Sometimes in a TypeScript codebase you might see code like this: const bar = myObject!.foo!.bar // or const obj = myObject! The exclamation/bang operator that comes after accessing a property (also called a "postfix bang") is known as a non-null assertion. The use case for this operator is

You're writing a TypeScript application and you hit an error like this: Argument of type 'string' is not assignable to parameter of type 'number'.(2345) This could happen for a number of reasons. For example, I often run into this when reading a value