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keydown or keyup event to check character

Tired Turtle on May 03, 2021

function isCharacterKeyPress(evt) {
    if (typeof evt.which == "undefined") {
        // This is IE, which only fires keypress events for printable keys
        return true;
    } else if (typeof evt.which == "number" && evt.which > 0) {
        // In other browsers except old versions of WebKit, evt.which is
        // only greater than zero if the keypress is a printable key.
        // We need to filter out backspace and ctrl/alt/meta key combinations
        return !evt.ctrlKey && !evt.metaKey && !evt.altKey && evt.which != 8;
    }
    return false;
}

<input type="text" onkeypress="alert(isCharacterKeyPress(event))">

Source: stackoverflow.com

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"keydown or keyup event to check character" Code Answer's