JS: Get and Set HashTag Parameter

gistfile1.js

$.getHashtagParam = function(paramToRetrieve: string): string {
  var params = (document.URL.split("#")[1] || "").split("&");

	var paramsCount = params.length;

	for (var paramIndex = 0; paramIndex < paramsCount; paramIndex = paramIndex + 1) {
		var singleParam = params[paramIndex].split("=");
		if (singleParam[0] === paramToRetrieve) {
			return singleParam[1];
		}
	}
}

$.setHashtagParam = function(paramToSet: string, value: string): void {
	var hashtag = document.location.hash.split("#")[1];
	var params = hashtag ? hashtag.split("&") : [];
	
	var paramsCount = params.length;
	var paramFound = false;

	for (var paramIndex = 0; paramIndex < paramsCount; paramIndex = paramIndex + 1) {
		var singleParam = params[paramIndex].split("=");
		if (singleParam[0] === paramToSet) {
			params[paramIndex] = singleParam[0].concat("=", value);
			paramFound = true;
		}
	}

	if (!paramFound) {
		params.push(paramToSet.concat("=", value));
	}

	document.location.hash = params.join('&');
}