const regex = /# Adding password requirements are as easy as tacking on
# another (?=...) group.
^
(?=(?:[^a-z]*[a-z]){1}) # At least {1} lowercase 'a-z' letter
(?=(?:[^A-Z]*[A-Z]){2}) # At least {2} uppercase 'A-Z' letters
(?=(?:[^0-9]*[0-9]){3}) # At least {3} digits
(?=(?:[^\s]*[\s]){1}) # At least {1} whitespace
(?=(?:[^[:punct:]]*[[:punct:]]){1}) # At least {1} special char
(?=.{9}) # A minimum of 9 characters
/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('# Adding password requirements are as easy as tacking on
# another (?=...) group.
^
(?=(?:[^a-z]*[a-z]){1}) # At least {1} lowercase \'a-z\' letter
(?=(?:[^A-Z]*[A-Z]){2}) # At least {2} uppercase \'A-Z\' letters
(?=(?:[^0-9]*[0-9]){3}) # At least {3} digits
(?=(?:[^\\s]*[\\s]){1}) # At least {1} whitespace
(?=(?:[^[:punct:]]*[[:punct:]]){1}) # At least {1} special char
(?=.{9}) # A minimum of 9 characters
', 'gm')
const str = `See 'unit tests' to see all matching/non-matching examples.
`;
// 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