export declare abstract class TuiInputBase extends HTMLElement {
    protected readonly shadow: ShadowRoot;
    $label: HTMLLabelElement;
    $input: HTMLInputElement;
    $inputGroup: HTMLDivElement;
    $subtitle: HTMLSpanElement;
    $clearButton: HTMLButtonElement;
    $magnifyingGlass: HTMLSpanElement;
    $infoIcon: HTMLSpanElement;
    $toolTipText: HTMLSpanElement;
    $asterisk: HTMLSpanElement;
    $errorContainer: HTMLDivElement;
    $errorMessage: HTMLSpanElement;
    protected constructor();
    abstract get template(): HTMLTemplateElement;
    protected initializeShadowDom(): void;
    static get observedAttributes(): string[];
    get label(): string;
    set label(value: string);
    get readOnly(): boolean;
    set readOnly(readOnly: boolean);
    get disabled(): boolean;
    set disabled(disabled: boolean);
    get errorMessage(): string;
    set errorMessage(errorMessage: string);
    attributeChangedCallback(name: string, oldValue: string, newValue: string): void;
    connectedCallback(): void;
    handleKeyDownEvent(event: KeyboardEvent): void;
    setMaxLength(newValue: string): void;
    setReadOnly(newValue: string): void;
    setDisabled(newValue: string): void;
    hideElements(hide: boolean): void;
    setErrorVisibility(isErrorVisible: boolean, message?: string): void;
    toggleClearButton(hide?: boolean): void;
    abstract handleClearButtonClick(): void;
    checkValue(newValue: string | null): boolean;
    toggleSearchIcon(): void;
    private updateLabelGroupClass;
    private updateSubtitleClass;
}