1 KiB
Style Guide
- Use
for ... of
whenever possible
Rationale: for ... of
is awesome. It's more readable than any other variant.
- Don't use
any
as much as possible
Rationale: The language is called TypeScript, not UntypedScript. 😉 Static typing is wonderful. It catches bugs and improves readability. We should strive to use it as much as possible.
- Use
const
wherever possible.
Rationale: Instead of reading const
as "constant value," read it as "single assignment." Yes, it means "constant value" in other programming languages, but it's a little different in JavaScript.
- When we can't use
const
, uselet
; nevervar
Rationale: var
trips up programmers in a number of cases - hoisting and closure capture are two big ones. Consider the difference between
for (var j = 0; j < 5; j++) { setTimeout(() => console.log(j), 5) }
and
for (let j = 0; j < 5; j++) { setTimeout(() => console.log(j), 5) }
Even if you're not capturing the variable, who knows if someone else might later?