Get a variable from the URL parameters, similar to PHP $_GET

getQueryVariable.js

function getQueryVariable(variable) {
  var svalue = location.search.match(
    new RegExp("[?&]" + variable + "=([^&]*)(&?)", "i")
  );
  return svalue ? svalue[1] : svalue;
}
// ?page=1
getQueryVariable("page"); // 1


// courtesy: https://css-tricks.com/snippets/javascript/get-url-variables/#comment-63646