How to execute js file to iterate a mongo collection

I know it's a very generic question but this is a concept, I'm not sure since I've run everything, I've created a mongo collection with mongoImport and there I can find and find everything from the mongo shell, making node file.js runs line by line my js file but if I want to access a collection and iterate it they said it is something like mongo baseDeDatos Coleccion archivo.js . if in file.js I have: db.employees.find().forEach(employee => print(JSON.stringify(employee))) in which employee is each element of my collection that I must do more in the console to make that print, is executing mongo baseDeDatos Coleccion archivo.js from WHERE SHELL? from the mongo? from node? I do not have clear concepts. It would be great help if you explain to me. Thank you very much