I see some similar questions here (like JavaScript: Check if CTRL button was pressed ) but my problem is actually the event triggering. My js code:
// Listen to keyboard.
window.onkeypress = listenToTheKey;
window.onkeyup = listenToKeyUp;
/*
Gets the key pressed and send a request to the associated function
@input key
*/
function listenToTheKey(e)
{
if (editFlag == 0)
{
// If delete key is pressed calls delete
if (e.keyCode == 46)
deleteNode();
// If insert key is pressed calls add blank
if (e.keyCode == 45)
createBlank();
if (e.keyCode == 17)
ctrlFlag = 1;
}
}
The event triggers for any other keys except the ctrl .
I need to also trigger it for ctrl .
I can't use jQuery/prototype/whatever so those solutions are not acceptable.
So... how can I detect the ctrl ?
Try using if (e.ctrlKey)
.
Using onkeydown rather than onkeypress may help.
From http://www.w3schools.com/jsref/event_onkeypress.asp
Note: The onkeypress event is not fired for all keys (eg ALT, CTRL, SHIFT, ESC) in all browsers. To detect only whether the user has pressed a key, use the onkeydown event instead, because it works for all keys.
Your event has a property named ctrlKey. You can check this to look if the key was pressed or not. See snippet below for more control like keys.
function detectspecialkeys(e){
var evtobj=window.event? event : e
if (evtobj.altKey || evtobj.ctrlKey || evtobj.shiftKey)
alert("you pressed one of the 'Alt', 'Ctrl', or 'Shift' keys")
}
document.onkeypress=detectspecialkeys
This is basically Rick Hoving's answer, but it uses keydown
like Danielle Cerisier suggests
function detectspecialkeys(e) { var evtobj = window.event ? event : e if (evtobj.ctrlKey) console.log("You pressed ctrl") } document.onkeydown = detectspecialkeys
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