how to override the default cmd shortcut key in ubuntu using javascript

Question

command + C in my application I want to open the menu button. By default command key executed behalf of command + c. How to override the command key

Answer 1

You can prevent the default key combination action to be executed using the preventDefault function:

function KeyPress(e) {
    e.preventDefault();
    var evtobj = window.event ? event : e;
    if (evtobj.keyCode == 80 && evtobj.ctrlKey) {
        console.log("Key combination: Ctrl + p");
    }
}

document.onkeydown = KeyPress;

The document.onkeydown sentence is adding the event function to all the document, so it will be triggered when any element in the website is selected/focused.

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Unfortunately, like is answered in this post How does one capture a Mac's command key via JavaScript?, there is not an standard key code for the iOS command key, and it is browser dependant:

• Firefox: 224
• Opera: 17
• WebKit browsers (Safari/Chrome): 91 (Left Command) or 93 (Right Command)

You can check the key codes here: https://keycode.info/