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packages/core/src/util/coercion.ts
47 строк
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SkyZeroZx
docs: Adds links to relevant guides for APIs in core package
17 ноя 2025, 19:47
17 ноя 2025, 19:47
0432e76
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/** * @license * Copyright Google LLC All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.dev/license */ /** * Transforms a value (typically a string) to a boolean. * Intended to be used as a transform function of an input. * * @usageNotes * ```ts * status = input({ transform: booleanAttribute }); * ``` * @param value Value to be transformed. * * @see [Built-in transformations](guide/components/inputs#built-in-transformations) * * @publicApi */ export function booleanAttribute(value: unknown): boolean { return typeof value === 'boolean' ? value : value != null && value !== 'false'; } /** * Transforms a value (typically a string) to a number. * Intended to be used as a transform function of an input. * @param value Value to be transformed. * @param fallbackValue Value to use if the provided value can't be parsed as a number. * * @usageNotes * ```ts * status = input({ transform: numberAttribute }); * ``` * * @publicApi * @see [Built-in transformations](guide/components/inputs#built-in-transformations) */ export function numberAttribute(value: unknown, fallbackValue = NaN): number { // parseFloat(value) handles most of the cases we're interested in (it treats null, empty string, // and other non-number values as NaN, where Number just uses 0) but it considers the string // '123hello' to be a valid number. Therefore we also check if Number(value) is NaN. const isNumberValue = !isNaN(parseFloat(value as any)) && !isNaN(Number(value)); return isNumberValue ? Number(value) : fallbackValue; }