const regex = new RegExp('(?m)^(?=.*(?:\\r?\\n(?!\\r?\\n).*)*?\\bNew-York\\b)(?=.*(?:\\r?\\n(?!\\r?\\n).*)*?\\bBerlin\\b).*(?:\\r?\\n(?!\\r?\\n).*)*', 'g')
const str = `This is paragraph #1
New-York, London, Paris, Berlin
Some other text
End of paragraph
This is paragraph #2
London, Paris
End of paragraph
This is paragraph #3
New-York, Paris, Berlin
Some other text
End of paragraph
This is paragraph #4
End of paragraph
This is paragraph #5
Paris, Berlin
Some other text
End of paragraph`;
// 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