/**
 * Config lets you change multiple or a single value in an apps mode configuration. Things such as tab placement, icon changes, and view animations can be set here.
 *
 * ```ts
 * @App({
 *   template: `<ion-nav [root]="root"></ion-nav>`
 *   config: {
 *     backButtonText: 'Go Back',
 *     iconMode: 'ios',
 *     modalEnter: 'modal-slide-in',
 *     modalLeave: 'modal-slide-out',
 *     tabbarPlacement: 'bottom',
 *     pageTransition: 'ios',
 *   }
 * })
 * ```
 *
 * Config can be overwritting at multiple levels, allowing deeper configuration. Taking the example from earlier, we can override any setting we want based on a platform.
 * ```ts
 * @App({
 *   template: `<ion-nav [root]="root"></ion-nav>`
 *   config: {
 *     tabbarPlacement: 'bottom',
 *     platforms: {
 *      ios: {
 *        tabbarPlacement: 'top',
 *      }
 *     }
 *   }
 * })
 * ```
 *
 * We could also configure these values at a component level. Take `tabbarPlacement`, we can configure this as a property on our `ion-tabs`.
 *
 * ```html
 * <ion-tabs tabbar-placement="top">
 *    <ion-tab tab-title="Dash" tab-icon="pulse" [root]="tabRoot"></ion-tab>
 *  </ion-tabs>
 * ```
 *
 * The property will override anything else set in the apps.
 *
 * The last way we could configure is through URL query strings. This is useful for testing while in the browser.
 * Simply add `?ionic<PROPERTYNAME>=<value>` to the url.
 *
 * ```bash
 * http://localhost:8100/?ionicTabbarPlacement=bottom
 * ```
 *
 * A config value can come from anywhere and be anything, but there are a default set of values.
 *
 * ``` javascript
 * // iOS
 * activator: 'highlight',
 * actionSheetEnter: 'action-sheet-slide-in',
 * actionSheetLeave: 'action-sheet-slide-out',
 * actionSheetCancelIcon: '',
 * actionSheetDestructiveIcon: '',
 * backButtonText: 'Back',
 * backButtonIcon: 'ion-ios-arrow-back',
 * iconMode: 'ios',
 * menuType: 'reveal',
 * modalEnter: 'modal-slide-in',
 * modalLeave: 'modal-slide-out',
 * pageTransition: 'ios-transition',
 * pageTransitionDelay: 16,
 * popupEnter: 'popup-pop-in',
 * popupLeave: 'popup-pop-out',
 * tabbarPlacement: 'bottom',

 * // MD
 * activator: 'ripple',
 * actionSheetEnter: 'action-sheet-md-slide-in',
 * actionSheetLeave: 'action-sheet-md-slide-out',
 * actionSheetCancelIcon: 'ion-md-close',
 * actionSheetDestructiveIcon: 'ion-md-trash',
 * backButtonText: '',
 * backButtonIcon: 'ion-md-arrow-back',
 * iconMode: 'md',
 * menuType: 'overlay',
 * modalEnter: 'modal-md-slide-in',
 * modalLeave: 'modal-md-slide-out',
 * pageTransition: 'md-transition',
 * pageTransitionDelay: 120,
 * popupEnter: 'popup-md-pop-in',
 * popupLeave: 'popup-md-pop-out',
 * tabbarHighlight: true,
 * tabbarPlacement: 'top',
 * tabSubPages: true,
 * ```
 *
 *
**/
export declare class Config {
    constructor(config: any);
    /**
     * For setting and getting multiple config values
     */
    /**
     * @private
     * @name settings()
     * @description
     */
    settings(): any;
    /**
    * For setting a single config values
    */
    /**
     * @private
     * @name set()
     * @description
     */
    set(): this;
    /**
     * For getting a single config values
     */
    /**
     * @private
     * @name get()
     * @description
     */
    get(key: any): any;
    /**
     * @private
     */
    setPlatform(platform: any): void;
    static setModeConfig(mode: any, config: any): void;
    static getModeConfig(mode: any): any;
}