Seonglae ChoSuffix Exclamation Mark after Variable
adding this operator causes the compiler to ignore undefined or null types
we should be extremely careful when using it, as it can lead to unexpected behaviour if the value is actually undefined
Exclamation Mark In TypeScript
If you are using TypeScript, you might have noticed an Exclamation Mark (!) operator that does some kind of magic and makes your compiler ignore possible errors. Let's learn what the purpose of this operator is and how it can be a useful addition to our projects.
https://vhudyma-blog.eu/exclamation-mark-operator-in-typescript/
