ladybird/Tests/LibWeb/Text/input/UIEvents/KeyEvent-keypress.html

<input id="input" />
<script src="../include.js"></script>
<script>
    test(() => {
        let input = document.getElementById("input");

        const modifierKeys = ['Alt', 'Control', 'Shift', 'Super', 'NumLock'];
        input.addEventListener("keydown", e => {
            const activeModifiers = modifierKeys.filter(modifier => e.getModifierState(modifier));
            if (activeModifiers.length > 0) {
                  println(`keydown key=${e.key} charCode=${e.charCode} modifiers=${activeModifiers.join(', ')}`);
            } else {
                  println(`keydown key=${e.key} charCode=${e.charCode}`);
            }
        });
        input.addEventListener("keypress", e => {
            const activeModifiers = modifierKeys.filter(modifier => e.getModifierState(modifier));
            if (activeModifiers.length > 0) {
                println(`keypress key=${e.key} charCode=${e.charCode} modifiers=${activeModifiers.join(', ')}`);
            } else {
                println(`keypress key=${e.key} charCode=${e.charCode}`);
            }
        });

        internals.sendText(input, "A");
        internals.sendKey(input, "LeftShift");
        internals.sendText(input, "B");

        internals.sendKey(input, "Return");

        let modifiers = 1 << 0; // Mod_Alt
        internals.sendKey(input, "Return", modifiers);
        modifiers = 1 << 1; // Mod_Ctrl
        internals.sendKey(input, "Return", modifiers);
        modifiers = 1 << 2; // Mod_Shift
        internals.sendKey(input, "Return", modifiers);
        modifiers = 1 << 3; // Mod_Super
        internals.sendKey(input, "Return", modifiers);
        modifiers = 1 << 4; // Mod_Keypad
        internals.sendKey(input, "Return", modifiers);
    });
</script>