Function _rusenseTabVisible

web/scripts/ragnar_modern.js:996–998

()

        if (!obs) return;
        const expanded = obs.classList.toggle('observatory-fullscreen');
        if (expanded) {
            const req = obs.requestFullscreen || obs.webkitRequestFullscreen;
            if (req) Promise.resolve(req.call(obs)).catch(() => { /* CSS overlay still applies */ });
        } else {
            const exit = document.exitFullscreen || document.webkitExitFullscreen;
            if (exit && (document.fullscreenElement || document.webkitFullscreenElement)) {