/** * @license * Copyright Google Inc. 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 */ import * as ts from 'typescript'; export declare class BuildBrowserFeatures { private projectRoot; private scriptTarget; private readonly _es6TargetOrLater; readonly supportedBrowsers: string[]; constructor(projectRoot: string, scriptTarget: ts.ScriptTarget); /** * True, when one or more browsers requires ES5 * support and the scirpt target is ES2015 or greater. */ isDifferentialLoadingNeeded(): boolean; /** * True, when one or more browsers requires ES5 support */ isEs5SupportNeeded(): boolean; /** * True, when a browser feature is supported partially or fully. */ isFeatureSupported(featureId: string): boolean; }