http://www.perlmonks.org?node_id=11114417


in reply to Mojolicious waiting page

Here's one way, with AJAX:

Update: To clarify, this mainly shows how to do the form submission asynchronously - you can always modify this code so that it, for example, redirects to a different page when the form submission is complete, to show a "spinner" image instead of the "Submitting" message, and so on. /Update

#!/usr/bin/env perl use Mojolicious::Lite -signatures; get '/' => sub ($c) { $c->render(template => 'index'); } => 'index'; post '/submit' => sub ($c) { $c->render_later; Mojo::IOLoop->timer(10 => sub { # simulate long process if ( $c->param('foo') =~ /foo/i ) { $c->render(json => { ok=>1, message=>"All good" }); } else { $c->render(json => { ok=>0, message=>"Bad foo value" }); } }); } => 'formsubmit'; app->start; __DATA__ @@ layouts/main.html.ep <!DOCTYPE html> <html> <head><title><%= title %></title></head> <body> %= content </body> </html> @@ index.html.ep % layout 'main', title => 'Hello, World!'; <div> %= form_for formsubmit => ( method=>'post', id=>'myform' ) => begin <div> %= label_for foo => 'Foo' %= text_field foo => ( placeholder=>"Foo", required=>'required' ) (must contain "foo") </div><div> %= label_for bar => 'Bar' %= text_field bar => ( placeholder=>"Bar" ) </div><div> %= submit_button 'Login' <span id="formmessage"></span> </div> %= end </div> <script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script> <script> $(function () { $('#myform').on('submit', function (e) { e.preventDefault(); var thedata = $('#myform').serialize(); // before disabling! $("#formmessage").text("Submitting, please wait..."); $("#myform :input").prop("disabled", true); $.ajax({ type: 'post', url: '<%= url_for 'formsubmit' %>', data: thedata, timeout: 120*1000 }) .done( function( data ) { if (data.ok) { alert("Form was submitted: "+data.message); } else { alert("Problem with submission: "+data.message); } }) .fail( function( jqXHR, textStatus, errorThrown ) { alert("Form submission error: "+textStatus +" / "+jqXHR.status+" "+errorThrown); }) .always( function () { $("#formmessage").text(""); $("#myform :input").prop("disabled", false); }); }); }); </script>