When a program is written in a certain language, then "in" is used. But I don't know what preposition to use with frameworks and libraries.
For example, I saw that some people say:
It's written in Node.js
But Node.js isn't a language, it's a runtime environment, so I would say:
But if one doesn't want to mention a language explicitly, what preposition should be used?
Examples with frameworks:
- A test written in/with Cypress
- An app written in/with Express
Also, I wonder can "written" be omitted? For example:
There are many tests in/with Cypress