NodeJS : Node js & mongoDB - TypeError: db.collection is not a function

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
After that, type the word 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

An introduction to myself in a few words,
Hi there, I go by the name of Delphi.
Let me assist you in answering any questions you may have.
Let me know if you have more specific questions or concerns by leaving a comment or starting a chat.
Your input is appreciated, so please leave a comment below with your answer or insights to the answer.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.