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fix: add support for Mercosul motorcycle license plates #458

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Merged
hyanmandian merged 4 commits into from
Mar 30, 2026
Merged

fix: add support for Mercosul motorcycle license plates #458

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ece2a85
🐛 update Mercosul regex to support additional format
Henrique-volponi Mar 17, 2026
19c9f8a
✅ Adicione suporte para formatos de placas de moto Mercosul nos testes
Henrique-volponi Mar 17, 2026
715c0d8
✅ Atualiza documentação para incluir suporte a placas de moto no form…
Henrique-volponi Mar 27, 2026
c0bd68c
♻️ ajusta formatação da expressão regular do Mercosul
Henrique-volponi Mar 27, 2026
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3 changes: 3 additions & 0 deletions src/is-valid-license-plate/is-valid-license-plate.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,9 @@ describe("isValidLicensePlate", () => {
it("when mercosul license plate format is valid", () => {
expect(isValidLicensePlate("abc1d23")).toBe(true);
expect(isValidLicensePlate("ABC1D23")).toBe(true);

expect(isValidLicensePlate("ABC12D3")).toBe(true);
expect(isValidLicensePlate("abc12d3")).toBe(true);
});
});
});
11 changes: 6 additions & 5 deletions src/is-valid-license-plate/is-valid-license-plate.ts
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
const mercosulRegex = /^[a-z]{3}[0-9]{1}[a-z]{1}[0-9]{2}$/i;
const mercosulRegex =
/^[a-z]{3}[0-9]{1}[a-z]{1}[0-9]{2}$|^[a-z]{3}[0-9]{2}[a-z]{1}[0-9]{1}$/i;

const brazilianLicensePlateRegex = /^[a-z]{3}-?[0-9]{4}$/i;

/**
* Validates if a Brazilian license plate (placa de carro) is valid.
* Supports both the old Brazilian format (ABC-1234) and the new Mercosul format (ABC1D23).
* Validates if a Brazilian license plate (placa de carro ou moto) is valid.
* Supports the old Brazilian format (ABC-1234) and the Mercosul format for cars (ABC1D23) and motorcycles (ABC12D3).
*
* @param {string} value - The license plate value to be validated.
* @returns {boolean} True if the license plate is valid, false otherwise.
Expand All @@ -13,8 +14,8 @@ const brazilianLicensePlateRegex = /^[a-z]{3}-?[0-9]{4}$/i;
* ```typescript
* isValidLicensePlate("abc1234"); // true (Brazilian format)
* isValidLicensePlate("ABC-1234"); // true (Brazilian format with hyphen)
* isValidLicensePlate("abc1d23"); // true (Mercosul format)
* isValidLicensePlate("ABC1D23"); // true (Mercosul format)
* isValidLicensePlate("abc1d23"); // true (Mercosul format - Car)
* isValidLicensePlate("ABC12D3"); // true (Mercosul format - Motorcycle)
* isValidLicensePlate("invalid"); // false
* ```
*/
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