Node.js - get arguments from command line

In this article, we would like to show you how to get arguments from command line in Node.js.

Quick solution:

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const arguments = process.argv;

​

// skip the first two

const arguments2 = process.argv.slice(2);

In this example, we use process.argv to get the arguments from command line. The arguments should be specified in the running command.

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const arguments = process.argv;

​

console.log(arguments);

1.1 Run the app without arguments:

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node index.js

Output:

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[

  'C:\\Program Files\\nodejs\\node.exe',

  'C:\\projects\\app\\index.js'

]

1.2 Run the app with arguments:

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node index.js arg1 arg2 arg3 

Output:

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[

  'C:\\Program Files\\nodejs\\node.exe',

  'C:\\projects\\app\\index.js',        

  'arg1',

  'arg2',

  'arg3'

]

In this example, we present how to skip the first two arguments of the process.argv when you don't need them.

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const arguments = process.argv.slice(2);

​

console.log(arguments);

2.1 Run the app without arguments:

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node index.js

Output:

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[]

2.2 Run the app with arguments:

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node index.js arg1 arg2 arg3 

Output:

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[ 'arg1', 'arg2', 'arg3' ]

• How to parse command line arguments | Node.js