/**
 * @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.io/license
 */

/** Coerces a data-bound value (typically a string) to a number. */
export function coerceNumberProperty(value: any): number;
export function coerceNumberProperty<D>(value: any, fallback: D): number | D;
export function coerceNumberProperty(value: any, fallbackValue = 0) {
  // 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.
  return isNaN(parseFloat(value as any)) || isNaN(Number(value)) ? fallbackValue : Number(value);
}