Добавил фильтр

public/index.js

@@ -0,0 +1,14 @@
+const slider = document.getElementById('minDifference')
+
+slider.addEventListener('input', function (event) {
+  const table = document.getElementById('items')
+  Array.from(table.children).forEach(row => {
+    if (row.dataset.difference < Number(event.target.value)) {
+      row.style.display = 'none'
+    } else {
+      row.style.display = 'table-row'
+    }
+  })
+
+  document.getElementById('filterValue').innerText = event.target.value
+})

public/style.css

@@ -16,10 +16,6 @@ tr {
   text-align: left;
 }
 
-tr:nth-child(even) {
-  background: rgb(240, 242, 243);
-}
-
 td {
   padding: 2px 16px;
 }