const regex = /<a(?:\s+name=".*?")?\s+href=.*?#.*?>(.*?)<\/a>/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('<a(?:\\s+name=".*?")?\\s+href=.*?#.*?>(.*?)<\\\/a>', 'g')
const str = `<a href="http://example.com/books/1">The Lord of the Rings</a>
<ul>
<li><a href="http://example.com/books/1#c1" >Chapter 1</a></li>
<li><a name="name before href" href="http://example.com/books/1#c2">Chapter 2</a></li>
<li><a href="http://example.com/books/1#c3" name="name after href">Chapter 3</a></li>
<li><a href="http://example.com/books/1#cN" target="_blank">Chapter N</a></li>
</ul>
<br><br>
<a href="http://example.com/books/1">Harry Potter</a>
<ul>
<li><a href="http://example.com/books/2#c1" target="_self">Chapter 1</a></li>
<li><a href="http://example.com/books/2#c2" name="some have name" title="some others have title" >Chapter 2</a></li>
<li><a href="http://example.com/books/2#c3">Chapter 3</a></li>
<li><a href="http://example.com/books/2#cN" >Chapter N</a></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