run playground.js or any other .js file

[ccknaus]

I am also new to JS, and I very much suffer playing around with the repository. Although all tests suffice, how I am suppose to run playground.js or any other created .js file? I also have difficulties importing the classes. I am not certain wheter the modules are written in ES6 or CommonJS?

Whenever I run playground.js in VSC tells me: (node:9600) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.

However, when I change package.json by adding a line "type": "module", I get another error: Error [ERR_MODULE_NOT_FOUND]: Cannot find module ...

[trekhleb]

@ccknaus you may find some helpful details in the How to use this repo section of README.

The idea is that instead of launching the ***.js script directly, you write the test ***.test.js script that checks what your ***.js script should do. And then you may just launch: npm test -- 'playground'

Take a look at the playground example:

• playground.js - here is an example of the function you're playing around and want to test
• playground.test.js - here is an example of the tests that check that your function works as expected
• npm test -- 'playground' - here is an example of the command that launches the tests

Feel free to update these files in your local environment. Imports should work, console.log() should work. So you'll be able to experiment with algorithms.

[ccknaus]

@trekhleb tank you for your response. I went through the fibonacci example.

Like i mentioned, I am fairly new to JS and git as well, so I am wondering why I can't import modules at all. Probabily I am at fault here, so I have to dig deeper into package manager stuff and such.