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@koph-npm/browser-locker

v0.0.2

Published

> Mutex simples entre abas do navegador usando `localStorage` + `StorageEvent`.

Readme

@koph-npm/browser-locker

Mutex simples entre abas do navegador usando localStorage + StorageEvent.

Este utilitário permite coordenar o acesso a recursos compartilhados entre diferentes abas abertas de uma mesma aplicação. Ideal para evitar execuções concorrentes de operações como refresh token, jobs programados, etc.


📦 Instalação

npm install @koph-npm/browser-locker

🚀 Uso básico

import { Locker } from '@koph-npm/browser-locker';

const tokenLocker = Locker("token-locked");

await tokenLocker.block(5000); // tenta adquirir o lock por 5s
try {
  // seção crítica - apenas uma aba entra aqui
  const data = await fetch("/api/refresh-token").then(r => r.json());
  localStorage.setItem("api_token", data.token);
} finally {
  tokenLocker.release();
}

🧠 API

Locker(key: string)

Retorna um objeto com duas funções:

await block(timeoutMs?: number): Promise<number>

  • Tenta adquirir o lock pela chave fornecida.
  • Retorna:
    • 0 se conseguiu imediatamente
    • 1 se aguardou outra aba liberar
    • 2 se expirou o tempo de espera

release(): void

  • Libera o lock imediatamente

⚠️ Observações

  • Usa localStorage para persistir o lock entre abas.
  • Remove locks expirados automaticamente.
  • Não impede concorrência entre abas diferentes de domínios distintos.

📄 Licença

MIT


👤 Autor

Koph [email protected]


🔗 Repositório

https://github.com/koph-git/ts-lib