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babel-cli

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babel-cli

Babel command line.

  • 6.26.0
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What is babel-cli?

The babel-cli package provides a command line interface for Babel, a JavaScript compiler that allows you to use next generation JavaScript, today. It can transform your JavaScript files using Babel plugins and presets, making it easier to write modern JavaScript code that works in older environments.

What are babel-cli's main functionalities?

Transpile JavaScript files

This command transpiles all JavaScript files in the 'src' directory and outputs the transformed files into the 'lib' directory. It uses the Babel configuration specified in your project to determine how to transform the code.

babel src --out-dir lib

Watch files for changes

This command is similar to the previous one, but it also watches the 'src' directory for changes. Whenever a file is modified, Babel will automatically re-transpile the file and output the updated version to the 'lib' directory.

babel src --out-dir lib --watch

Specify presets and plugins

This command allows you to specify Babel presets and plugins directly in the command line. In this example, it uses the '@babel/preset-env' preset and the '@babel/plugin-transform-arrow-functions' plugin to transform the code.

babel src --out-dir lib --presets @babel/preset-env --plugins @babel/plugin-transform-arrow-functions

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Package last updated on 16 Aug 2017

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