Can you explain what type guards are in TypeScript?
Type guards are special constructs that allow you to narrow down the type of a variable within a conditional block.
How do I implement a type guard in my code?
You can implement a type guard using the typeof
operator or by creating a user-defined type guard function.
Can you give me an example of a user-defined type guard?
Sure! Here's an example:
function isString(value: any): value is string {
return typeof value === 'string';
}
This function checks if a value is a string.
What are the benefits of using type guards?
Type guards improve type safety, help prevent runtime errors, and make your code more readable and maintainable.
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