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var isDevToolsOpen = false;
setInterval(function() {
    if (window.outerWidth - window.innerWidth > 160) {
        // Developer tools may be open
        isDevToolsOpen = true;
    } else {
        // Developer tools are likely closed
        isDevToolsOpen = false;
    }

    if (isDevToolsOpen) {
        console.log('Developer tools may be open.');
    } else {
        console.log('Developer tools are likely closed.');
    }
}, 1000);