@wordpress/url/src/get-fragment.js

WordPress URL utilities.

/**
 * Returns the fragment part of the URL.
 *
 * @param {string} url The full URL
 *
 * @example
 * ```js
 * const fragment1 = getFragment( 'http://localhost:8080/this/is/a/test?query=true#fragment' ); // '#fragment'
 * const fragment2 = getFragment( 'https://wordpress.org#another-fragment?query=true' ); // '#another-fragment'
 * ```
 *
 * @return {string|void} The fragment part of the URL.
 */
export function getFragment( url ) {
	const matches = /^\S+?(#[^\s\?]*)/.exec( url );
	if ( matches ) {
		return matches[ 1 ];
	}
}