templateLiterals.js

// With ES6 Template Literals
data.items.forEach(function (item) {
  itemList = itemList.add(`<li><strong><a href='/items/${item['id']}'>${item['name']}</a></strong>
    <ul>
      <li>Rating: ${item['rating']}</li>
      <li>Notes: ${item['notes']}</li>
    </ul>`
  )
})

// With newline slashes
data.items.forEach(function (item) {
  itemList = itemList.add('<li><strong><a href="/items/' + item['id'] + '">' + item['name'] + '</a></strong> \
    <ul> \
      <li>Rating: ' + item['rating'] + '</li> \
      <li>Notes: ' + item['notes'] + '</li> \
    </ul>'
  )
})

// Concatenation
data.items.forEach(function (item) {
  itemList = itemList.add('<li><strong><a href="/items/' + item['id'] + '">' + item['name'] + '</a></strong>' +
    '<ul>' +
      '<li>Rating: ' + item['rating'] + '</li>' +
      '<li>Notes: ' + item['notes'] + '</li>' +
    '</ul>'
  )
})