fs.appendFileSync does not accept a number type in data argument node v14

Version: 14.1.0
Platform: Windows 10
Subsystem: none
error: TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received type number (7)

this is the code:

const fs = require('fs')

fs.writeFileSync('notes.txt', 'NODEJS')


fs.appendFileSync('notes.txt', 7 )

I expected to get a file with: NODEJS7
I got : NODEJS

Seems like the correct behavior to me. Are you saying this worked in a previous version?

This isn't a bug, the validation was tightened up. See #31030.

Seems like the correct behavior to me. Are you saying this worked in a previous version?

YES actually I created a NODE COURSE, I was using node v13 but some students using node v14 got this issue so upgraded node and I got the same issue.

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