import { Input as Primitive } from "@base-ui/react/input";
import * as React from "react";
/**
 * The inline height an autosizing textarea should carry, or `""` for "leave it to CSS".
 *
 * ponytail: this whole observer is here only until `field-sizing: content` is baseline. One CSS
 * line does the same job. Ceiling: it does not exist in every browser we support yet.
 */
export declare function textareaHeight(clientWidth: number, scrollHeight: number): string;
type FieldChrome = {
    label?: React.ReactNode;
    /**
     * The message under the field. Its presence is what wires `aria-invalid` and
     * `aria-describedby`, so a field that looks wrong also announces that it is.
     */
    error?: React.ReactNode;
    /**
     * Classes for the control. A plain string here, not Base UI's state-callback form: this
     * component renders a native `<textarea>` for the multiline case, which has no Base UI
     * state to call back with, and one field type styling differently from the other would be
     * a worse trade than the callback is worth.
     */
    className?: string;
    wrapperClassName?: string;
    labelClassName?: string;
    errorClassName?: string;
};
export type InputProps = FieldChrome & Omit<Primitive.Props, "className"> & {
    multiline?: false;
};
export type MultilineInputProps = FieldChrome & Omit<React.ComponentProps<"textarea">, "className"> & {
    multiline: true;
};
export type FieldProps = InputProps | MultilineInputProps;
/**
 * A field with its label, its error, and the aria that ties the three together.
 *
 * That wiring is the reason this exists: `htmlFor`/`id`, `aria-describedby` pointing at the
 * error, `aria-invalid` set from the same prop that draws the red border, and an id generated
 * when the caller has not given one. Every one of those is a line somebody forgets, and
 * forgetting it is invisible until a screen reader reads the field with no name and no reason.
 */
export declare function Input(props: FieldProps): React.JSX.Element;
export {};
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