function beforePrint() {
    console.log('Do something special before print');
}

function afterPrint() {
    console.log('Do something after print');
}

if (window.matchMedia) {
    window.matchMedia('print').addListener(function (mql) {
        if (mql.matches) {
            beforePrint();
        }
        else {
            afterPrint();
        }
    });
}
// For IE, does not attach in browsers that do not support these events
window.addEventListener('beforeprint', beforePrint, false);
window.addEventListener('afterprint', afterPrint, false);