Waits for the app to be ready, including the YUI instance to notify back that the ready state of the app was reached by calling the callback. The ready state is bound to the locator instance mounted into the express app thru app.set('locator', locator); and depending on app.get('locator').ready.then() promise result, the ready state will be reached or not.

app.yui.ready(function (err) {
    if (err) {
        throw err;
    }
    // do something!
});

Create a synthetic group off the bundle renference to register its modules into the server and/or client Y instance so they can be used thru app.yui.use().

Creates a YUI Instance, and wraps the call to Y.require() to work appropiatly on the server side. The require method can be called once the ready state is achieved thru app.yui.ready().

app.yui.ready(function (err) {
    if (err) {
        throw err;
    }
    app.yui.require('json-stringify', function (Y, imports) {
        Y.JSON.stringify({ entry: 'value' });
    });
});

Creates a YUI Instance, and wraps the call to Y.use() to work appropiatly on the server side. The use method can be called once the ready state is achieved thru app.yui.ready().

app.yui.ready(function (err) {
    if (err) {
        throw err;
    }
    app.yui.use('json-stringify', function (Y) {
        Y.JSON.stringify({ entry: 'value' });
    });
});