neat href tricks

href.js

// example window url: http://test.dev/stuff

var query = 'poop=butts&farts=smellz';
var parser = document.createElement('a'); // create anonymous 'a' tag

parser.href = window.location.href;
parser.search = query;

console.log(parser.href);
// ^ should output: http://test.dev/stuff?poop=butts&farts=smellz

parser.pathname += '.json';
console.log(parser.href);
// ^ should output: http://test.dev/stuff.json?poop=butts&farts=smellz