View difference between Paste ID: grNDcvmK and 6Litx1x5

 (() => {
 
     const BASE_URL = "https://judgetests.firebaseio.com/locations.json";
     let TODAY_URL = "https://judgetests.firebaseio.com/forecast/today/{code}.json";
 
     const elements = {
         locationInput: document.querySelector("#location"),
         button: document.querySelector("#submit"),
         notificationHeading: document.querySelector('h1.notification')
     };
 
     const errorHandler = (e) => {
         console.dir(e);
         elements.notificationHeading.textContent = e.message;
     };
 
     const jsonMiddleware = (r) => r.json();
 
     elements.button.addEventListener("click", getLocationValue);
 
     function getLocationValue() {
 
         const location = elements.locationInput.value;
 
         fetch(BASE_URL)
             .then(jsonMiddleware)
             .then((data) => {
                 const { name, code } = data.find((o) => o.name === location);
 
                 TODAY_URL = TODAY_URL.replace('{code}', code);
 
                 fetch(TODAY_URL)
                     .then(jsonMiddleware)
                     .then((data) => {
                         console.log(data);
                     })
                     .catch(errorHandler)
             })
             .catch(errorHandler)
     }
 })();