import { TemplateResult } from "lit-element";
import { ITextfieldBehaviorProperties, TextfieldBehavior } from "../behavior/textfield/textfield-behavior";
/**
 * Properties of the textarea.
 */
export interface ITextareaProperties extends ITextfieldBehaviorProperties {
}
/**
 * Multiline text fields.
 * @cssprop --textarea-resize - Resize strategy
 * @cssprop --textarea-height - Height
 * @cssprop --textarea-min-height - Min height
 * @cssprop --textarea-max-height - Max height
 */
export declare class Textarea extends TextfieldBehavior implements ITextareaProperties {
    static styles: import("lit-element").CSSResult[];
    /**
     * Hooks up the element.
     */
    connectedCallback(): void;
    /**
     * Refresh the height at the first interaction.
     * @param props
     */
    firstUpdated(props: Map<keyof ITextareaProperties, unknown>): void;
    /**
     * Refreshes the height of the textarea each time the user interacts with it.
     * @param e
     */
    onInput(e: Event): void;
    /**
     * Refreshes the height of the textarea.
     */
    refreshHeight(): void;
    /**
     * Sets the height of the form element while respecting a potential user set CSS property.
     * @param height
     */
    protected setHeight(height?: number): void;
    /**
     * Returns the form element.
     * Initially the textarea will have rows set to 1.
     * This is to initially have the textarea starting with having the height of 1 row.
     * This is a good solution to avoid the textarea having the wrong height if initially being hidden.
     */
    protected renderFormElement(): TemplateResult;
}
declare global {
    interface HTMLElementTagNameMap {
        "wl-textarea": Textarea;
    }
}