What does ! mean in the context of react refs?

Question

    return x - this.cell.current!.getBoundingClientRect().left;

I can't seem to figure out what the ! is doing.

[Non-null assertion operator](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-0.html#non-null-assertion-operator) — ASDFGerte, Dec 19 '19 at 00:51
Does this answer your question? [! operator in typescript after object method](https://stackoverflow.com/questions/38874928/operator-in-typescript-after-object-method) — ASDFGerte, Dec 19 '19 at 00:52

score 1 · Answer 1 · answered Dec 19 '19 at 00:51

1

That means that you are sure that variable value this.cell.current is not undefined or null

answered Dec 19 '19 at 00:51

1 Answers1