How can I catch 2+ key presses at once?

Question

Well lately i got interested in creating JS games. (not an area i have experience with but it interests me). i know there are several gaming engines for JS out there but i dont really want to create a game. rather i am curious on how things work / how can i create one. I have several questions: Anyone with suggestions on where can I read about it? Prerequisite (what knowledge is needed). I tried making a small game of something walking in a rectangular. By binding keyup to the window and checking the `event.which` to get the key that was pressed. I realized that if i clicked on 2 buttons same time only 1 of them is being registered. how can i overcome that? ``` $(window).keyup(function(event){ globalEvent = event.which; }); ```

Accepted Answer

To directly answer your second question.

Here is one way:

```
var keyPressed = {};

$(window).keydown(function(e) {
    keyPressed[e.which] = true;
}).keyup(function(e) {
    keyPressed[e.which] = false;
});
```

Now you can use `keyPressed` whenever you want to determine if a key is down:

```
// wherever
var key1 = 65, key2 = 66; // A and B
if (keyPressed[key1] && keyPressed[key2]) {
    // A and B are both being pressed.
}
```

How can I catch 2+ key presses at once?

Solution

Problem

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