String is alphanumeric
JavaScript, String, Regexp · Oct 20, 2020

Checks if a string contains only alphanumeric characters.
- Use
RegExp.prototype.test()
to check if the input string matches against the alphanumeric regexp pattern.
const isAlphaNumeric = str => /^[a-z0-9]+$/gi.test(str); isAlphaNumeric('hello123'); // true isAlphaNumeric('123'); // true isAlphaNumeric('hello 123'); // false (space character is not alphanumeric) isAlphaNumeric('#$hello'); // false