JSFiddle - React, Tailwind, and code Playground
JavaScript
var x = 0;
if (window.location.search.indexOf('tumblrpage=') > -1) {
var url = $(location).attr('href');
url = url.split('=');
x = url[1] * 5 - 5;
currentpage = url[1];
} else {
currentpage = 1;
}