JSFiddle - React, Tailwind, and code Playground

HTML

<div class="switch"> Background changes upon the window location. </div>

JavaScript

var winLoc = "?rent_rooms=1234&search_rooms=";
  //this is for jsFiddle purposes
  //you'll replace the above with 'window.location.search'
winLoc = winLoc.replace('?', '').split('&');

var  ourStr = winLoc[1].replace('=', '');

switch(ourStr){
  case 'search_rooms':
    $('.switch').css('backgroundColor', 'red');
    break;
  case 'search_housing':
    $('.switch').css('backgroundColor', 'blue');
    break;        
}