Import/export syntax
Module import and export syntax declares dependencies between modules and makes selected bindings available to other modules.
The Joy of JavaScript
A JavaScript module feature for making bindings or values available to other modules.
- How it is used
- Standardizes how client and server modules expose, consume, and organize reusable JavaScript code.
- How deep it goes
- Defines module privacy, export forms, path specifiers, and static analysis, while deferring the complete set of syntax combinations.
- Examples
- Uses classes, validation utilities, blockchain domain modules, relative paths, absolute paths, and remote module URLs.
- What you can do after
- Apply it via ESM to design reusable module APIs and expose only the code other parts of an application need.
Read how The Joy of JavaScript explains import/export syntax →
Get Programming with JavaScript Next: New features of ECMAScript 2015, 2016, and beyond
A module syntax form that makes a declaration or value available outside the current module.
- How it is used
- Shares reusable functions and classes between modules without making their private helpers global.
- How deep it goes
- Works through default and named forms, import naming, read-only bindings, and top-level export placement without detailing module loading.
- Examples
- Uses a statistics logger with a private helper, formatting functions, class imports, and a lucky-number module exercise.
- What you can do after
- Build it from scratch: create a module with private state, export its public function, and import that function elsewhere.
Learn Haskell by Example
A module export is a definition made visible to code that imports the module containing it.
- How it is used
- Structures Haskell projects by grouping related definitions and controlling which names importing modules can use.
- How deep it goes
- Defines basic module, import, qualification, and re-export mechanics through examples, without explaining IO-action details.
- Examples
- Uses `Lib` and `Main` modules, an exported `someFunc`, qualified names, and a bundled `Csv` module.
- What you can do after
- Apply Haskell module syntax to expose definitions, import them elsewhere, qualify clashes, and bundle related exports.
Read how Learn Haskell by Example explains import/export syntax →
Pro Angular 16
An export statement is JavaScript or TypeScript module syntax that makes declarations available to importing modules, including through re-exported modules.
- How it is used
- Organizes application files into modules and declares dependencies between the features they provide.
- How deep it goes
- Explains default file visibility, named exports, import syntax, extension omission, and dependency-driven bundling without covering re-export syntax.
- Examples
- Demonstrates exported name and weather classes plus TodoItem and TodoList modules.
- What you can do after
- Apply named exports and imports to share classes between TypeScript files and produce a dependency-aware browser bundle.
Julia as a Second Language
An export statement is Julia syntax that makes selected bindings from a module available without requiring the module-name prefix.
- How it is used
- Makes selected module bindings callable without module-name prefixes in package code and REPL workflows.
- How deep it goes
- Explains the declaration and demonstrates its effect, but does not descend into module-loading internals.
- Examples
- Uses exported sine and cosine functions, REPL calls, built-in comparisons, and a CairoMakie plot.
- What you can do after
- Apply it by declaring public module functions and calling them directly after using the package.
Read how Julia as a Second Language explains import/export syntax →
Related concepts
- moduleused by · A module is a distinct, bounded software unit that groups related code or functionality and provides an organizational or interaction boundary within a larger system.
- default exportincludes · A default export is the module export designated for import as the module’s default, without requiring a matching exported name.
- named exportincludes · A named export is a module binding made available under an explicit name that importing code can reference, with optional renaming.
- data constructorconfigures · A data constructor is a named alternative of an algebraic data type that creates values of that type, optionally containing arguments.
- functionuses · A function is a callable program unit that performs an operation, may accept inputs, and can produce a result or side effect.
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