const regex = new RegExp('started(.*?(?:stored\\s+(\\d+)\\s+)?)finished', 'gs')
const str = `started xx xxxxxxx xxxxx xxxxxx xx xxxxxxxxx xxxxxxx xxxx xx
xx xxx xxxxx xxxx xxxxxxxx xxxx xxxxxx found 9999 xxxxx xxxxx
xxx xx xxxx xxxx xxxxxxxxxxx xxxxxxx xxx stored 9999 finished`;
// 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