Debugging Errors: Type Assignability

This lesson advises you on how to approach one of the most common TypeScript compile errors.


The most common TypeScript error is related to type assignability. We get them whenever we want to use a value of some type when a different type is required. These are the bread and butter of TypeScript. The main goal of the type checker is to ensure that you provide values with correct types wherever required.

Most of the time, type assignability errors are straightforward. The error message says that the type of the right-hand side of the assignment is not assignable to the type of the left-hand side.

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