in js/app.js [8:22]
(function(){
function loadApiRootFromInput(){
var apiRoot = $('#api-root input').val();
window.location.search = apiRoot;
}
$('#api-root button').on('click',loadApiRootFromInput);
$('#api-root input').on('keyup',function(){
if(event.keyCode == ENTER_KEY){
loadApiRootFromInput();
}
});
})();