js操作table中tr的顺序实现上移下移一行的效果

总体思路是在table外部加个div，修改div的innerHtml实现改变tr顺序的效果

具体思路是

获取当前要移动tr行的rowIndex，在table中删除掉，然后循环table的rows，到了目标行再直接加进去，最后把整体的html赋值给div完成效果

js代码如下

 //使行向上一行
    function setRowUp(obj) {
      if (obj.parentNode.parentNode.rowIndex != 1) {
        var tab = obj.parentNode.parentNode.parentNode;
        var nowNodeInnerHtml = obj.parentNode.parentNode.innerHTML;
        var nowNowIndex = obj.parentNode.parentNode.rowIndex;
        tab.deleteRow(nowNowIndex);
        var newHtml = "<table cellpadding="5" cellspacing="0">";
        newHtml += ("<TR style='font-weight: bold; text-align: center;'>" + tab.rows[0].innerHTML + "</TR>");
        for (i = 1; i < tab.rows.length; i++) {
          if (i == (nowNowIndex - 1)) {
            newHtml += ("<TR>" + nowNodeInnerHtml + "</TR>");
          }
          newHtml += ("<TR>" + tab.rows[i].innerHTML + "</TR>");
        }
        newHtml += "</table>";
        document.getElementById("divContent").innerHTML = newHtml;
      }
    }
    //使行向下一行
    function setRowDown(obj) {
      if (obj.parentNode.parentNode.rowIndex != (document.getElementById("divContent").childNodes[0].rows.length - 1)) {
        var tab = obj.parentNode.parentNode.parentNode;
        var nowNodeInnerHtml = obj.parentNode.parentNode.innerHTML;
        var nowNowIndex = obj.parentNode.parentNode.rowIndex;
        tab.deleteRow(nowNowIndex);
        var newHtml = "<table cellpadding="5" cellspacing="0">";
        newHtml += ("<TR style='font-weight: bold; text-align: center;'>" + tab.rows[0].innerHTML + "</TR>");
        for (i = 1; i < tab.rows.length; i++) {
          if (i == (nowNowIndex + 1)) {
            newHtml += ("<TR>" + nowNodeInnerHtml + "</TR>");
          }
          newHtml += ("<TR>" + tab.rows[i].innerHTML + "</TR>");
        }
        //向下可能到表格现有行数外 额外处理
        if (tab.rows.length == (nowNowIndex + 1)) {
          newHtml += ("<TR>" + nowNodeInnerHtml + "</TR>");
        }
        newHtml += "</table>";
        document.getElementById("divContent").innerHTML = newHtml;
      }
    }

测试html代码如下

<body>
  <div id="divContent">
    <table cellpadding="5" cellspacing="0">
      <tr style='font-weight: bold; text-align: center;'><td>工号</td><td>姓名</td></tr>
      <tr><td>0001
        <input type="button" value="↑" onclick="setRowUp(this)" />
        <input type="button" value="↓" onclick="setRowDown(this)" />
        </td><td>姓名01</td></tr>
      <tr><td>0002
        <input type="button" value="↑" onclick="setRowUp(this)" />
        <input type="button" value="↓" onclick="setRowDown(this)" />
        </td><td>姓名02</td></tr>
      <tr><td>0003
        <input type="button" value="↑" onclick="setRowUp(this)" />
        <input type="button" value="↓" onclick="setRowDown(this)" />
        </td><td>姓名03</td></tr>
      <tr><td>0004
        <input type="button" value="↑" onclick="setRowUp(this)" />
        <input type="button" value="↓" onclick="setRowDown(this)" />
        </td><td>姓名04</td></tr>
      <tr><td>0005
        <input type="button" value="↑" onclick="setRowUp(this)" />
        <input type="button" value="↓" onclick="setRowDown(this)" />
        </td><td>姓名05</td></tr>
    </table>
  </div>
</body>

总结

以上所述是小编给大家介绍的js操作table中tr的顺序实现上移下移一行的效果，希望对大家有所帮助！