/**
 * Checks if the app is in light mode by checking the html element's data-theme attribute.
 * @returns { boolean } - Whether the app is in light mode or not.
 */
export declare const isLightMode: () => boolean;
export declare function generateRandomId(length?: number): string;
export type Attributes = {
    [key: string]: string;
};
/**
 * Elements inside of web components sometimes need to inherit global attributes
 * set on the host. For example, the inner input in `ion-input` should inherit
 * the `title` attribute that developers set directly on `ion-input`. This
 * helper function should be called in componentWillLoad and assigned to a variable
 * that is later used in the render function.
 *
 * This does not need to be reactive as changing attributes on the host element
 * does not trigger a re-render.
 */
export declare const inheritAttributes: (el: HTMLElement, attributes?: string[]) => Attributes;
export declare function generateElementId(): string;
/**
 * Creates a per-instance resolver for input element IDs.
 * Uses inputId when provided; otherwise lazily generates and caches a fallback ID.
 */
export declare function createEffectiveIdResolver(): (inputId?: string) => string;
/**
 * Returns an array of aria attributes that should be copied from
 * the shadow host element to a target within the light DOM.
 * @param el The element that the attributes should be copied from.
 * @param ignoreList The list of aria-attributes to ignore reflecting and removing from the host.
 * Use this in instances where we manually specify aria attributes on the `<Host>` element.
 */
export declare const inheritAriaAttributes: (el: HTMLElement, ignoreList?: string[]) => Attributes;
export declare const KEY: {
    [key: string]: string;
};
/**
 * Returns a safe URL string for use in link-like attributes.
 * Disallows dangerous protocols such as javascript:, data:, vbscript:, and file:.
 */
export declare const sanitizeUrl: (url?: string) => string | undefined;
/**
 * Shared assertions for form control label ↔ input id linkage.
 */
export declare function expectLabelLinkedToControl(root: HTMLElement, controlSelector: string): void;