Does ECMAScript differentiate between uppercase and lowercase letters?

It has come to my attention that JavaScript (the programming language that adheres to the specification) is sensitive to case. For instance, variable names:

let myVar = 1
let MyVar = 2 // distinct :)

I have not found any evidence in the official specification suggesting that this is a mandatory rule, so I am uncertain if it was purely a design choice unrelated to the spec.

Answer №1

I stumbled upon a reference that addresses this issue. Check out Names and Keywords for more details:

According to the Unicode standard, two IdentifierNames are considered canonically equivalent only if they have the exact same sequence of code points after replacing each UnicodeEscapeSequence.

It's worth noting that identifiers with different casing are not equal due to the distinction in the code points assigned to uppercase and lowercase letters.

Answer №2

Affirmative, it does adhere to the rules of case sensitivity, however, most developers in the realm of JavaScript tend to adopt the camelCase convention for their coding practices.

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