I have just come across
this.person!.name
in my codebase, previously I have seen this.person?.name which is optional chaining, but I have never seen ! be used nor can I find any resource to explain it's use, can anyone shed any light on it?
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1It means that according to Typescript, `this.person` can be null or undefined, but the developer who coded this know that in this specific case, the value can't be null or undefined, so he added `!` to remove the warning about nullability – AoooR Nov 03 '22 at 15:52
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It's slightly worrying that you tagged this [tag:typescript] code in *your codebase* as [tag:javascript]. – Quentin Nov 03 '22 at 15:53