const regex = new RegExp('^_?[a-z0-9]+(?:[._+-][a-z0-9]+)*@(?!\\d+(?:\\.\\d+)*$)(?:\\w+(?:-\\w+)*\\.)+\\w{2,}$', 'gm')
const str = `###################### Valid Emails ########################################################
######################## German, Austrian, international ###################################
janedoe@web.de
jane.doe@web.de
jdoe@web.de
jane-doe@web.de
jane@web.de
doe@web.de
janed@web.de
doej@web.de
jane_doe@web.de
j.doe@web.de
jane.d@web.de
janedoe@t-online.de
jane.doe@t-online.de
jdoe@t-online.de
jane-doe@t-online.de
jane@t-online.de
janed@t-online.de
doej@t-online.de
jane_doe@t-online.de
j.doe@t-online.de
jane.d@t-online.de
janedoe@hotmail.de
jane.doe@hotmail.de
jdoe@hotmail.de
jane-doe@hotmail.de
janedoe@gmx.de
jane.doe@gmx.de
jdoe@gmx.de
jane-doe@gmx.de
jane.doe@post.at
jane-doe@post.at
janedoe@post.at
jane@post.at
john.doe@austrian.com
horneaudrey@fulbright.at
email@example.web
#####################################################################################
########################## Not valid email ##########################################
.test@gmail.com
-test@gmail.com
t.-.est@gmail.com
.test.@gmail.com
test.@gmail.com
test.@.gmail.com
test@.gmail.com
test@.gmail.com.
test@gmail.com.
"email"@example.com
#@%^%#\$@#\$@#.com
@example.com
Joe Smith <email@example.com>
email.example.com
email@example@example.com
.email@example.com
email.@example.com
email..email@example.com
あいうえお@example.com
email@example.com (Joe Smith)
email@example
email@-example.com
email@111.222.333.44444
email@example..com
Abc..123@example.com`;
// 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