Function AppFocusHandler

frontend/app/app.tsx:183–205

()

}

function AppFocusHandler() {
    return null;

    // for debugging
    useEffect(() => {
        document.addEventListener("focusin", appFocusIn);
        document.addEventListener("focusout", appFocusOut);
        document.addEventListener("selectionchange", appSelectionChange);
        const ivId = setInterval(() => {
            const activeElement = document.activeElement;
            if (activeElement instanceof HTMLElement) {
                focusLog("activeElement", getElemAsStr(activeElement));
            }
        }, 2000);
        return () => {
            document.removeEventListener("focusin", appFocusIn);
            document.removeEventListener("focusout", appFocusOut);
            document.removeEventListener("selectionchange", appSelectionChange);
            clearInterval(ivId);
        };
    });
    return null;
}

const MacOSFirstClickHandler = () => {
    useEffect(() => {