Should properties of constants be capitalized?

Question

I know that it is conventional to capitalize constant values in programming, but would you do the same for their keys? I am trying to make a string based enum in javascript:

const SEASONS = {
  spring: 'spring',
  summer: 'summer',
  fall: 'fall',
  winter: 'winter'
}

// or

const SEASONS = {
  SPRING: 'spring',
  SUMMER: 'summer',
  FALL: 'fall',
  WINTER: 'winter'
}

Is it conventional to capitalize the keys, if they are also constant? So that you access their values by SEASONS.SPRING instead of SEASONS.spring?

Answer 1

As per MDN, Constants can be declared with uppercase or lowercase, but a common convention is to use all-uppercase letters.

There is no specific rule that the declaration SHOULD be in uppercase.

Uppercase indicates that the variable is a constant and they are immutable.

But the properties inside a constant are mutable and hence they CAN be declared as lowercase.

const SEASONS = {
  spring: 'spring',
  summer: 'summer',
  fall: 'fall',
  winter: 'winter'
}

SEASONS are immutable but SEASONS.spring is mutable, hence that CAN be considered as lowercase.

And again, there is no predefined rule for this. Its upto you, but you should follow the same pattern throughout the application.