[рони]

nastya97core,

<script>
var line = `.head-line {
font-size: 24px;
color: #000000;
width: 600px;
height: 400px;
background-color: #BDB76B;
}`;
line = line.replace(/(\d+)px/g, (a,b) => `${(b / 12.8).toFixed(3)}vw`);
document.write(line)

</script>