Questions

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1Discuss different module system available to node js and difference between them?

2Difference between require and import.

3What are the modules in Node.js?

4What is the purpose of the module.exports?

5What is the command used to import external modules?

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02 / 05

Difference between require and import.

The require()` and import statements serve similar purposes but have some key differences:

require():

1
CommonJS Syntax: require('module')
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Synchronous: It loads modules one after another, blocking execution until the module is loaded.
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Supports Both CommonJS and ES Modules: You can use it to import both CommonJS and ES modules.
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No Explicit Default Export Support: It doesn't explicitly support default exports.
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Named Exports via Destructuring: You can use destructuring to import named exports.
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No Static Analysis (Tree Shaking): It doesn't enable tree shaking.
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No Dynamic Importing: It doesn't support dynamic importing.
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Used Primarily in Node.js.

import:

1
ES6 Syntax: import module from 'module'
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Asynchronous (Lazy Loading): It loads modules only when needed, improving performance.
3
Supports Only ES Modules: Requires .mjs extension for ES modules.
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Explicit Default Export Support: You can directly import default exports.
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Named Exports Directly: You can import named exports directly.
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Static Analysis: Enables tree shaking.
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Dynamic Importing Supported: You can use the import() function.
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Used in Modern JavaScript (Browser and Node.js).