Types for this.parser don't match notes of v13 release because parser is omitted

[cascornelissen]

Marked version:
13.0.0

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Trying to migrate an extension by following the notes of the release results in code that's incompatible with the TypeScript types. The cause seems to be that RendererObject refers to RendererApi which is defined as Omit<_Renderer, "constructor" | "options" | "parser"> so parser is being omitted?

const extension: MarkedExtension = { // Added the explicit type here
  useNewRenderer: true,
  renderer: {
    heading(token) {
      // increase depth by 1
      const text = this.parser.parseInline(token.tokens);
      const level = token.depth;
      return `<h${level + 1}>${text}</h${level + 1}>`;
    }
  }
};

marked.use(extension);

Expected behavior
The example works as expected.

[UziTech]

That is because the this that is passed in is a Renderer not a RendererObject.

The function signature in typescript should be

heading(this: Renderer, token: Tokens.Heading): string {

[cascornelissen]

Based on the works as intended label I assume not, but is it not possible to type this correctly on the side of marked?

[UziTech]

You are creating the function so you need to type it correctly. The function signature I provided is the way you would create the correctly typed function.