What sets apart the concepts of Boolean and boolean when it comes to Typescript?

I would like to understand the distinction between Boolean and boolean in Typescript. Can anyone provide an explanation?

Answer №1

When it comes to the uppercaseBoolean, it is considered as an object type.

On the other hand, when using the lowercaseboolean, it is classified as a primitive type.

It is recommended to always opt for usingboolean (the primitive type) in your coding endeavors. This is primarily because the Typescript type systemdoes not coerce an object to its primitive type, while JavaScriptdoes.

Avoid writing:

function yourFunction(foo: Boolean)

Instead, it is better practice to write:

function yourFunction(foo: boolean)

To delve deeper into this subject, you can refer to TypeScript Lang - Everyday Types

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