const regex = /(?<=^.. |^... |^.... )([^,]*,[^,:]*)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<=^.. |^... |^.... )([^,]*,[^,:]*)', 'gm')
const str = `46. Delmay, B.: I personaggi della Divina Commedia. Volume 201. Olschki (1986)
129. Kurucz, R.: Atlas9 stellar atmosphere programs and 2 km/s grid. ATLAS9 Stellar Atmosphere Programs and 2 km/s grid. Kurucz CD-ROM No. 13. Cambridge, Mass.: Smithsonian Astrophysical Observatory, 1993. 13 (1993)
130. Andrewes, D.G., Holton, J.R., Leovy, C.B.: Middle atmosphere dynamics. Number 40. Academic press (1987)
6. Welch, T.A.: A technique for high-performance data compression. Computer 17(6) (1984) 8–19
47. Alighieri, D., Landino, C., da Figino, P., Capcasa, M.: La divina commedia. G. Silvestri (1829)`;
// 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