What does npm run do?

npm run runs a script described in the "scripts" section of package.json. It is a convenient way to run commands through npm without typing them directly into the terminal every time.

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#Example in package.json

#How to run them

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#What happens

• npm looks up the command in "scripts"
• runs the given line in the command shell
• adds local binaries from node_modules/.bin to PATH (for example, webpack, vite, eslint, etc.)

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#A shortcut

For a script named start, it's enough to just run:

This works the same as npm run start.

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#Summary

npm run executes the commands defined in package.json and lets you run project tools (webpack, vite, nodemon, tests, linters, and so on) in a uniform way.