/**
 * @license
 * Copyright 2019 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import '../../focus/md-focus-ring.js';
import '../../ripple/ripple.js';
import { LitElement, PropertyValues } from 'lit';
/**
 * A checkbox component.
 */
export declare class Checkbox extends LitElement {
    /** @nocollapse */
    static shadowRootOptions: {
        delegatesFocus: boolean;
        mode: ShadowRootMode;
        slotAssignment?: SlotAssignmentMode;
    };
    /** @nocollapse */
    static readonly formAssociated = true;
    /**
     * Whether or not the checkbox is selected.
     */
    checked: boolean;
    /**
     * Whether or not the checkbox is disabled.
     */
    disabled: boolean;
    /**
     * Whether or not the checkbox is indeterminate.
     *
     * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox#indeterminate_state_checkboxes
     */
    indeterminate: boolean;
    /**
     * When true, require the checkbox to be selected when participating in
     * form submission.
     *
     * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox#validation
     */
    required: boolean;
    /**
     * The value of the checkbox that is submitted with a form when selected.
     *
     * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox#value
     */
    value: string;
    /**
     * The HTML name to use in form submission.
     */
    get name(): string;
    set name(name: string);
    /**
     * The associated form element with which this element's value will submit.
     */
    get form(): HTMLFormElement;
    /**
     * The labels this element is associated with.
     */
    get labels(): NodeList;
    /**
     * Returns a ValidityState object that represents the validity states of the
     * checkbox.
     *
     * Note that checkboxes will only set `valueMissing` if `required` and not
     * checked.
     *
     * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox#validation
     */
    get validity(): ValidityState;
    /**
     * Returns the native validation error message.
     *
     * https://developer.mozilla.org/en-US/docs/Web/HTML/Constraint_validation#constraint_validation_process
     */
    get validationMessage(): string;
    /**
     * Returns whether an element will successfully validate based on forms
     * validation rules and constraints.
     *
     * https://developer.mozilla.org/en-US/docs/Web/HTML/Constraint_validation#constraint_validation_process
     */
    get willValidate(): boolean;
    private prevChecked;
    private prevDisabled;
    private prevIndeterminate;
    private readonly input;
    private hasCustomValidityError;
    private readonly internals;
    constructor();
    /**
     * Checks the checkbox's native validation and returns whether or not the
     * element is valid.
     *
     * If invalid, this method will dispatch the `invalid` event.
     *
     * https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/checkValidity
     *
     * @return true if the checkbox is valid, or false if not.
     */
    checkValidity(): boolean;
    /**
     * Checks the checkbox's native validation and returns whether or not the
     * element is valid.
     *
     * If invalid, this method will dispatch the `invalid` event.
     *
     * The `validationMessage` is reported to the user by the browser. Use
     * `setCustomValidity()` to customize the `validationMessage`.
     *
     * https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/reportValidity
     *
     * @return true if the checkbox is valid, or false if not.
     */
    reportValidity(): boolean;
    /**
     * Sets the checkbox's native validation error message. This is used to
     * customize `validationMessage`.
     *
     * When the error is not an empty string, the checkbox is considered invalid
     * and `validity.customError` will be true.
     *
     * https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/setCustomValidity
     *
     * @param error The error message to display.
     */
    setCustomValidity(error: string): void;
    protected update(changed: PropertyValues<Checkbox>): void;
    protected render(): import("lit-html").TemplateResult<1>;
    protected updated(): void;
    private handleChange;
    private syncValidity;
    private getInput;
    /** @private */
    formResetCallback(): void;
    /** @private */
    formStateRestoreCallback(state: string): void;
}