@media print {
    /* Hide all elements in the body by default */
    body * {
        visibility: hidden !important;
        display: none !important; /* using display: none ensures no space is taken up */
    }

    /* Make the target div and all its children visible and display as a block */
    #printThis, #printThis * {
        visibility: visible !important;
        display: block !important;
    }

    /* Optional: position the printable content at the top left of the page */
    #printThis {
        position: absolute !important;
        left: 0;
        top: 0;
        width: 100%;
    }
}