration and file context relevant to how declarations interact.
Why check package module conventions?
Package settings and exports affect how consumers load files and interpret formats. Their runtime role needs alignment with generated JavaScript and declarations rather than relying only on source import syntax.
Can an interface be imported and called as a function?
An interface describes a type and supplies no callable runtime implementation. Code needs an actual exported value for a function call, even when a similarly named static contract exists.