javascript - Can JS modify table elements using DOM operations?

Question

What I want to achieve is to delete the second half of the table below directly using JS.
But I don’t know how to call it.
That is, starting from the position of <h2>2017</h2> and ending with the last part.
How to delete DOM elements using JS?

    <table cellpadding="0" cellspacing="0" style="word-wrap: break-word;">
        <colgroup class="__web-inspector-hide-shortcut__">
            <col width="10px">
            <col width="49px">
            <col width="10px">
            <col width="88px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
            <col width="49px">
        </colgroup>
        <tbody style="text-align:center;">
            <tr>
                
            </tr>
            <tr>
                <td colspan="19" align="center" style="border:none;">
                    <h2><span ng-bind="compare_year" class="ng-binding">2016</span>年度</h2>
                </td>
            </tr>
            <tr class="">
                <td class="top">
                    序号
                </td>
                <td class="top">
                    A1<br>姓名
                </td>
                <td class="top">
                    A2<br>性别
                </td>
                <td class="top" colspan="3">
                    A3<br>证件号码
                </td>
                <td class="top">
                    A4<br>与户主关系
                </td>
                <td class="top">
                    A5<br>民族
                </td>
                <td class="top">
                    A6<br>政治面貌
                </td>                
                <td class="top">
                    A7<br>文化程度
                </td>            
                <td class="top">
                    A8<br>在校生情况
                </td>
                <td class="top">
                    A9<br>健康状况
                </td>
                <td class="top">
                    A10<br>劳动技能
                </td>
                <td class="top">
                    A11<br>务工情况
                </td>
                <td class="top">
                    A12<br>务工时间(单位:月)
                </td>
                <td class="top">
                    A13<br>是否现役军人
                </td>
                <td class="top right">
                    A14<br>是否参加大病医疗保险
                </td>
            </tr>
            <!-- <tr ng-repeat="row in AB01.rowSet.primary"> -->
            
            <!-- ngRepeat: cell in row.AB01 --><tr ng-repeat="cell in row.AB01" class="ng-scope">
            
                <td ng-bind="$index+1" class="ng-binding">1</td>
                <td ng-bind="cell.data.AAB002" class="ng-binding">王秀梅</td>
                <td ng-bind="cell.data.AAB003" class="ng-binding">女</td>
                <td colspan="3" ng-bind="cell.data.AAB004" class="ng-binding">37250*81766</td>
                <td ng-bind="cell.data.AAB006" class="ng-binding">户主</td>
                <td ng-bind="cell.data.AAB007" class="ng-binding">汉族</td>
                <td ng-bind="cell.data.AAK033" class="ng-binding">群众</td>
                <td ng-bind="cell.data.AAB008" class="ng-binding">文盲或半文盲</td>                
                <td ng-bind="cell.data.AAB009" class="ng-binding">非在校生</td>
                <td ng-bind="cell.data.AAB017" class="ng-binding">长期慢性病</td>
                <td ng-bind="cell.data.AAB010" class="ng-binding">无劳动力</td>
                <td ng-bind="cell.data.AAB011" class="ng-binding">其他</td>
                <td ng-bind="cell.data.AAB012" class="ng-binding">0</td>
                <td ng-bind="cell.data.AAB019" class="ng-binding">否</td>
                <td class="right ng-binding" ng-bind="cell.data.AAB022"></td>
            </tr><!-- end ngRepeat: cell in row.AB01 -->
            <tr>
                <td colspan="19" align="center" style="border:none;">
                    <h2>2017年度</h2>
                </td>
            </tr>
            <tr>
                <td class="top">
                    序号
                </td>
                <td class="top">
                    A1<br>姓名
                </td>
                <td class="top">
                    A2<br>性别
                </td>
                <td class="top" colspan="3">
                    A3<br>证件号码
                </td>
                <td class="top">
                    A4<br>与户主关系
                </td>
                <td class="top">
                    A5<br>民族
                </td>
                
                <td class="top">
                    A6<br>政治面貌
                </td>
                
                <td class="top">
                    A7<br>文化程度
                </td>
                
                <td class="top">
                    A8<br>在校生情况
                </td>
                <td class="top">
                    A9<br>健康状况
                </td>
                <td class="top">
                    A10<br>劳动技能
                </td>
                <td class="top">
                    A11<br>务工地点
                </td>
                <td class="top">
                    A12<br>务工时间(单位:月)            
                </td>
                <td class="top">
                    A13<br>是否现役军人
                </td>
                <td class="top">
                    A14<br>是否参加大病医疗保险            
                </td>
                <td class="top">
                    A15<br>是否享受低保
                </td>
                <td class="top">
                    A50<br>务工企业名称
                </td>
                <td class="top right">
                    联系电话
                </td>                        
            </tr>
            <tr>
                <td>1</td>
                <td></td>
                <td></td>
                <td colspan="3"></td>
                <td>户主</td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                
                <td class="right"></td>
            </tr>
            <tr>
                <td>2</td>
                <td></td>
                <td></td>
                <td colspan="3"></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                
                <td class="right"></td>
            </tr>
            <tr>
                <td>3</td>
                <td></td>
                <td></td>
                <td colspan="3"></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td class="right"></td>
            </tr>
            <tr>
                <td>4</td>
                <td></td>
                <td></td>
                <td colspan="3"></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td class="right"></td>
            </tr>
            <tr>
                <td>5</td>
                <td></td>
                <td></td>
                <td colspan="3"></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td class="right"></td>
            </tr>
            <tr>
                <td>6</td>
                <td></td>
                <td></td>
                <td colspan="3"></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td class="right"></td>
            </tr>
        </tbody>

Answer 1

Why not extract it separately and write "2017" into a table independently?
If you must do this, you can:

1. Add a name attribute (such as name="special-tr-group") to all the first-level tr you want to hide
   as follows:

<tr name="special-tr-group">
    <td colspan="19" align="center" style="border:none;">
        <h2>2017年度</h2>
    </td>
</tr>
<tr name="special-tr-group">
    <td class="top">
        序号
    </td>
    <td class="top">
        A1<br>姓名
    </td>
    <td class="top">
        A2<br>性别
    </td>
    ...
    ...
</tr>
...
...

1. Then add an id to your tbody:

<tbody style="text-align:center;" id="tbody-year">

1. Finally, after your DOM is loaded, JS implementation:

var tBody = document.getElementById("tbody-year");    //表格中的tbody节点
console.log(tBody);
var trGroup = document.getElementsByName("special-tr-group");    //要删除的节点
for (var i=0; i < trGroup.length; i++) {
    tBody.removeChild(trGroup[i]);
}