File: choose.d.ts

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/**
 * @license
 * Copyright 2021 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
/**
 * Chooses and evaluates a template function from a list based on matching
 * the given `value` to a case.
 *
 * Cases are structured as `[caseValue, func]`. `value` is matched to
 * `caseValue` by strict equality. The first match is selected. Case values
 * can be of any type including primitives, objects, and symbols.
 *
 * This is similar to a switch statement, but as an expression and without
 * fallthrough.
 *
 * @example
 *
 * ```ts
 * render() {
 *   return html`
 *     ${choose(this.section, [
 *       ['home', () => html`<h1>Home</h1>`],
 *       ['about', () => html`<h1>About</h1>`]
 *     ],
 *     () => html`<h1>Error</h1>`)}
 *   `;
 * }
 * ```
 */
export declare const choose: <T, V, K extends T = T>(value: T, cases: [K, () => V][], defaultCase?: (() => V) | undefined) => V | undefined;
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