$promise for a piped POST

promise-pipe-post

var asking = new $.Deferred();

var feedback = asking.pipe(function (res) {
    console.log('Sending:', res);
    return $.post('/echo/json', res);
});

// Simulate form submit... 
asking.resolve('my details');

asking.done(function () {
    console.log('--- show loading...');
});

feedback.then(function () {
    console.log('--- SUCCESS! Remove loading...');
}, function () {
    console.log('Error');
});