@ckeditor/ckeditor5-utils/src/first.js

Miscellaneous utilities used by CKEditor 5.

/**
 * @license Copyright (c) 2003-2025, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
/**
 * @module utils/first
 */
/**
 * Returns first item of the given `iterator`.
 */
export default function first(iterator) {
    const iteratorItem = iterator.next();
    if (iteratorItem.done) {
        return null;
    }
    return iteratorItem.value;
}