View difference between Paste ID: fnknYCsx and CnDvQB06

 function solve() {
     let buttonElement = document.querySelector('#container button');
     let inputElements = Array.from(document.querySelectorAll('#container input'));
     let [nameElement, ageElement, kindElement, ownerElement] = inputElements;
     let adoptionUlElement = document.querySelector('#adoption ul');
     let adoptedUlElement = document.querySelector('#adopted ul');
 
     buttonElement.addEventListener('click', e => {
         e.preventDefault();
 
         if (!inputElements.every(x => x.value)) {
             return;
         }
 
         if (!Number(ageElement.value)) { // What if cat is 0 year old?
             return;
         }
 
         // Create list item
         let liElement = document.createElement('li');
         let pElement = document.createElement('p');
         let spanElement = document.createElement('span');
         let petButtonElement = document.createElement('button');
 
         pElement.innerHTML = `<strong>${nameElement.value}</strong> is a <strong>${ageElement.value}</strong> year old <strong>${kindElement.value}</strong>`;
         spanElement.textContent = `Owner: ${ownerElement.value}`;
         petButtonElement.textContent = `Contact with owner`;
 
         liElement.appendChild(pElement);
         liElement.appendChild(spanElement);
         liElement.appendChild(petButtonElement);
 
         // Add list item to #adoption
         adoptionUlElement.appendChild(liElement);
 
         // clear all input fields
         nameElement.value = '';
         ageElement.value = '';
         kindElement.value = '';
         ownerElement.value = '';
 
         // Attach event handler
         petButtonElement.addEventListener('click', petButtonClick);
     });
 
     function petButtonClick(e) {
         let parent = e.currentTarget.parentElement;
 
         e.currentTarget.remove();
 
         let divElement = document.createElement('div');
         let inputElement = document.createElement('input');
         let takeItButtonElement = document.createElement('button');
 
         inputElement.setAttribute('placeholder', 'Enter your names');
         takeItButtonElement.textContent = 'Yes! I take it!';
 
         divElement.appendChild(inputElement);
         divElement.appendChild(takeItButtonElement);
 
         parent.appendChild(divElement);
 
         takeItButtonElement.addEventListener('click', onTakeItButtonClick);
     }
 
     function onTakeItButtonClick(e) {
         let parentButtonElement = e.currentTarget.parentElement
         let liElement = parentButtonElement.parentElement;
 
         let newOwnerInputElement = liElement.querySelector('input');
         let ownerNameSpanElement = liElement.querySelector('span');
 
         let newOwnerName = newOwnerInputElement.value;
 
         if (!newOwnerName) {
             return;
         }
 
         ownerNameSpanElement.textContent = `New Owner: ${newOwnerName}`;
 
         adoptedUlElement.appendChild(liElement);
 
         parentButtonElement.remove();
 
         let checkedButtonElement = document.createElement('button');
         checkedButtonElement.textContent = 'Checked';
 
         liElement.appendChild(checkedButtonElement);
 
         checkedButtonElement.addEventListener('click', e => {
             // liElement.remove();
             e.currentTarget.parentElement.remove();
         });
     }
 }