"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const getCurrentDocument_1 = __importDefault(require("./getCurrentDocument"));
/**
 * Get the current viewport element (scrolling element) of the current document, from a given element
 *
 * @param doc - Element to find the viewport element from
 * @return The viewport element
 *
 * @example
 *
 * ```ts
 * // Get the viewport of the current document
 * viewport();
 *
 * // Get the viewport of the current window
 * viewport(window);
 *
 * // Get the viewport of a given element
 * viewport(someElementInSomeDocument);
 * ```
 */
function viewport(elm) {
    const doc = getCurrentDocument_1.default(elm || document);
    return doc && (doc.scrollingElement || doc.documentElement);
}
exports.default = viewport;