'); WinPrint.document.close(); WinPrint.focus(); WinPrint.print(); WinPrint.close(); } function setBrightness(value) { let back = $('.post-content').css('background-color'); var alpha = parseFloat(back.split(',')[3]) + value; if (alpha <= 0.9) $('.post-content').css('background-color', `rgba(0,0,0,${alpha})`); }