const regex = /^[_A-Za-z0-9-]+(?:\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(?:\.[A-Za-z0-9-]+)*(?:\.[A-Za-z]{2,})$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^[_A-Za-z0-9-]+(?:\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(?:\\.[A-Za-z0-9-]+)*(?:\\.[A-Za-z]{2,})$', 'gm')
const str = `john@publix.com
john.doe@publix.com
john32.32@publix.church
john.doe@publix.church
john32@somesite.c
`;
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