alphanumeric property

RegExp alphanumeric
final

Matches alphanumeric strings (letters and digits only).

  • Examples (✅ Valid): abc123, Hello2025
  • Examples (❌ Invalid): abc!, 123_

Use Case: Usernames, tags, IDs that exclude symbols.

Implementation

static final RegExp alphanumeric = RegExp(r'^[a-zA-Z0-9]+$');