我的tbody如下所示：
<tbody class="yui-dt-data">
<tr data-record-id="QB.D.FT1505UD.01.IP" class="rec-QB.D.FT1505UD.01.IP">
<td class="yui-dt-col-market" data-column-id="market">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 300px;"><a class="tableIcon dealClosed" igtitle="Status: Market Closed#Action: No Action Available">FTSE to be above 6300.36 at 3:10pm</a></div>
</td>
<td class="yui-dt-col-lightbulb" data-column-id="lightbulb">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 18px;"><a class="signal-status" href="#"> </a></div>
</td>
<td class="yui-dt-col-superNews" data-column-id="superNews">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 18px;"><a class="superNewsIcon off" igtitle="Reuters Info" href="#"> </a></div>
</td>
<td class="yui-dt-col-news" data-column-id="news">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 18px;"><a class="newsIcon off" href="#"> </a></div>
</td>
<td class="yui-dt-col-chart" data-column-id="chart">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 18px;"><a class="basicChartIcon on" href="#" igtitle="Chart"> </a></div>
</td>
<td class="yui-dt-col-menu" data-column-id="menu">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 18px;"><a class="optionsBtn" href="#" igtitle="Click for more options"> </a></div>
</td>
<td class="yui-dt-col-displayPeriod" data-column-id="displayPeriod">
<div class="ig-table-cell-inner yui-dt-liner" igtitle="" style="width: 80px;">06-JUN-16</div>
</td>
<td class="yui-dt-col-sell" data-column-id="sell">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 60px;">
<div igtitle="Status: Market Open#Action: Place new Deal" class="dealOpen price">0.0</div>
</div>
</td>
<td class="yui-dt-col-buy" data-column-id="buy">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 60px;">
<div igtitle="Status: Market Open#Action: Place new Deal" class="dealOpen price">2.0</div>
</div>
</td>
<td class="yui-dt-col-netChange" data-column-id="netChange">
<div class="ig-table-cell-inner yui-dt-liner red" style="width: 69px;">-0.6</div>
</td>
<td class="yui-dt-col-percentageChange" data-column-id="percentageChange">
<div class="ig-table-cell-inner yui-dt-liner blue" style="width: 68px;">6294.7</div>
</td>
<td class="yui-dt-col-updateTime" data-column-id="updateTime">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 75px;"><span>15:08:51</span></div>
</td>
<td class="yui-dt-col-high" data-column-id="high">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 60px;"><span>100.0</span></div>
</td>
<td class="yui-dt-col-low" data-column-id="low">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 60px;"><span>0.0</span></div>
</td>
<td class="yui-dt-col-_extra" data-column-id="_extra">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 4000px;"> </div>
</td>
</tr>
<tr data-record-id="QB.D.FT1505UD.02.IP" class="rec-QB.D.FT1505UD.02.IP">
<td class="yui-dt-col-market" data-column-id="market">
<div class="ig-table-cell-inner yui-dt-liner"><a class="tableIcon dealClosed" igtitle="Status: Market Closed#Action: No Action Available">FTSE to be above 6295.36 at 3:10pm</a></div>
</td>
<td class="yui-dt-col-lightbulb" data-column-id="lightbulb">
<div class="ig-table-cell-inner yui-dt-liner"><a class="signal-status" href="#"> </a></div>
</td>
<td class="yui-dt-col-superNews" data-column-id="superNews">
<div class="ig-table-cell-inner yui-dt-liner"><a class="superNewsIcon off" igtitle="Reuters Info" href="#"> </a></div>
</td>
<td class="yui-dt-col-news" data-column-id="news">
<div class="ig-table-cell-inner yui-dt-liner"><a class="newsIcon off" href="#"> </a></div>
</td>
<td class="yui-dt-col-chart" data-column-id="chart">
<div class="ig-table-cell-inner yui-dt-liner"><a class="basicChartIcon on" href="#" igtitle="Chart"> </a></div>
</td>
<td class="yui-dt-col-menu" data-column-id="menu">
<div class="ig-table-cell-inner yui-dt-liner"><a class="optionsBtn" href="#" igtitle="Click for more options"> </a></div>
</td>
<td class="yui-dt-col-displayPeriod" data-column-id="displayPeriod">
<div class="ig-table-cell-inner yui-dt-liner" igtitle="">06-JUN-16</div>
</td>
<td class="yui-dt-col-sell" data-column-id="sell">
<div class="ig-table-cell-inner yui-dt-liner">
<div igtitle="Status: Market Closed#Action: No Action Available" class="dealClosed price priceFlashDown">15.6</div>
</div>
</td>
<td class="yui-dt-col-buy" data-column-id="buy">
<div class="ig-table-cell-inner yui-dt-liner">
<div igtitle="Status: Market Closed#Action: No Action Available" class="dealClosed price priceFlashDown">23.4</div>
</div>
</td>
<td class="yui-dt-col-netChange" data-column-id="netChange">
<div class="ig-table-cell-inner yui-dt-liner red">-0.6</div>
</td>
<td class="yui-dt-col-percentageChange" data-column-id="percentageChange">
<div class="ig-table-cell-inner yui-dt-liner blue">6294.7</div>
</td>
<td class="yui-dt-col-updateTime" data-column-id="updateTime">
<div class="ig-table-cell-inner yui-dt-liner"><span>15:09:42</span></div>
</td>
<td class="yui-dt-col-high" data-column-id="high">
<div class="ig-table-cell-inner yui-dt-liner"><span>100.0</span></div>
</td>
<td class="yui-dt-col-low" data-column-id="low">
<div class="ig-table-cell-inner yui-dt-liner"><span>0.0</span></div>
</td>
<td class="yui-dt-col-_extra" data-column-id="_extra">
<div class="ig-table-cell-inner yui-dt-liner" style="width: 4000px;"> </div>
</td>
</tr>
</tbody>
我想得到两个职位：
market 的 <td class="yui-dt-col-market" data-column-id="market">名称
来自sell
<td class="yui-dt-col-sell" data-column-id="sell">值
但我不知道如何从tbody获得它。
有两个tr个obejcts，我认为它应该被加载到数组。
请不要使用jQuery解决方案。
有什么想法吗？
答案 0 :(得分：4)
你可以用这个： 1）从tbody获取所有行 2）从每一行获取所有'td'
var rows =document.getElementsByTagName("tbody")[0].rows;
for(var i=0;i<rows.length;i++){
var td = rows[i].getElementsByTagName("td")[i];
console.log(td)
}
比你想用这个td对象做什么。
答案 1 :(得分：3)
是的，你使用querySelector在正确的行上，你只需要使用[data-column-id="market"]来指定一个元素具有一定值的属性，从而获得正确的语法：
var data = [];
// loop through all rows
var rows = document.querySelectorAll('table tbody tr');
rows.forEach(function(row) {
var obj = {};
// get the td element with attribute data-column-id="market"
var marketElement = row.querySelector('td[data-column-id="market"]');
if(marketElement !== null) {
// exists - set the object property
// if you need to parse this to extract "FTSE", that is a separate task
obj.market = marketElement.innerText.trim();
}
// get the td element with attribute data-column-id="sell"
var sellElement = row.querySelector('td[data-column-id="sell"]');
if(sellElement !== null) {
// exists - set the object property
obj.sell = sellElement.innerText.trim();
}
// add object to the result array
data.push(obj);
});
你可以做一点＆＃34;更简单＆＃34;通过假设值肯定会存在于一行中，但如果您不小心，这可能会导致未定义的值错误：
var data = [];
document.querySelectorAll('table tbody tr').forEach(function(row) {
data.push({
market: row.querySelector('td[data-column-id="market"]').innerText.trim(),
sell: row.querySelector('td[data-column-id="sell"]').innerText.trim(),
});
});
答案 2 :(得分：0)
如果你可以使用jQuery（老实说我没有看到任何真正的理由不使用，除非这是一个学校作业），这个JSFiddle中展示了一个简单的解决方案：
console.log("Market values:");
var market=[];
$('td.yui-dt-col-market').each(function(i, obj) {
market.push($(this).text().trim());
console.log(market[i]);
});
console.log("Sell values:");
var sell=[];
$('td.yui-dt-col-sell').each(function(i, obj) {
sell.push($(this).text().trim());
console.log(sell[i]);
});
它的作用是获取指定类的列，并且对于每个列，它获取文本值并将其保存在循环上方创建的值数组中。请记住，如果要使用jQuery，则需要在标题中包含include语句，如下所示：
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>