# MD for: https://www.mercadopago.com.br/developers/pt/docs/checkout-bricks/payment-brick/advanced-features/additional-callbacks.md

\# Additional callbacks When initializing Brick it is possible to configure additional callbacks, which provide the integrator with more information during the Brick execution. ## onBinChange The \`onBinChange\` callback is used to get the \*\*bin\*\* of the card being inserted into the Brick. This callback is called on the fly whenever the card bin is updated. 

* [javascript ](#editor%5F1)
* [react-jsx ](#editor%5F2)
javascript react-jsx 

```
const settings = {
  ...,
  callbacks: {
  ...
  onBinChange: (bin) => {
  // callback called whenever card bin is changed
  console.log(bin);
  },
  }
};
```

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```
<Payment
 ...,
 onBinChange={bin => {
  console.log(bin);
 }}
/>
```

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\> WARNING > > Attention > > The card bin returned by the \`onBinChange\` callback is the same as the one entered by the user in the card number field, that is, for each change the user makes in this field, a new event will be triggered by the callback. Therefore, only consider the bin valid and reliable to be used after the submit event is fired by the \`onSubmit\` callback.