API reference › @evolu/common › Type › UrlSafeString

const UrlSafeString: regex(
  "UrlSafeString",
  /^[A-Za-z0-9_-]+$/,
)(String);

Defined in: packages/common/src/Type.ts:1554

URL-safe string.

A UrlSafeString uses a limited alphabet that is safe for URLs:

• Uppercase letters (A-Z)
• Lowercase letters (a-z)
• Digits (0-9)
• Dash (-)
• Underscore (_)

This is the same character set used by Base64Url encoding, but this type does not validate that the string is actually Base64Url-encoded data.

Example

const result = UrlSafeString.from("abc123_-");
if (result.ok) {
  console.log("Valid URL-safe string:", result.value);
} else {
  console.error("Invalid URL-safe string:", result.error);
}