# Opt-out

When opt-out is enabled, the SDK stops sending all events.

{% hint style="info" %}
The React SDK is built on top of the JavaScript SDK. The opt-out API is the same as the JavaScript SDK.
{% endhint %}

## Configuration at Initialization

{% tabs %}
{% tab title="React" %}

```javascript
import { createInstance, HackleProvider } from "@hackler/react-sdk";

const config = {
    optOutTracking: true
};

const hackleClient = createInstance("YOUR_BROWSER_SDK_KEY", config);

ReactDOM.render(
  <HackleProvider hackleClient={hackleClient}>
    <YourApp />
  </HackleProvider>,
  document.getElementById('root')
);
```

{% endtab %}

{% tab title="Next.js" %}

```javascript
import { createInstance, HackleProvider } from "@hackler/react-sdk";

const config = {
    optOutTracking: true
};

const hackleClient = createInstance("YOUR_BROWSER_SDK_KEY", config);

function MyApp({ Component, pageProps }) {
  return (
    <HackleProvider hackleClient={hackleClient} supportSSR>
      <Component {...pageProps} />
    </HackleProvider>
  )
}

export default MyApp
```

{% endtab %}
{% endtabs %}

## Runtime Opt-out Control

```javascript
hackleClient.setOptOutTracking(true);
hackleClient.setOptOutTracking(false);
const isOptOut = hackleClient.isOptOutTracking();
```

## Persistence Management

{% hint style="warning" %}
The value resets to the value configured in Config on page refresh or revisit.
{% endhint %}

```javascript
function saveOptOutState(optOut) {
    localStorage.setItem("hackle_opt_out", JSON.stringify(optOut));
    hackleClient.setOptOutTracking(optOut);
}

function getOptOutConfig() {
    const optOut = JSON.parse(localStorage.getItem("hackle_opt_out") || "false");
    return {
        optOutTracking: optOut
    };
}

const config = getOptOutConfig();
const hackleClient = Hackle.createInstance("YOUR_BROWSER_SDK_KEY", config);
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hackle.io/en/development-guide/react/react-optout.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.