Variable Declaration in TypeScript - Tutorialspoint
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Type annotations are used to enforce type checking. It is not mandatory in TypeScript to use type annotations. However, type annotations help the compiler in checking types and helps avoid errors dealing with data types.
Type Annotation in TypeScript - TutorialsTeacher
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TypeScript introduced a new type never , which indicates the values that will never occur. The never type is used when you are sure that something is never going to occur. For example, you write a function which will not return to its end point or always throws an exception.
TypeScript never Data Type - TutorialsTeacher
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In TypeScript, type assertion is a mechanism which tells the compiler about the type of a variable. ... Type assertion is explicitly telling the compiler that we want to treat the entity as a different type. It allows us to treat any as a number, or number as a string.
TypeScript Type Assertion - javatpoint
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