Gists for Medium Post https://medium.com/p/177b4a654ef6

some-object.ts

type SomeObjectType = {
  id: number;
  text: string;
}
let someObject: SomeObjectType | undefined;
if (someObject && Object.keys(someObject).length > 0) {
  //This evaluates as truthy because it's not undefined 
  someObject.id = 12;  //TS compiler doesn't complain here because the object exists
}