context.js — svelte Source File

Source Code

/** @import { SSRContext } from '#server' */
import { DEV } from 'esm-env';
import * as e from './errors.js';

/** @type {SSRContext | null} */
export var ssr_context = null;

/** @param {SSRContext | null} v */
export function set_ssr_context(v) {
	ssr_context = v;
}

/**
 * @template T
 * @returns {[() => T, (context: T) => T]}
 * @since 5.40.0
 */
export function createContext() {
	const key = {};

	return [
		() => {
			if (!hasContext(key)) {
				e.missing_context();
			}

			return getContext(key);
		},
		(context) => setContext(key, context)
	];
}

/**
 * @template T
 * @param {any} key
 * @returns {T}
 */
export function getContext(key) {
	const context_map = get_or_init_context_map('getContext');
	const result = /** @type {T} */ (context_map.get(key));

	return result;
}

/**
 * @template T
 * @param {any} key
 * @param {T} context
 * @returns {T}
 */
export function setContext(key, context) {
	get_or_init_context_map('setContext').set(key, context);
	return context;
}

/**
 * @param {any} key
 * @returns {boolean}
 */
export function hasContext(key) {
// ... (73 more lines)