import { TextMorphEngineOptions } from './types';
export declare const DEFAULT_MORPH_TAG = "span";
export declare class TextMorphEngine {
    private element;
    private options;
    private data;
    private currentMeasures;
    private prevMeasures;
    private previousSegments;
    private isInitialRender;
    private reducedMotion;
    private srNode;
    private hasSetup;
    constructor(options: TextMorphEngineOptions);
    /** Deferred, not done in the constructor: `prefers-reduced-motion` can change after it. */
    private setup;
    destroy(): void;
    private isDisabled;
    /** `cursorIndex` switches a single-number value from place matching to caret matching. */
    update(value: string | number, cursorIndex?: number): void;
    private createTextGroup;
    private updateStyles;
    /** Holds the value as plain text — the segments are split and aria-hidden, so unreadable. */
    private syncAccessibleText;
}