const regex = /(?=(?:^(?:\+?1\s*(?:[.-]\s*)?)?(?!(?:(?:.*\(.*)|(?:.*\).*)))(?:[2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9]))|(?:.*\((?:[2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9])\).*))(?:\+?1\s*(?:[.-]\s*)?)?(?:\(?([2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9])\)?)\s*(?:[.-]\s*)?([2-9]1[02-9]|[2-9][02-9]1|[2-9][02-9]{2})\s*(?:[.-]\s*)?([0-9]{4})(?:\s*(?:#|x\.?|ext\.?|extension)\s*(\d{1,15}))?$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?=(?:^(?:\\+?1\\s*(?:[.-]\\s*)?)?(?!(?:(?:.*\\(.*)|(?:.*\\).*)))(?:[2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9]))|(?:.*\\((?:[2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9])\\).*))(?:\\+?1\\s*(?:[.-]\\s*)?)?(?:\\(?([2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9])\\)?)\\s*(?:[.-]\\s*)?([2-9]1[02-9]|[2-9][02-9]1|[2-9][02-9]{2})\\s*(?:[.-]\\s*)?([0-9]{4})(?:\\s*(?:#|x\\.?|ext\\.?|extension)\\s*(\\d{1,15}))?$', 'gm')
const str = `// valid
(555)555-5555
1 (555) 555-5555
1 (555)-555-5555
555-555-5555
+1-555-532-3455
1-555-532-3455
1-555-532-3455 ext 4
1 (555) 555-5555 extension 123456789123456
// invalid
555-5555
1234567890
555--555-5555
555-555--5555
1234567
((555))555-5555
invalidphone
+91 (123) 456-7890
123.456.7890
1 (555) 555-5555 extension 0123456789012345`;
// 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