node helloworld.js alex
I want it to console.log() alex. How do I pass "alex" as an argument into the code?
In python ,it is sys.argv[1]
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You can access command line arguments using process.argv in node.js.
The array also includes the node command and the application file, so the first custom command line argument will have an index = 2.
process.argv[2] === 'alex'; // true
Jørgen
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Jørgen is right, but mind that "alex" is `process.argv[2]` in the example. – Linus Thiel Jul 13 '12 at 09:22
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Thanks, I included it in the answer :) – Jørgen Jul 13 '12 at 09:43
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If your requirements are more complex and you can take advantage of a command line argument parser, there are several choices. Two that seem popular are
- https://www.npmjs.org/package/minimist (simple and minimal)
- https://www.npmjs.org/package/nomnom (option parser with generated usage and commands)
More options available at How do I pass command line arguments?
