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3.Global Module Definition (UMD)

UMD aims to be compatible with both‍ CommonJS and AMD, providing a single module ⁤format that‍ works in various​ environments.It attempts ⁤to detect the ⁢module system and adapt accordingly.

Syntax: A wrapper‌ function that checks for different module environments.
Use Cases: libraries‍ intended for use in both Node.js and browser environments.
Flexibility: Offers broad compatibility.

Syntax: import and export keywords.
Use Cases: Increasingly adopted in modern JavaScript projects,supported natively in browsers and Node.js (with some configuration).
Advantages: Standardized, optimized, and⁣ supports features‌ like tree ⁤shaking ⁣(removing unused code).

How Module ⁤Loaders ⁣Work: A Closer Look

Nonetheless of the format, module loaders generally ⁤follow these steps:

1. Dependency Resolution: The loader analyzes your code to identify⁣ module dependencies.
2. Module ​Loading: it⁤ fetches the required modules, either from local files or remote URLs.
3. Execution: The ​loader executes the modules in the correct order, ensuring dependencies are met.
4. Caching: Loaded modules⁤ are often cached to improve performance on subsequent loads.

Configuration and Mapping

Module loaders often require configuration to tell them where ​to find modules. This typically involves‌ defining​ "paths" or "aliases" that map module names to file locations.

for example, you might configure a loader to