Guild.member may return undefined about discord.js-typings HOT 4 CLOSED

This is invalid. undefined and null are subtypes of all types. Anything and everything can have null or undefined compared to or assigned to it.

https://www.typescriptlang.org/docs/handbook/basic-types.html

Scroll down to the Null and Undefined section for more information.

from discord.js-typings.

Yes, but --strictNullChecks won't catch it without an explicit definition.

from discord.js-typings.

Accommodating strictNullChecks in typings is one: an exercise in frustration, and two: not common practice in module typings from what I have seen.

To my knowledge strictNullChecks prevents you from assigning null/undefined to variables declared as anything but null/undefined or from returning them in non-void functions that don't explicitly state it. This does not prevent you from making checks to verify that a returned value is actually null or undefined.

I could be wrong, I suppose but I personally have no intention of throwing | null | undefined union types onto every method return signature.

from discord.js-typings.

--strictNullChecks forces you to either explicitly handle a potential null value or get a compile-time type error (say you intended to return number, but you're actually returning number | undefined, which is an error). See here: https://www.typescriptlang.org/docs/handbook/advanced-types.html

from discord.js-typings.