Question

Hello I have a pretty basic question about events in JS.

Can I do something like:

var myobj = { };
document.getElementById("myid").onmousemove = function (e) {
  myobj.e = e;
}

...

// called from function which will occure after onmousemove guaranteed
document.getElementById("info").innerHTML = myobj.e.type;

I need this for my game. I want to save event data and dispatch it later in update function of my game loop.

Okay. Here is jsfiddle.

<p id="info"></p><canvas id="can" width="400px" height="400px" style="border: 2px solid red"></canvas>

var my = { };
document.getElementById("can").onclick = function(e, custom) {
    my.e = e;
}
document.getElementById("can").onmouseover = function(e, custom) {
    my.e = e;
}
document.getElementById("can").onmouseout = function(e, custom) {
    my.e = e;
}
document.getElementById("can").oncontextmenu = function(e, custom) {
    my.e = e;
}
document.getElementById("info").innerHTML = my.e.type;

http://jsfiddle.net/cMPSS/3/

And it doesnt work.

Answer 1

Yes, you could do something like this

var myEvents = [];
var myDiv = document.getElementById("myDiv");
var infoDiv = document.getElementById("info");

function logEvent(e)
{
    e.preventDefault(); // prevent default behaviour if needed
    myEvents.push(e); // Store event info
}

myDiv.onmousemove = myDiv.onmousedown = myDiv.onmouseup = logEvent; 

// Set a timer for looping through the events
gameTimer = setInterval(function() {
    // Loop through events
    while (myEvents.length>0)
    {
        ev = myEvents.shift();
        // Display event info
        infoDiv.innerHTML = ev.type + " " + infoDiv.innerHTML; 
    }
}, 100)​
​

DEMO