Sometimes, we want to detect Ctrl+V, Ctrl+C using JavaScript.
In this article, we’ll look at how to detect Ctrl+V, Ctrl+C using JavaScript.
How to detect Ctrl+V, Ctrl+C using JavaScript?
To detect Ctrl+V, Ctrl+C using JavaScript, we can listen to the keyup and keydown events.
For instance, we write
let ctrlActive = false;
let cActive = false;
let vActive = false;
document.body.addEventListener("keyup", (event) => {
if (event.key == "Control") ctrlActive = false;
if (event.code == "KeyC") cActive = false;
if (event.code == "KeyV") vActive = false;
});
document.body.addEventListener("keydown", (event) => {
if (event.key == "Control") ctrlActive = true;
if (ctrlActive == true && event.code == "KeyC") {
event.preventDefault();
//...
}
if (ctrlActive == true && event.code == "KeyV") {
event.preventDefault();
//...
}
});
to call addEventListener to listen for the keyup and keydown events.
Then we check the keys that are pressed with key and code in the keyup event listeners to set a few flags.
In the keydown listener, we check if ctrl is pressed with ctrlActive and check the key pressed with event.code.
If they’re both pressed, then the key combos are pressed.
Conclusion
To detect Ctrl+V, Ctrl+C using JavaScript, we can listen to the keyup and keydown events.
