19 lines
497 B
Markdown
19 lines
497 B
Markdown
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---
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title: cjs
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---
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**cjs** stands for **CommonJS**. It is a module system for JavaScript that was
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popularized by NodeJS, and as such typically used in server-side JavaScript.
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CommonJS uses the **require** keyword to import modules:
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```js
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const fs = require('fs')
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```
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In recent years, **cjs** is increasingly being replaced by **esm**, or ECMA
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Script Modules which is the official module system of the JavaScript language,
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and the future-proof choice.
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Since version 3, FreeSewing is ESM-only.
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