types.d.ts — svelte Source File

Source Code

import type { Store } from '#shared';
import { STATE_SYMBOL } from './constants.js';
import type { Effect, Source, Value } from './reactivity/types.js';

declare global {
	interface Window {
		__svelte?: {
			/** hydratables */
			h?: Map<string, unknown>;
		};
	}
}

type EventCallback = (event: Event) => boolean;
export type EventCallbackMap = Record<string, EventCallback | EventCallback[]>;

// For all the core internal objects, we use single-character property strings.
// This not only reduces code-size and parsing, but it also improves the performance
// when the JS VM JITs the code.

export type ComponentContext = {
	/** parent */
	p: null | ComponentContext;
	/** context */
	c: null | Map<unknown, unknown>;
	/** deferred effects */
	e: null | Array<() => void | (() => void)>;
	/** True if initialized, i.e. pop() ran */
	i: boolean;
	/**
	 * props — needed for legacy mode lifecycle functions, and for `createEventDispatcher`
	 * @deprecated remove in 6.0
	 */
	s: Record<string, unknown>;
	/**
	 * exports (and props, if `accessors: true`) — needed for `createEventDispatcher`
	 * @deprecated remove in 6.0
	 */
	x: Record<string, any> | null;
	/**
	 * legacy stuff
	 * @deprecated remove in 6.0
	 */
	l: null | {
		/** local signals (needed for beforeUpdate/afterUpdate) */
		s: null | Source[];
		/** update_callbacks */
		u: null | {
			/** afterUpdate callbacks */
			a: Array<() => void>;
			/** beforeUpdate callbacks */
			b: Array<() => void>;
			/** onMount callbacks */
			m: Array<() => any>;
		};
		/** `$:` statements */
		$: any[];
	};
	/**
	 * dev mode only: the component function
// ... (144 more lines)