What are some common errors when using union types in TypeScript?

What are some common errors when using union types in TypeScript?

Common errors include not handling all possible types, using incompatible types, and forgetting to check type guards.

Can you give me an example of a type guard?

Sure! A type guard can be a function that checks the type of a variable, like this: function isString(value: any): value is string { return typeof value === 'string'; }.

What happens if I don't use type guards?

If you don't use type guards, TypeScript may throw errors or behave unexpectedly when trying to access properties of a union type.

How can I improve my type checking?

You can improve type checking by using more specific types, leveraging type guards, and utilizing TypeScript's built-in utility types.