javascript - 从输入值创建 li 元素

Question

<分区>

Answer 1

$(document).on('click','#create',function() {
  var liNum = $('#liNum').val();
  if (liNum && !isNaN(liNum)) {
    var ul = document.createElement('ul');
    for(var i = 0;i < liNum; i++) {
      var li = document.createElement('li');
      li.innerHTML = "List item #" + i;
      ul.appendChild(li);
    }
    document.body.appendChild(ul);
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<input id="liNum" type="number" />
<button id="create">Create list</button>