const regex = new RegExp('(?<=SJ顺丰\\s)\\d+', 'gm')
const str = `<div>
<table style="border: 1px solid #ECECEC; height: 125px; padding-left: 5px; padding-right: 5px; background-color: #EEF7FF; width: 100%">
<tr>
<td style="font-size: 20px; font-weight: bold; width: 252px; padding-top: 20px;">关注信公众号</td>
<td></td>
<td rowspan="2">
<img style="margin-top: 8px;" src="../Resources/Images/Box/qrcode_for_gh.png" /></td>
</tr>
<tr>
<td style="font-size: 14px; vertical-align: top;">您可以随时接收物流动态、为包裹付款、获取最新的活动信息。</td>
<td style="font-size: 14px; width: 260px; vertical-align: top;"><span style="font-size: 14px; float: right;">以最方便的方式玩转海淘＞</span><br />
<span style="font-size: 14px; float: right;">扫一扫，关注</span></td>
</tr>
</table>
</div>
<br />
<div class="main">
<input type="hidden" id="boxcount" value="1" />
<input id="tab1" type="radio" name="tabs" style="display: none;" checked="checked"
/>
<label for="tab1"><a style="cursor: pointer;">XJ202002232539531</a></label>
<section id="content1">
<p class="tc mt20"></p>
<div class="result-top"><span class="col1">时间</span><span class="col2">地点和跟踪进度</span></div>
<table class="result-info2" cellspacing="0">
<tbody>
<tr class="last">
<td class="row1">2020/3/8 10:12:11</td>
<td class="status status-first"> </td>
<td>已发货:(SJ顺丰 051131145456) <a target = "_blank" href="http://www.kuaidi100.com/chaxun?com=shunfeng&nu=051131145456" style="text-decoration:none;" onclick="AddQuery()">国内物流查询>></a></td>
</tr>
<tr>
<td class="row1">2020/3/8 10:11:11</td>
<td class="status"> </td>
<td>已清关 </td>
</tr>
<tr>
<td class="row1">2020/3/5 13:58:00</td>
<td class="status"> </td>
<td>已到达清关口岸 </td>
</tr>
\``;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions