regex101: JavaScript Match Workspace

Regular Expression

[\n.]*(<tr class="hl" >[.\n]*<\/tr>)[.\n]*

New

<table id="hhh"
	   class="row_table_data">
	<thead>
		<tr>
			<td></td>
			<td>J</td>
			<td>N</td>
			<td>E</td>
		</tr>
	</thead>
	<tbody>

		<tr class="hover">

			<td class="ras " >2</td>
			<td class="plsa " ><a href="">X</a> </td>
			<td class="lefv " >3</td>
			<td class="xpm lc" >1</td>
		</tr>

		<tr class="hl" >

			<td class="ras  fc" >3</td>
			<td class="plsa " ><a href="">M</a> </td>
			<td class="lefv " >3</td>
			<td class="xpm  lc" >3</td>
		</tr>

		<tr class="hover">

			<td class="ras " >4</td>
			<td class="plsa " ><a href="">l</a> </td>
			<td class="lefv " >3</td>
			<td class="xpm " >3</td>
		</tr>

Extraction

<table id="hhh"
	   class="row_table_data">
	<thead>
		<tr>
			<td></td>
			<td>J</td>
			<td>N</td>
			<td>E</td>
		</tr>
	</thead>
	<tbody>

		<tr class="hover">

			<td class="ras " >2</td>
			<td class="plsa " ><a href="">X</a> </td>
			<td class="lefv " >3</td>
			<td class="xpm lc" >1</td>
		</tr>

		<tr class="hl" >

			<td class="ras  fc" >3</td>
			<td class="plsa " ><a href="">M</a> </td>
			<td class="lefv " >3</td>
			<td class="xpm  lc" >3</td>
		</tr>

		<tr class="hover">

			<td class="ras " >4</td>
			<td class="plsa " ><a href="">l</a> </td>
			<td class="lefv " >3</td>
			<td class="xpm " >3</td>
		</tr>