const regex = /^(?<a>[^\s-]+(?:-[^\s-]+)*)-(?<b>[^\s.-]+)\.(?<c>\w+)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?<a>[^\\s-]+(?:-[^\\s-]+)*)-(?<b>[^\\s.-]+)\\.(?<c>\\w+)$', 'gm')
const str = `id-string1-string2-string3.extension
Il2dK-Ud2d9-Kod2d-d9dwo.jpg
j54fwf3da-7jrg-9eujodww-kio98ujk.png`;
// 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