When i try to log mouse event i get lots of output but try to send to server it's a blank object?

Asked Jun 14 '16 at 23:09

Active Jun 14 '16 at 23:09

Viewed 460 times

I'm using javascript to send my server the entire 'mousemove' event. I can log the event but as soon as it reaches my server it just shows up as

{}

my code:

var socket = io();

window.addEventListener('mousemove', function(ev){
    console.log(ev);
    socket.emit('mousemove', ev);
}, true, true);

any help or direction is greatly appreciated.

asked Jun 14 '16 at 23:09

What about `console.log(JSON.stringify(ev));`? – zerkms Jun 14 '16 at 23:10
The only output I get is `{"isTrusted": true}` – David Diefenderfer Jun 14 '16 at 23:12
It is definitely not a mousemove event – zerkms Jun 14 '16 at 23:12
I get exactly what I want when I use `console.log(ev)` i it just turn to a blank object once i try to send it – David Diefenderfer Jun 14 '16 at 23:13
@DavidDiefenderfer That's because you can't send objects over the wire. Only strings. (That's why most people use JSON) – Madara's Ghost Jun 14 '16 at 23:16
But `socket.emit('mousemove', {mouse: 'moved', object: 'is working'});` works fine – David Diefenderfer Jun 14 '16 at 23:20
@DavidDiefenderfer so what have `console.log(JSON.stringify(ev));` exactly output? – zerkms Jun 14 '16 at 23:21
`{"isTrusted": true}` is actually the first property of the event object, so perhaps you have an issue on the server-side? – le_m Jun 14 '16 at 23:23
when I stringify the object I literally just get `{"isTrusted": true}` – David Diefenderfer Jun 14 '16 at 23:23
I thought so as well but that happens when I stringify in client – David Diefenderfer Jun 14 '16 at 23:23
1

Seems like serialisation algorithms (both JSON.serialise and socketio's) fail to serialise the object since it has references to DOM elements and circular references. – zerkms Jun 14 '16 at 23:25
See http://stackoverflow.com/questions/11547672/how-to-stringify-event-object – le_m Jun 14 '16 at 23:26

0 Answers0