What is type narrowing in TypeScript?
An example of an AI chatbot conversation about type narrowing in TypeScript.
What is type narrowing in TypeScript?
Type narrowing in TypeScript is a technique that allows you to refine the type of a variable within a specific scope, making your code safer and more predictable.
Can you give me an example of type narrowing?
Sure! For instance, if you have a variable that can be either a string or null, you can use an if statement to check if it's a string, thus narrowing its type.
How does type narrowing improve type safety?
Type narrowing helps prevent runtime errors by ensuring that operations on variables are valid for their narrowed types, enhancing overall type safety.
Are there different ways to narrow types in TypeScript?
Yes, you can narrow types using type guards, the 'in' operator, 'typeof' checks, and more, each serving different scenarios.
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