1 line
1.5 KiB
Plaintext
1 line
1.5 KiB
Plaintext
|
{"version":3,"file":"when.js","sources":["../src/directives/when.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2021 Google LLC\n * SPDX-License-Identifier: BSD-3-Clause\n */\n\ntype Falsy = null | undefined | false | 0 | -0 | 0n | '';\n\n/**\n * When `condition` is true, returns the result of calling `trueCase()`, else\n * returns the result of calling `falseCase()` if `falseCase` is defined.\n *\n * This is a convenience wrapper around a ternary expression that makes it a\n * little nicer to write an inline conditional without an else.\n *\n * @example\n *\n * ```ts\n * render() {\n * return html`\n * ${when(this.user, () => html`User: ${this.user.username}`, () => html`Sign In...`)}\n * `;\n * }\n * ```\n */\nexport function when<C extends Falsy, T, F = undefined>(\n condition: C,\n trueCase: (c: C) => T,\n falseCase?: (c: C) => F\n): F;\nexport function when<C, T, F>(\n condition: C extends Falsy ? never : C,\n trueCase: (c: C) => T,\n falseCase?: (c: C) => F\n): T;\nexport function when<C, T, F = undefined>(\n condition: C,\n trueCase: (c: Exclude<C, Falsy>) => T,\n falseCase?: (c: Extract<C, Falsy>) => F\n): C extends Falsy ? F : T;\nexport function when(\n condition: unknown,\n trueCase: (c: unknown) => unknown,\n falseCase?: (c: unknown) => unknown\n): unknown {\n return condition ? trueCase(condition) : falseCase?.(condition);\n}\n"],"names":["when","condition","trueCase","falseCase"],"mappings":";;;;;SAwCgBA,EACdC,EACAC,EACAC,GAEA,OAAOF,EAAYC,EAASD,GAAaE,IAAYF,EACvD"}
|