What is type erasure in TypeScript?
An example of an AI chatbot conversation about type erasure in TypeScript.
What is type erasure in TypeScript?
Type erasure in TypeScript refers to the process where type information is removed during compilation, resulting in JavaScript code that doesn't retain type annotations.
Can you give me an example of type erasure?
Sure! For instance, when you define a generic function in TypeScript, the type parameters are erased in the compiled JavaScript, making it impossible to check types at runtime.
How does this affect type safety?
It means that while TypeScript provides type safety during development, once the code is compiled to JavaScript, those types are not enforced, which can lead to runtime errors if not handled carefully.
Are there any ways to mitigate issues caused by type erasure?
Yes, you can use runtime type checks or libraries like io-ts to validate types at runtime, helping to catch errors that type erasure might introduce.
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