How to list all the commands available in package.json?

You can use:

npm run

to list all commands. (Yarn also features similar functionality on yarn run.)

This behavior is made explicit in the help page of npm help run:

This  runs an arbitrary command from a package's "scripts" object.  If no "command" is provided, it will list the available scripts.

To get a quick overview if you have jq installed:

jq .scripts package.json

You can still pipe that subset to less if you need to

jq .scripts package.json | less

Furthermore, you can use tab completion via npm-completion and then you should see a list of possible commands when hitting tab and completes the commands if there is only one option left.

You can set it up temporarily via

source <(npm completion)

Depending on your terminal, you can make it persistent behavior by adding to your relevant config file:

npm completion >> ~/.bashrc
npm completion >> ~/.zshrc

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