/**
 * Checks if an event is supported in the current execution environment.
 *
 * NOTE: This will not work correctly for non-generic events such as `change`,
 * `reset`, `load`, `error`, and `select`.
 *
 * Borrows from Modernizr.
 *
 * @param {string} eventNameSuffix Event name, e.g. "click".
 * @param {?boolean} capture Check if the capture phase is supported.
 * @return {boolean} True if the event is supported.
 */
export declare function isEventSupported(eventNameSuffix: string, capture?: boolean): boolean;