const regex = /(?:<iepigraph(?U).*>(?-U)(?:\s)*)+(?U)(.*)(?-U)(?:<\/iepigraph>)+/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:<iepigraph(?U).*>(?-U)(?:\\s)*)+(?U)(.*)(?-U)(?:<\\\/iepigraph>)+', 'gm')
const str = `<p class="p">Del podio del último Balón de Oro sólo sigue él en el Mundial y demostrando que es un crack absoluto.</p>
<p>
<b>
<span class="p">
<iepigraph class="epitit">
<iepigraph class="epitit">2. REGATE</iepigraph>
</iepigraph>
</span>
</b>
<span class="p"/>`;
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