In TypeScript, a postfix ! removes null and undefined from the type of an expression.
This is useful when you know, for reasons outside TypeScript’s inference ability, that a variable that “could” be null or undefined actually isn’t.
In TypeScript, a postfix ! removes null and undefined from the type of an expression.
This is useful when you know, for reasons outside TypeScript’s inference ability, that a variable that “could” be null or undefined actually isn’t.