cohost/html/jsx/jsx-runtime.ts

import { fr, Html, Prop } from "../html.ts";

type SadProp = Prop | undefined | Html | Html[];
export type Component = (
  props: CProps,
  children: Html[],
) => Html;

export type CProps = {
  [key: string]: any;
};

interface Props {
  [key: string]: typeof key extends "children" ? never : SadProp;
  children: undefined | Html | Html[];
}

export function create_element(
  type: Component | string,
  props_?: Props,
): Html {
  const props: Props = props_ ?? { children: [] };
  const children: Html[] = [props.children ?? []].flat().filter((c) =>
    typeof c == "string" || typeof c == "object"
  );
  const attributes: CProps = {};

  for (const [key, val] of Object.entries(props)) {
    if (
      key == "children" || typeof val == "undefined"
    ) continue;
    attributes[key] = val;
  }

  if (typeof type == "string") {
    return { tag: type, attributes, children };
  } else {
    return type(attributes, children);
  }
}

export function Fragment(
  _: Record<string | number | symbol, never>,
  children: Html[],
) {
  return fr(...children);
}

export const jsx = create_element;
export const jsxs = create_element;