In addition to npm start you must place the name of the .js file that you want to start, eg: npm start app.js

The command:

npm start

looks in package.json for a script with the name "start" to execute the associated action. In this case, package.json does not contain a definition of "start" and that's why it gives you that error.

It seems that the project you want to use is a library to be used from another program, and it can not be executed on its own.

As they say you have several forms, those discussed above and another. I'm going to make a small guide to install the software, check the versions and run a script.

INSTALLING NODE AND NPM

Keep in mind that for a script that uses npm libraries to work, you have to have:

• node installed.
• npm installed.

CHECK NODE AND NPM VERSIONS

Once installed, we can check the version we have:

From node:

node -v

From npm:

npm -v

For example, I have:

EXECUTE NODEJS SCRIPT

There are 3 ways to run a node script via terminal.

1. Run via npm start telling you which file:

npm start index.js

2. Define the package.json field in the script file:

"scripts": {
  "start": "node index.js"
}

And run with:

npm start

3. Run the script via the node command:

node fichero.js

Specifically, in the case of the yagop API it would be:

node index.js