Type System React

A "fun" implementation of a JSX rendering engine similar to React's ... in the TypeScript type system.

export type ComponentRegistry = {
  Emoji: "💖";
  Heading: "<h1>{children}</h1>";
};

export type Result = Render<"<Heading>Hello, world! <Emoji /></Heading>">;

export type PrintMe = Result;
//          ^? type PrintMe = "<h1>Hello, world! 💖</h1>"

End Goal

This walkthrough includes:

• Rendering a self-closing element
• Rendering an element with {children}
• Component registry
• Bugs (probably) (almost certainly) (definitely)

It does not include:

• Space-sensitive parsing
• Props other than children
• Logic, including hooks or state
• React Server Components

What's Inside

1. src/foundations: Building up most of the general TypeScript syntax features we'll use to implement our JSX renderer
2. src/fun: Building up the JSX renderer using the foundational features

See the README.md files within each step, such as src/foundations/0-types/README.md.