JS RegExp Patterns
Build a pattern from a clear input rule. This small pattern accepts a simple workshop code, not every possible identifier.
Where to run this
This example uses the JavaScript console playground. Select Run to execute it; the example does not run on this lesson page.
A practical example
const pattern = /^[A-Z]{2}-\d{3}$/;
console.log(pattern.test("RC-204"));
What happens
RC-204 follows the chosen rule.