Reuse a config variable of package.json in npm scripts

Question

Is it posible to reuse a variable of the config section?

...
"config": {
   "source": "Hello",
   "root": "$npm_package_config_source World"
}
...

I can do this in the scripts section but I don't know if it is possible in the config section or there is one approach to have incremental variables in order to avoid copy & paste...

It's not possible to reference a config var from inside the config object in the way that you are describing. You can only reference them from inside the scripts section of package.json. So if your config object is defined something like this: "config": {"source": "Hello", "root": "World"} and in your scripts section you have something like this: "scripts": { "say-hello": "echo $npm_package_config_source $npm_package_config_root"} - then running npm run say-hello will successfully log Hello World to your console. — RobC
– RobC, Commented May 9, 2018 at 10:03

Richard Nikolas · Accepted Answer · 2018-05-07 20:19:17Z

1

I don't think you can "reuse a variable" because there're not quite a variable. JSON files use key = value data, so every key have an unique value (or function). If you "reuse" any of the keys, you would overwrite the 'older' key/value.

answered May 7, 2018 at 20:19

Richard Nikolas

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