type HTMLTags = HTMLElementTagNameMap & Omit<SVGElementTagNameMap, 'a'>
type AttrProps<Tag> = { [K in keyof Tag]?: Tag[K] extends Function ? never : string | number | boolean | null | undefined } & { children?: JSX.Child[], class?: string }

declare global {
  namespace JSX {
    type Component<P = never> = (props: P) => Element | null
    type Element<P = any> = { type: string | Component<P>, props: P }
    type Child = Child[] | Iterable<Child> | Element | string | number | boolean | null | undefined
    type IntrinsicElements = { [node: string]: {
      class?: { [className: string]: any } | string | false | null | undefined,
      style?: { [styleName: string]: any } | string | false | null | undefined,
      children?: Child
      [attr: string]: object | string | number | boolean | null | undefined
    } }
    interface ElementAttributesProperty { props: {}; }
    interface ElementChildrenAttribute { children: {}; }
  }
}

/**
 * Modern transform. Also exported via hyperjsx/jsx-runtime.
 */
export function jsx<P>(type: string | JSX.Component<P>, props: P): JSX.Element

/**
 * Classic transform.
 */
export function h<P>(type: string | JSX.Component<P>, ...children: JSX.Child[]): JSX.Element
export function h<P>(type: string | JSX.Component<P>, props: Omit<P, 'children'> | null, ...children: JSX.Child[]): JSX.Element

/**
 * Fragment
 */
export function Fragment(props?: { children?: JSX.Child }): JSX.Element

/**
 * Error boundary
 */
export const ErrorBoundary: JSX.Component<{
  fallback?: JSX.Child | ((data: { error: any }) => JSX.Child)
  onError?: (error: any) => any
  children?: JSX.Child
}>

/**
 * Basic context provider
 */
export type ContextComponent<T> = JSX.Component<{ value: T, children?: JSX.Child }>

export function createContext<T>(defaultValue: T): ContextComponent<T>

export function useContext<T>(context: ContextComponent<T>): T

export function useId(): string

/**
 * Render to string
 */
export function render(root: JSX.Element, options?: Options): string

export interface Options {
  indent?: string | false
  xml?: boolean
}