Url query parser (encode and decoding should be done separately)

UrlQueryParse.es6.js

/**
 * URI Query Parse
 *
 * By Will Squire <will_squire@hotmail.co.uk>
 */

/**
 * Parses uri query string into a key/value
 * array.
 *
 * Takes the query part of a uri only (anything after and including the '?'
 * character)
 *
 * @param {string} uri_query
 * @returns {Array}
 */
export function uriQueryParse(uri_query) {
    let query_object = [];

    uri_query.replace('?', '').split('&').forEach(function (val) {
        let split = val.split("=", 2);
        query_object[split[0]] = split[1];
    });

    return query_object;
}

/**
 * Updates a uri query string with new parameters.
 *
 * Pass in the uri query part of a uri only (anything after and including the '?'
 * character)
 *
 * @param {string} uri_query
 * @param {Object<string,string>} params
 * @returns {string}
 */
export function uriQueryUpdate(uri_query, params) {
    let current_params = uriQueryParse(uri_query);

    // Build url from params
    for (let param in params) {
        if (params.hasOwnProperty(param))
            current_params[param] = params[param];
    }

    // Return stringified uri query
    return uriQueryStringify(current_params);
}

/**
 * Parses an object (associative array) containing key/value pairs
 * into uri query format.
 *
 * @param {Object<string,string>} params
 * @returns {string}
 */
export function uriQueryStringify(params) {
    let uri_query = '?'; // Add params indicator

    // Build uri from params
    for (let param in params) {
        if (params.hasOwnProperty(param)) {
            // If value is array, put multiple values under same key with '[]' suffix to key
            if (Array.isArray(params[param])) {
                params[param].forEach(function(element, index) {
                    uri_query += param + '[' + index + ']=' + element + '&';
                });
            }
            // If object, build assosative array with '[property_name]' suffix to array key
            else if (typeof params[param] === 'object') {
                for (let object_property in params[param]) {
                    if (params[param].hasOwnProperty(object_property))
                        uri_query += param + '[' + object_property + ']=' + params[param][object_property] + '&';
                }
            }
            else
                uri_query += param + '=' + params[param] + '&';
        }
    }

    // Remove '&' off final param in string
    return uri_query.slice(0, uri_query.length - 1);
}

/**
 * Strips the query part of a uri. Anything after (and including)
 * the '?' character will be removed from the string.
 *
 * @param {string} uri
 * @returns {*}
 */
export function uriQueryStrip(uri) {
    let query_start_index = uri.indexOf('?');

    if (query_start_index > -1)
        uri = uri.slice(0, query_start_index);

    return uri;
}

UrlQueryParse.js

/**
 * URI Query Parse
 *
 * By Will Squire <will_squire@hotmail.co.uk>
 */

/**
 * Parses uri query string into a key/value
 * array.
 *
 * Takes the query part of a uri only (anything after and including the '?'
 * character)
 *
 * @param {string} uri_query
 * @returns {Array}
 */
function uriQueryParse(uri_query) {
    var query_object = [];

    uri_query.replace('?', '').split('&').forEach(function (val) {
        var split = val.split("=", 2);
        query_object[split[0]] = split[1];
    });

    return query_object;
}

/**
 * Updates a uri query string with new parameters.
 *
 * Pass in the uri query part of a uri only (anything after and including the '?'
 * character)
 *
 * @param {string} uri_query
 * @param {Object<string,string>} params
 * @returns {string}
 */
function uriQueryUpdate(uri_query, params) {
    var current_params = uriQueryParse(uri_query);

    // Build url from params
    for (var param in params) {
        if (params.hasOwnProperty(param))
            current_params[param] = params[param];
    }

    // Return stringified uri query
    return uriQueryStringify(current_params);
}

/**
 * Parses an object (associative array) containing key/value pairs
 * into uri query format.
 *
 * @param {Object<string,string>} params
 * @returns {string}
 */
function uriQueryStringify(params) {
    var uri_query = '?'; // Add params indicator

    // Build uri from params
    for (var param in params) {
        if (params.hasOwnProperty(param)) {
            // If value is array, put multiple values under same key with '[]' suffix to key
            if (Array.isArray(params[param])) {
                params[param].forEach(function(element, index) {
                    uri_query += param + '[' + index + ']=' + element + '&';
                });
            }
            // If object, build assosative array with '[property_name]' suffix to array key
            else if (typeof params[param] === 'object') {
                for (var object_property in params[param]) {
                    if (params[param].hasOwnProperty(object_property))
                        uri_query += param + '[' + object_property + ']=' + params[param][object_property] + '&';
                }
            }
            else
                uri_query += param + '=' + params[param] + '&';
        }
    }

    // Remove '&' off final param in string
    return uri_query.slice(0, uri_query.length - 1);
}

/**
 * Strips the query part of a uri. Anything after (and including)
 * the '?' character will be removed from the string.
 *
 * @param {string} uri
 * @returns {*}
 */
function uriQueryStrip(uri) {
    var query_start_index = uri.indexOf('?');

    if (query_start_index > -1)
        uri = uri.slice(0, query_start_index);

    return uri;
}