isAlphaNumeric javascript Code Snippet in 2025
stringregexpbeginner
Last Updated: 7 May 2025
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'); // falsejavascript snippet similar to isAlphaNumeric For You in May 2025
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