import * as React from "react";
import * as PropTypes from "prop-types";
export type TextareaProps = React.HTMLProps<HTMLTextAreaElement> & {
    /** Called whenever the textarea resizes */
    onResize?: (e: Event) => void;
    /** Minimum number of visible rows */
    rows?: React.HTMLProps<HTMLTextAreaElement>["rows"];
    /** Maximum number of visible rows */
    maxRows?: number;
    /** Initialize `autosize` asynchronously.
     * Enable it if you are using StyledComponents
     * This is forced to true when `maxRows` is set.
     */
    async?: boolean;
};
export type State = {
    lineHeight: number | null;
};
export type DefaultProps = {
    rows: number;
    async: boolean;
};
export declare class Textarea extends React.Component<TextareaProps, State> {
    textarea: HTMLTextAreaElement | null;
    currentValue: TextareaProps["value"];
    static defaultProps: DefaultProps;
    static propTypes: {
        [key in keyof TextareaProps]: PropTypes.Requireable<any>;
    };
    state: State;
    onResize: (e: Event) => void;
    componentDidUpdate(): void;
    componentDidMount(): void;
    componentWillUnmount(): void;
    onChange: (e: React.SyntheticEvent<HTMLTextAreaElement>) => void;
    updateLineHeight: () => void;
    render(): React.JSX.Element;
}