const regex = new RegExp('<([^>]+?)([^>]*?)>(.*?)<\\/\\1>', 'gs')
const str = `^(?=.*?\\bdog\\b)((?!cat).)*\$
<([^>]+?)([^>]*?)>(.*?)<\\/\\1>
This is the second paragraph. It contains an ordered list:
<ol>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
</ol>
This is a text after the list in the second paragraph.
This is another part of a paragraph
<ol>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
</ol>
This is a text after the another list in the second paragraph.
This is a text after the list in the second paragraph.
This is another part of a paragraph
<ol>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
</ol>
test to odfjdf iofsdfsoh
`;
const subst = `\1 `;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
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