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Diffstat (limited to 'chromium/third_party/node/node_modules/lit-html/directives/when.d.ts')
-rw-r--r-- | chromium/third_party/node/node_modules/lit-html/directives/when.d.ts | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/chromium/third_party/node/node_modules/lit-html/directives/when.d.ts b/chromium/third_party/node/node_modules/lit-html/directives/when.d.ts new file mode 100644 index 00000000000..1af1e70004c --- /dev/null +++ b/chromium/third_party/node/node_modules/lit-html/directives/when.d.ts @@ -0,0 +1,28 @@ +/** + * @license + * Copyright 2021 Google LLC + * SPDX-License-Identifier: BSD-3-Clause + */ +type Falsy = null | undefined | false | 0 | -0 | 0n | ''; +/** + * When `condition` is true, returns the result of calling `trueCase()`, else + * returns the result of calling `falseCase()` if `falseCase` is defined. + * + * This is a convenience wrapper around a ternary expression that makes it a + * little nicer to write an inline conditional without an else. + * + * @example + * + * ```ts + * render() { + * return html` + * ${when(this.user, () => html`User: ${this.user.username}`, () => html`Sign In...`)} + * `; + * } + * ``` + */ +export declare function when<C extends Falsy, T, F = undefined>(condition: C, trueCase: (c: C) => T, falseCase?: (c: C) => F): F; +export declare function when<C, T, F>(condition: C extends Falsy ? never : C, trueCase: (c: C) => T, falseCase?: (c: C) => F): T; +export declare function when<C, T, F = undefined>(condition: C, trueCase: (c: Exclude<C, Falsy>) => T, falseCase?: (c: Extract<C, Falsy>) => F): C extends Falsy ? F : T; +export {}; +//# sourceMappingURL=when.d.ts.map
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