.block {
color: #fff;
.title {
color: #fff;
}
header &, footer & {
color: #000;
.title {
color: #000;
}
}
}<link rel="stylesheet" href="style.css?v=1" /><link rel="stylesheet" href="style.css?v=2" />
var html =
'<div class="entry">' +
'<h1>{{title}}</h1>' +
'<div class="body">' +
'{{body}}' +
'</div>' +
'</div>';
var title = "Vasya";
var body = "Pupkin";
var result = html.replace("{{title}}", title);
result = result.replace("{{body}}", body);
console.log(result);