var re = /(?:\d{3}|\(\d{3}\))([-\/\.])\d{3}\1\d{4}/;
function testInfo(phoneInput) {
var OK = re.exec(phoneInput);
}
let phoneNumbers = [
"123-456-7890",
"(123) 456-7890",
"123.456.7890",
"123/456/7890",
"123.456-7890",
"1234567890",
"123-45-6789",
"12-3456-7890"
];
for (let number of phoneNumbers) {
let result = testInfo(number);
console.log(`Testing "${number}": ${result ? "Matched" : "Not Matched"}`);
}
console.log("Regex test completed.");