const regex = new RegExp('.*begin|end.*|[^e]*?\\b([A-Z]{2,})\\b', 'gms')
const str = `Lorem ipsum dolor sit amet, consectetur adipiscing elit.
NOT MATCHED in HERE Vestibulum vehicula arcu cursus justo luctus gravida. Praesent elefur dictum sollicitudin.
begin
Nullam mi justo, pulvinar sit amet leo sed, commodo malesuada nulla.
but MATCHED HERE Donec lobortis arcu eget turpis commodo, sed interdum leo OK elefur.
end
NOT MATCHED HERE
Cras venenatis felis vel nisi elementum varius.
Proin TEST sed magna sed erat consequat pretium eu sit amet nibh.`;
// 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