使用JavaScript动态添加/删除表行

Question

我正在尝试按照此示例和此示例添加/删除表行.

这是我的代码:

HTML表单

<div id="POItablediv">
    <input type="button" id="addPOIbutton" value="Add POIs"/><br/><br/>
    <table id="POITable" border="1">
        <tr>
            <td>POI</td>
            <td>Latitude</td>
            <td>Longitude</td>
            <td>Delete?</td>
            <td>Add Rows?</td>
        </tr>
        <tr>
            <td>1</td>
            <td><input size=25 type="text" id="latbox" readonly=true/></td>
            <td><input size=25 type="text" id="lngbox" readonly=true/></td>
            <td><input type="button" id="delPOIbutton" value="Delete" onclick="deleteRow(this)"/></td>
            <td><input type="button" id="addmorePOIbutton" value="Add More POIs" onclick="insRow()"/></td>
        </tr>
    </table>
</div>

JavaScript的

function deleteRow(row)
{
    var i=row.parentNode.parentNode.rowIndex;
    document.getElementById('POITable').deleteRow(i);
}


function insRow()
{
    var x=document.getElementById('POITable').insertRow(1);
    var c1=x.insertCell(0);
    var c2=x.insertCell(1);
    c1.innerHTML="NEW CELL1";
    c2.innerHTML="NEW CELL2";
}

现在,正如您所看到的,在我的表格中,我有文本字段和按钮.我想要的是:

1. 只是为了重复行的结构.我现在不能这样做,因为innerHTM只需要文本.如何插入文本字段或标签？

2. 文本字段的ID也应该不同,因为我稍后会检索这些值以将其放入数据库中.

3. 我想提出一个函数来增加POI的数量

有人可以帮帮我吗？

Answer 1

您可以只克隆具有输入的第一行,然后获取嵌套输入并更新其ID以添加行号(并对第一个单元格执行相同操作).

function deleteRow(row)
{
    var i=row.parentNode.parentNode.rowIndex;
    document.getElementById('POITable').deleteRow(i);
}


function insRow()
{
    var x=document.getElementById('POITable');
       // deep clone the targeted row
    var new_row = x.rows[1].cloneNode(true);
       // get the total number of rows
    var len = x.rows.length;
       // set the innerHTML of the first row 
    new_row.cells[0].innerHTML = len;

       // grab the input from the first cell and update its ID and value
    var inp1 = new_row.cells[1].getElementsByTagName('input')[0];
    inp1.id += len;
    inp1.value = '';

       // grab the input from the first cell and update its ID and value
    var inp2 = new_row.cells[2].getElementsByTagName('input')[0];
    inp2.id += len;
    inp2.value = '';

       // append the new row to the table
    x.appendChild( new_row );
}

演示如下

function deleteRow(row) {
  var i = row.parentNode.parentNode.rowIndex;
  document.getElementById('POITable').deleteRow(i);
}


function insRow() {
  console.log('hi');
  var x = document.getElementById('POITable');
  var new_row = x.rows[1].cloneNode(true);
  var len = x.rows.length;
  new_row.cells[0].innerHTML = len;

  var inp1 = new_row.cells[1].getElementsByTagName('input')[0];
  inp1.id += len;
  inp1.value = '';
  var inp2 = new_row.cells[2].getElementsByTagName('input')[0];
  inp2.id += len;
  inp2.value = '';
  x.appendChild(new_row);
}

<div id="POItablediv">
  <input type="button" id="addPOIbutton" value="Add POIs" /><br/><br/>
  <table id="POITable" border="1">
    <tr>
      <td>POI</td>
      <td>Latitude</td>
      <td>Longitude</td>
      <td>Delete?</td>
      <td>Add Rows?</td>
    </tr>
    <tr>
      <td>1</td>
      <td><input size=25 type="text" id="latbox" /></td>
      <td><input size=25 type="text" id="lngbox" readonly=true/></td>
      <td><input type="button" id="delPOIbutton" value="Delete" onclick="deleteRow(this)" /></td>
      <td><input type="button" id="addmorePOIbutton" value="Add More POIs" onclick="insRow()" /></td>
    </tr>
  </table>