键盘顺序以单击按钮

Question

I would like a system administrator to easily create new accounts in an application. I was thinking keys alt and shift would trigger the "Create New User" button or defaultButton2 in my application. I can get one key to work, but combining both keys doesn't seem to work.

$(document).ready(function () {
  $("input").bind("keydown", function (event) {
    var keycode = (event.keyCode ? event.keyCode : 
          (event.which ? event.which : event.charCode));
    if (keycode == 16 && keycode == 18) {
        document.getElementById('defaultButton2').click();
        return false;
    } else {
        return true;
    }
  });
});

Answer 1

The keydown event ( mdn ) has booleans for the shiftkey, altkey and control key to detect when combinations of buttons are pressed. You can therefore just check those. The keyCode is only for the last key pressed.

If you want to detect other keys, eg if "a" and "s" are pressed at the same time, you need to mess around with custom keydown and keyup events and track things yourself.

 $('body').on( 'keydown', function(e) { if( e.altKey && e.shiftKey ) { console.log( "Both pressed!" ); } } ); 

 body { background-color: #DDDDDD; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> Click Here 

Answer 2

You almost did it right...

$(document).ready(function(){
  $("input").keydown(function(e) {
    // 18 is the key for alt
    if(e.keyCode == 18 && e.shiftKey) {
        $("button").click();
    }
  });
});

Here is a working JSFiddle and if you're looking for the JS keycodes have a look here .