Add script //cdn.rawgit.com/finagin/Slavunya.js/v1.1.2/dist/Slavunya.min.js to your code
<body>
    <div class="content">...</div>
    <script src="//cdn.rawgit.com/finagin/Slavunya.js/v1.1.2/dist/Slavunya.min.js"></script>
    <script src="/main.min.js"></script>
</body>> Slavunya.cookies("page")
< 2
> Slavunya.cookies("page", 3, 7)
< undefined
> Slavunya.cookies("page")
< 3> Slavunya.math(2).in(1,2,3)
< true
> Slavunya.math(4).in(1,2,3)
< false
> Slavunya.math(2).in([1, 2, 3])
< true> Slavunya.math(5).between(1, 10)
< true
> Slavunya.math(15).between(1, 10)
< false> Slavunya.math(12345).right(1);
< 5
> Slavunya.math(12345).right(2);
< 45> Slavunya.math(3).declination(["день", "дня", "дней"])
< "дня"
> Slavunya.math(11).declination(["неделя", "недели", "недель"])
< "дней"
> Slavunya.math(21).declination(["месяц", "месяца", "месяцев"])
< "месяцев"/index.html?page=2&guest#block=about
> Slavunya.urlParams("page");
< 2
> Slavunya.urlParams("block");
< "about"
> Slavunya.urlParams();
< {
      page: 2,
      guest: true,
      block: "about"
  }> Slavunya.defaults({
      name:"Igor",
      age: 22,
      city: "Kazan"
  }, {
      country: "Russia",
      city: "Moscow"
  })
< {
      name:"Igor",
      age: 22,
      country: "Russia",
      city: "Kazan"
  }> Slavunya.getRGB("#E6AC0C")
< [230, 172, 12]> Slavunya.toCamelCase("to-camel-case")
< toCamelCase
> Slavunya.toCamelCase("TO-CAMEL-CASE", true)
< toCamelCase