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export as namespace preact;
import { JSXInternal } from './jsx';
export import JSX = JSXInternal;
//
// Preact Virtual DOM
// -----------------------------------
export interface VNode<P = {}> {
type: ComponentType<P> | string;
props: P & { children: ComponentChildren };
key: Key;
/**
* ref is not guaranteed by React.ReactElement, for compatibility reasons
* with popular react libs we define it as optional too
*/
ref?: Ref<any> | null;
/**
* The time this `vnode` started rendering. Will only be set when
* the devtools are attached.
* Default value: `0`
*/
startTime?: number;
/**
* The time that the rendering of this `vnode` was completed. Will only be
* set when the devtools are attached.
* Default value: `-1`
*/
endTime?: number;
}
//
// Preact Component interface
// -----------------------------------
export type Key = string | number | any;
export type RefObject<T> = { current: T | null };
export type RefCallback<T> = (instance: T | null) => void;
export type Ref<T> = RefObject<T> | RefCallback<T>;
export type ComponentChild =
| VNode<any>
| object
| string
| number
| bigint
| boolean
| null
| undefined;
export type ComponentChildren = ComponentChild[] | ComponentChild;
export interface Attributes {
key?: Key;
jsx?: boolean;
}
export interface ClassAttributes<T> extends Attributes {
ref?: Ref<T>;
}
export interface PreactDOMAttributes {
children?: ComponentChildren;
dangerouslySetInnerHTML?: {
__html: string;
};
}
export type RenderableProps<P, RefType = any> = P &
Readonly<Attributes & { children?: ComponentChildren; ref?: Ref<RefType> }>;
export type ComponentType<P = {}> = ComponentClass<P> | FunctionComponent<P>;
export type ComponentFactory<P = {}> = ComponentType<P>;
export type ComponentProps<
C extends ComponentType<any> | keyof JSXInternal.IntrinsicElements
> = C extends ComponentType<infer P>
? P
: C extends keyof JSXInternal.IntrinsicElements
? JSXInternal.IntrinsicElements[C]
: never;
export interface FunctionComponent<P = {}> {
(props: RenderableProps<P>, context?: any): VNode<any> | null;
displayName?: string;
defaultProps?: Partial<P>;
}
export interface FunctionalComponent<P = {}> extends FunctionComponent<P> {}
export interface ComponentClass<P = {}, S = {}> {
new (props: P, context?: any): Component<P, S>;
displayName?: string;
defaultProps?: Partial<P>;
contextType?: Context<any>;
getDerivedStateFromProps?(
props: Readonly<P>,
state: Readonly<S>
): Partial<S> | null;
getDerivedStateFromError?(error: any): Partial<S> | null;
}
export interface ComponentConstructor<P = {}, S = {}>
extends ComponentClass<P, S> {}
// Type alias for a component instance considered generally, whether stateless or stateful.
export type AnyComponent<P = {}, S = {}> =
| FunctionComponent<P>
| Component<P, S>;
export interface Component<P = {}, S = {}> {
componentWillMount?(): void;
componentDidMount?(): void;
componentWillUnmount?(): void;
getChildContext?(): object;
componentWillReceiveProps?(nextProps: Readonly<P>, nextContext: any): void;
shouldComponentUpdate?(
nextProps: Readonly<P>,
nextState: Readonly<S>,
nextContext: any
): boolean;
componentWillUpdate?(
nextProps: Readonly<P>,
nextState: Readonly<S>,
nextContext: any
): void;
getSnapshotBeforeUpdate?(oldProps: Readonly<P>, oldState: Readonly<S>): any;
componentDidUpdate?(
previousProps: Readonly<P>,
previousState: Readonly<S>,
snapshot: any
): void;
componentDidCatch?(error: any, errorInfo: any): void;
}
export abstract class Component<P, S> {
constructor(props?: P, context?: any);
static displayName?: string;
static defaultProps?: any;
static contextType?: Context<any>;
// Static members cannot reference class type parameters. This is not
// supported in TypeScript. Reusing the same type arguments from `Component`
// will lead to an impossible state where one cannot satisfy the type
// constraint under no circumstances, see #1356.In general type arguments
// seem to be a bit buggy and not supported well at the time of this
// writing with TS 3.3.3333.
static getDerivedStateFromProps?(
props: Readonly<object>,
state: Readonly<object>
): object | null;
static getDerivedStateFromError?(error: any): object | null;
state: Readonly<S>;
props: RenderableProps<P>;
context: any;
base?: Element | Text;
// From https://github.com/DefinitelyTyped/DefinitelyTyped/blob/e836acc75a78cf0655b5dfdbe81d69fdd4d8a252/types/react/index.d.ts#L402
// // We MUST keep setState() as a unified signature because it allows proper checking of the method return type.
// // See: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/18365#issuecomment-351013257
setState<K extends keyof S>(
state:
| ((
prevState: Readonly<S>,
props: Readonly<P>
) => Pick<S, K> | Partial<S> | null)
| (Pick<S, K> | Partial<S> | null),
callback?: () => void
): void;
forceUpdate(callback?: () => void): void;
abstract render(
props?: RenderableProps<P>,
state?: Readonly<S>,
context?: any
): ComponentChild;
}
//
// Preact createElement
// -----------------------------------
export function createElement(
type: string,
props:
| (JSXInternal.HTMLAttributes &
JSXInternal.SVGAttributes &
Record<string, any>)
| null,
...children: ComponentChildren[]
): VNode<any>;
export function createElement<P>(
type: ComponentType<P>,
props: (Attributes & P) | null,
...children: ComponentChildren[]
): VNode<any>;
export namespace createElement {
export import JSX = JSXInternal;
}
export function h(
type: string,
props:
| (JSXInternal.HTMLAttributes &
JSXInternal.SVGAttributes &
Record<string, any>)
| null,
...children: ComponentChildren[]
): VNode<any>;
export function h<P>(
type: ComponentType<P>,
props: (Attributes & P) | null,
...children: ComponentChildren[]
): VNode<any>;
export namespace h {
export import JSX = JSXInternal;
}
//
// Preact render
// -----------------------------------
export function render(
vnode: ComponentChild,
parent: Element | Document | ShadowRoot | DocumentFragment,
replaceNode?: Element | Text
): void;
export function hydrate(
vnode: ComponentChild,
parent: Element | Document | ShadowRoot | DocumentFragment
): void;
export function cloneElement(
vnode: VNode<any>,
props?: any,
...children: ComponentChildren[]
): VNode<any>;
export function cloneElement<P>(
vnode: VNode<P>,
props?: any,
...children: ComponentChildren[]
): VNode<P>;
//
// Preact Built-in Components
// -----------------------------------
// TODO: Revisit what the public type of this is...
export const Fragment: ComponentClass<{}, {}>;
//
// Preact options
// -----------------------------------
/**
* Global options for preact
*/
export interface Options {
/** Attach a hook that is invoked whenever a VNode is created. */
vnode?(vnode: VNode): void;
/** Attach a hook that is invoked immediately before a vnode is unmounted. */
unmount?(vnode: VNode): void;
/** Attach a hook that is invoked after a vnode has rendered. */
diffed?(vnode: VNode): void;
event?(e: Event): any;
requestAnimationFrame?: typeof requestAnimationFrame;
debounceRendering?(cb: () => void): void;
useDebugValue?(value: string | number): void;
_addHookName?(name: string | number): void;
__suspenseDidResolve?(vnode: VNode, cb: () => void): void;
// __canSuspenseResolve?(vnode: VNode, cb: () => void): void;
}
export const options: Options;
//
// Preact helpers
// -----------------------------------
export function createRef<T = any>(): RefObject<T>;
export function toChildArray(
children: ComponentChildren
): Array<VNode | string | number>;
export function isValidElement(vnode: any): vnode is VNode;
//
// Context
// -----------------------------------
export interface Consumer<T>
extends FunctionComponent<{
children: (value: T) => ComponentChildren;
}> {}
export interface PreactConsumer<T> extends Consumer<T> {}
export interface Provider<T>
extends FunctionComponent<{
value: T;
children: ComponentChildren;
}> {}
export interface PreactProvider<T> extends Provider<T> {}
export interface Context<T> {
Consumer: Consumer<T>;
Provider: Provider<T>;
displayName?: string;
}
export interface PreactContext<T> extends Context<T> {}
export function createContext<T>(defaultValue: T): Context<T>;
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