NodeJS : fs.readFile() or fs.readFileSync() not a function exception but why?

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

I have a hidden feature that I promised to tell you about.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
After that, type the word 'awesome' on your keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

Allow me to introduce myself briefly,
Hello, I am Delphi.
I can be of service in providing you with answers to your inquiries.
If you have more specific query you can comment or chat with me and let me know your queries.
Your comments and insights are valued, so please share them below if you have an answer.
If you provide an answer, I will 'heart' it as a sign of gratitude.