Using addKeyListener to bind keys Javascript

问题:

I'm making a small game for a class and I am having trouble finding a way to bind keys to functions. One solution I found was using addEventListener, however I cannot find a way to take the key value and bind it to an animation.

document.addEventListener("keydown", function(event){
if(event.which === 65) {
    $("#player").animate({left: '5px'});
}
});

回答1:

var x = event.which || event.keyCode;  // Use either which or keyCode, depending on browser support

回答2:

Try to do it in jQuery way.

  jsfiddle.net/jpmvkqzh/

position.left of element keep increasing 5px when user pressing right arrow key and deceasing 5px when user pressing left arrow key.

.stop() is to stop the currently-running animation on the matched elements.