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API Reference

Fusion is a modern reactive UI library, designed and built for Roblox and Luau.
Here, you can find documentation for every public API exposed by the Fusion module.

Using the sidebar on the left, you can find API members grouped by category. Alternatively, you can search for APIs using the search box at the top of the page.

Type Information

On many API pages, you'll see type annotations describing the API member. For example:

function New(className: string): (props: {[string | Symbol]: any}) -> Instance

While these type annotations are designed to be Luau-like, they are ultimately psuedocode included as a developer aid. For fully accurate and syntactically valid type information, please refer to the source code directly.

Commonly Used

Jump directly to the documentation for some common APIs:


State Management