const regex = /<li>(?>[^<]+|(<[uo]l)>|<(?!\/?li)[^>]*>|(?R))*<\/li>(?(1)|(*F))/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('<li>(?>[^<]+|(<[uo]l)>|<(?!\\\/?li)[^>]*>|(?R))*<\\\/li>(?(1)|(*F))', 'gm')
const str = `<li>Hi</li> - Just some text, should ignore
<li><ul><li>hi</li></ul></li> - Directly in <li>
<li>Hi<ul><li>hi</li></ul></li> - Plain text before the nested list
<li><strong>Hi</strong><ul><li>hi</li></ul></li> - HTML content before the nested list
<ul><li>list item 1</li></ul>
<ul><li>list item 1</li><li><ol><li>2.1</li><li>2.2</li><li>2.3</li></ol></li><li>list item 3</li></ul>
<ul><li>list item 1</li><li>asdasdas<ol><li>2.1</li><li>2.2</li><li>2.3</li></ol></li><li>list item 3</li></ul>
<ul><li>list item 1</li><li><strong>asdasdas</strong><ol><li>2.1</li><li>2.2</li><li>2.3</li></ol></li><li>list item 3</li></ul>
`;
// 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