30-seconds-of-code/snippets/isAlphaNumeric.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
String is alphanumeric	string,regexp	beginner	2020-09-06T07:59:16+03:00	2020-10-20T23:02:01+03:00

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