Check on keycode return undefined

Question

The code below is supposed to click a button when the Enter key is pressed and empty another textbox if any other key is clicked.

I'm unable to check the keycode as keycode is always undefined.

$('#txtSearch').keyup(function (e) {
    if (e.keycode != 13)
        $('#txtId').val("");
    else
        $('#BtnGo').click();
})

this will help you http://stackoverflow.com/questions/302122/jquery-event-keypress-which-key-was-pressed?answertab=active#tab-top — Parth Trivedi, Dec 16 '15 at 16:39
Note it's `keyCode` - case sensitivity. Also you should probably use `e.which` for full cross browser support: `if ((e.which || e.keyCode) != 13)` — Rory McCrossan, Dec 16 '15 at 16:39
@closevoter, would you please tell me why it's not a programming question ? — user3340627, Dec 16 '15 at 16:43

Scarecrow · Accepted Answer · 2015-12-16T16:50:28.507

In Firefox, the keyCode property does not work on the onkeypress event (will only return 0). For a cross-browser solution, use the which property together with keyCode, e.g:

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

So use following code

$('#txtSearch').keyup(function (event) {
    var x = event.which || event.keyCode;  // Use either which or keyCode, depending on browser support

        if (x!= 13)
            $('#txtId').val("");
        else
            $('#BtnGo').click();
    })

http://www.w3schools.com/jsref/event_key_keycode.asp

score 1 · Answer 2 · answered Dec 16 '15 at 16:43

1

Better way to do this

$('#txtSearch').keyup(function (e) {
    var code = e.keyCode || e.which;
    if(code != 13)
        $('#txtId').val("");

   else
        $('#BtnGo').click();
})

answered Dec 16 '15 at 16:43

Parth Trivedi

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Check on keycode return undefined

2 Answers2