const regex = new RegExp('^[a-zA-Z][a-zA-Z0-9_.]{5,20}[a-zA-Z0-9][@][a-z][a-z0-9]{2,9}[.][a-z]{1,3}', 'gm')
const str = `bhargavi.bommidi@gmail.com
lovely.bhar@rasna
rasna_bha@phb.in
^[a-zA-Z][a-zA-Z0-9_.]{5,20}[a-zA-Z0-9][@]^[a-z][a-z0-9]{2,9}[.]^[a-z]{1,3}
`;
// 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