Variable IS_ALPHA_REGEX`Const`

IS_ALPHA_REGEX: RegExp = ...

Matches if a string contains only alphabetic characters (A–Z, a–z).

Remarks

This regex is ASCII-only and does NOT support Unicode letters. For Unicode support, consider using: IS_ALPHA_UNICODE_REGEX

Pattern:

^ → start of string
[a-zA-Z] → ASCII letters only
+ → one or more characters
$ → end of string

Example

IS_ALPHA_REGEX.test("Hello"); // true
IS_ALPHA_REGEX.test("123");   // false
IS_ALPHA_REGEX.test("Hello123");   // false
IS_ALPHA_REGEX.test("Hello!");   // false