在做一個button按鈕的添加功能，添加內容如下         function addItem() {             $("#addItemBtn").before("<li>" +                 "<div class= " + "item-content" + " >" +                     "<div class=" + "item-inner" + ">" +                         "<div class=" + "item-title label" + ">"+                             "<i class="+"fa fa-minus-circle"+" style="+"font-size:1rem;margin-left:1rem;color:red" +"></i>"+                         "</div > " +                         "<div class="+"item-input"+">"+                             "<input type="+"text " +"placeholder="+"點擊輸入投票問題" +" />"+                         "</div>"+                     "</div>"+                 "</div >"+              "</li >")          }在div class=item-title label和 i class=fa fa-minus-circle這兩處應該怎么處理直接用空格的話在瀏覽器中跑到了引號外面