dateString parsing does not match resume-schema definition "optional" parts

[cometsong]

Bug

Parsing of date format in resume-schema has all parts optional except only year required.

This is implemented as a "definition" in their repo's schema.json:

https://github.com/jsonresume/resume-schema/blob/master/schema.json#L5

Recreate

To recreate, remove the month and day from one of the "work" entries, run the resumed render, view the result showing "Jan"

[rbardini]

That's because the JavaScript Date object will default to the first day of the month or first month of the year, if they're not defined:

const dateA = new Date('2023')
dateA.getFullYear() // 2023
dateA.getMonth() // 0 (month is 0-indexed)
dateA.getDate() // 1

const dateB = new Date('2023-06')
dateB.getFullYear() // 2023
dateB.getMonth() // 5
dateB.getDate() // 1

Thus, my recommendation is to always define the month, even though a monthless date is valid according to the schema.