Using arrow brackets in Flux Dispatcher code written in JavaScript

While exploring the source code on GitHub for the Flux Dispatcher, I came across an interesting syntax using angle brackets:

class Dispatcher<TPayload> { .... }

I'm curious to know if this is a new feature of the language or perhaps a subset like TypeScript. What adds to the confusion is that the file has a .js extension.

Can anyone shed some light on what this syntax means in this context?

Answer №1

This tool is designed for the Flow type checker developed by Facebook.

Learn more about Flow type checker here

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