Add/update or Remove URL parameters from the provided URL

getUrlWithParams.js

/* getUrlWithParams()
* Add/update or remove url parameters from the provided url.
* Example: getUrlWithParams({'tab':tab_name},['remove']);
*/
var getUrlWithParams = function(url, add_update, remove = []) {
	var url = new URL(url);

	var splita = url.search.substr(1).split('&');
	var params = {};
	var merged = {};
	for(var i in splita) {
		var splitb = splita[i].split('=');
		params[splitb[0]] = splitb[1];
	}
	for(var i in params) {
		if(Array.isArray(remove) && remove.indexOf(i) == -1) {
			merged[i] = params[i];
		}
	}
	for(var i in add_update) {
		merged[i] = add_update[i];
	}

	output = url.origin + url.pathname + (merged.length > 0 ? '?' : '');

	var cnt = 0;
	for(var i in merged) {
		if(i != '') {
			output += (cnt == 0 ? '?' : '&') + i +'='+ merged[i];
			cnt++;
		}
	}
	return output + url.hash;
};