const regex = /^(ATU[0-9]{8}|BE0[0-9]{9}|BG[0-9]{9,10}|CY[0-9]{8}L|CZ[0-9]{8,10}|DE[0-9]{9}|DK[0-9]{8}|EE[0-9]{9}|(EL|GR)[0-9]{9}|ES[0-9A-Z][0-9]{7}[0-9A-Z]|FI[0-9]{8}|FR[0-9A-Z]{2}[0-9]{9}|GB([0-9]{9}([0-9]{3})?|[A-Z]{2}[0-9]{3})|HU[0-9]{8}|IE[0-9]S[0-9]{5}L|IT[0-9]{11}|LT([0-9]{9}|[0-9]{12})|LU[0-9]{8}|LV[0-9]{11}|MT[0-9]{8}|NL[0-9]{9}B[0-9]{2}|PL[0-9]{10}|PT[0-9]{9}|RO[0-9]{2,10}|SE[0-9]{12}|SI[0-9]{8}|SK[0-9]{10})$/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(ATU[0-9]{8}|BE0[0-9]{9}|BG[0-9]{9,10}|CY[0-9]{8}L|CZ[0-9]{8,10}|DE[0-9]{9}|DK[0-9]{8}|EE[0-9]{9}|(EL|GR)[0-9]{9}|ES[0-9A-Z][0-9]{7}[0-9A-Z]|FI[0-9]{8}|FR[0-9A-Z]{2}[0-9]{9}|GB([0-9]{9}([0-9]{3})?|[A-Z]{2}[0-9]{3})|HU[0-9]{8}|IE[0-9]S[0-9]{5}L|IT[0-9]{11}|LT([0-9]{9}|[0-9]{12})|LU[0-9]{8}|LV[0-9]{11}|MT[0-9]{8}|NL[0-9]{9}B[0-9]{2}|PL[0-9]{10}|PT[0-9]{9}|RO[0-9]{2,10}|SE[0-9]{12}|SI[0-9]{8}|SK[0-9]{10})$', 'g')
const str = ``;
// 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