import React, { ReactHTML, DetailedHTMLProps, HTMLAttributes, ReactElement } from 'react';

declare type Options = {
    mode?: "oneline" | "multiline" | "box" | "boxoneline" | undefined;
    minFontSizePx?: number | undefined;
    maxFontSizePx?: number | undefined;
    fontSizePrecisionPx?: number | undefined;
};
/**
 * Make text fit container, prevent overflow and underflow.
 *
 * Adjusts the font size of `innerEl` so that it precisely fills `containerEl`.
 */
declare function updateTextSize({ innerEl, containerEl, mode, minFontSizePx, maxFontSizePx, fontSizePrecisionPx, }: Options & {
    innerEl: HTMLElement;
    containerEl: HTMLElement;
}): void;
declare type DisconnectableFunction = {
    (): void;
    disconnect: () => void;
};
/**
 * Make text fit container, prevent overflow and underflow.
 *
 * Adjusts the font size of `innerEl` so that it precisely fills `containerEl`.
 *
 * Throttles all invocations to next animation frame (through
 * `requestAnimationFrame`).
 *
 * Sets up a `ResizeObserver` to automatically run `autoTextSize` when
 * `containerEl` resizes. Call `disconnect()` when done to disconnect the resize
 * observer to prevent memory leaks.
 */
declare function autoTextSize({ innerEl, containerEl, mode, minFontSizePx, maxFontSizePx, fontSizePrecisionPx, }: Options & {
    innerEl: HTMLElement;
    containerEl: HTMLElement;
}): DisconnectableFunction;

/**
 * Make text fit container, prevent overflow and underflow.
 */
declare function AutoTextSize({ mode, minFontSizePx, maxFontSizePx, fontSizePrecisionPx, as: Comp, // TODO: The `...rest` props are not typed to reflect another `as`.
children, ...rest }: Options & {
    as?: keyof ReactHTML | React.ComponentType<any>;
} & DetailedHTMLProps<HTMLAttributes<HTMLDivElement>, HTMLDivElement>): ReactElement;

export { AutoTextSize, autoTextSize, updateTextSize };