regex101: JavaScript Substitution Workspace

Pro

1st Alternative<h1>([^<]*)<\/h1>\s*\n([\w\W]*?)(([^\n\S]*)<td\s.*?<\/td>(\n))(?=\s*<\/tr>)

<h1>the literal text <h1> (case sensitive)

Group 1([^<]*)

Negated Character Class[^<]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

h1>the literal text h1> (case sensitive)

\s*any whitespace character, repeated any number of times

\na line-feed (newline) character (ASCII 10)

Group 2([\w\W]*?)

Character Class[\w\W]*?

*?matches any number of characters from the set below:

\wany word character

\Wany non-word character

Group 3(([^\n\S]*)<td\s.*?<\/td>(\n))

Group 4([^\n\S]*)

Negated Character Class[^\n\S]*

*matches any number of characters outside the set below:

\na line-feed (newline) character (ASCII 10)

\Sany non-whitespace character

<tdthe literal text <td (case sensitive)

\sany whitespace character

.*?any character (except for line terminators), repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

td>the literal text td> (case sensitive)

Group 5(\n)

\na line-feed (newline) character (ASCII 10)

Positive Lookahead(?=\s*<\/tr>)

\s*any whitespace character, repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

tr>the literal text tr> (case sensitive)

2nd Alternative(?<=<h1>([^<]*)<\/h1>[\w\W]*?)(([^\n\S]*)<td\s.*?<\/td>(\n))(?=\s*<\/tr>)

Positive Lookbehind(?<=<h1>([^<]*)<\/h1>[\w\W]*?)

<h1>the literal text <h1> (case sensitive)

Group 6([^<]*)

Negated Character Class[^<]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

h1>the literal text h1> (case sensitive)

Character Class[\w\W]*?

*?matches any number of characters from the set below:

\wany word character

\Wany non-word character

Group 7(([^\n\S]*)<td\s.*?<\/td>(\n))

Group 8([^\n\S]*)

Negated Character Class[^\n\S]*

*matches any number of characters outside the set below:

\na line-feed (newline) character (ASCII 10)

\Sany non-whitespace character

<tdthe literal text <td (case sensitive)

\sany whitespace character

.*?any character (except for line terminators), repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

td>the literal text td> (case sensitive)

Group 9(\n)

\na line-feed (newline) character (ASCII 10)

Positive Lookahead(?=\s*<\/tr>)

\s*any whitespace character, repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

tr>the literal text tr> (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

26 tokens

Regular Expression

<h1>([^<]*)<\/h1>\s*\n([\w\W]*?)(([^\n\S]*)<td\s.*?<\/td>(\n))(?=\s*<\/tr>)|(?<=<h1>([^<]*)<\/h1>[\w\W]*?)(([^\n\S]*)<td\s.*?<\/td>(\n))(?=\s*<\/tr>)

New

<h1>TITLE OF HEAD 1</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 1, AFTER HEAD 1</td>
        </tr>
        <tr>
            <td class="one">ITEM 2, AFTER HEAD 1</td>
        </tr>
    </tbody>
</table>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 3, AFTER HEAD 1</td>
        </tr>
        <tr>
            <td class="one">ITEM 4, AFTER HEAD 1</td>
        </tr>
        <tr>
            <td class="one">ITEM 5, AFTER HEAD 1</td>
        </tr>
    </tbody>
</table>
<h1>TITLE OF HEAD 2</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 6, AFTER HEAD 2</td>
        </tr>
    </tbody>
</table>
<h1>TITLE OF HEAD 3</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 7, AFTER HEAD 3</td>
        </tr>
        <tr>
            <td class="one">ITEM 8, AFTER HEAD 3</td>
        </tr>
        <tr>
            <td class="one">ITEM 9, AFTER HEAD 3</td>
        </tr>
        <tr>
            <td class="one">ITEM 10, AFTER HEAD 3</td>
        </tr>
    </tbody>
</table>
<h1>TITLE OF HEAD 4</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 11, AFTER HEAD 4</td>
        </tr>
        <tr>
            <td class="one">ITEM 12, AFTER HEAD 4</td>
        </tr>
    </tbody>
</table>

Extraction

<h1>TITLE OF HEAD 1</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 1, AFTER HEAD 1</td>
        </tr>
        <tr>
            <td class="one">ITEM 2, AFTER HEAD 1</td>
        </tr>
    </tbody>
</table>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 3, AFTER HEAD 1</td>
        </tr>
        <tr>
            <td class="one">ITEM 4, AFTER HEAD 1</td>
        </tr>
        <tr>
            <td class="one">ITEM 5, AFTER HEAD 1</td>
        </tr>
    </tbody>
</table>
<h1>TITLE OF HEAD 2</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 6, AFTER HEAD 2</td>
        </tr>
    </tbody>
</table>
<h1>TITLE OF HEAD 3</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 7, AFTER HEAD 3</td>
        </tr>
        <tr>
            <td class="one">ITEM 8, AFTER HEAD 3</td>
        </tr>
        <tr>
            <td class="one">ITEM 9, AFTER HEAD 3</td>
        </tr>
        <tr>
            <td class="one">ITEM 10, AFTER HEAD 3</td>
        </tr>
    </tbody>
</table>
<h1>TITLE OF HEAD 4</h1>
<table>
    <tbody>
        <tr>
            <td class="one">ITEM 11, AFTER HEAD 4</td>
        </tr>
        <tr>
            <td class="one">ITEM 12, AFTER HEAD 4</td>
        </tr>
    </tbody>
</table>