/**
 * Displays a horizontal progress indicator showing the completion percentage of a task or process.
 *
 * Example
 * ```
 * <r-progress-bar progress="50" r-aria-label="Upload progress: 50%"></r-progress-bar>
 * ```
 */
export declare class ProgressBar {
    /** Progress bar value */
    progress: number;
    /**
     * Sets string value for `aria-label` attribute
     * (https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-label)
    */
    rAriaLabel: string;
    render(): any;
}