/**
 * Root Prefix Transform.
 */

import {isString, trimEnd} from '../util';

export default function (options, next) {

    var url = next(options);

    if (isString(options.root) && !/^(https?:)?\//.test(url)) {
        url = trimEnd(options.root, '/') + '/' + url;
    }

    return url;
}