The non-null assertion operator tells the TypeScript compiler that a value typed as optional cannot be null or undefined. For example, if we define a variable as possibly a string or undefined, the ! operator tells TypeScript to ignore the possibility of it being undefined. We will be using these terms interchangeably in this article.
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What is the TypeScript exclamation mark?What the exclamation mark does in TypeScriptWe made a custom demo for . No really. Click here to check it out .Popular use cases for the TypeScript exclamation markThe downside of using the exclamation mark in TypeScriptAlternatives to using the TypeScript exclamation markConclusionWriting a lot of TypeScript? Watch the recording of our recent TypeScript meetup to learn about writing more readable code.Sort: