If 1️⃣ is using TS in a strict sense, many errors/warnings regarding 'possibly null,' etc. can be resolved by using this utility fxn.

isNotNullOrUndefinedOrEmpty.ts

export function isNotNullOrUndefinedOrEmpty<T>(
  value: T | null | undefined,
): value is T {
  switch (true) {
    case value === null || value === undefined:
      return false;
    case typeof value === 'string':
      return value.trim() !== '';
    case Array.isArray(value):
      return value.length > 0;
    default:
      return true;
  }
}