> For the complete documentation index, see [llms.txt](https://docs.exoclick.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.exoclick.com/tutorials/tutorials/publishers-tutorials/popunder-redirect-examples.md).
# Popunder Redirect Examples
The following page lists a series of use cases where you can use the **Redirect Popunder URL** format of the popunder to trigger the ad under certain conditions.
## Serve popunders under Adblock
Assuming that you don't want to use the **Inline + Remote Script** version of the popunder, you can follow these steps:
{% stepper %}
{% step %}
Create a `.js` file called `ads.js` containing the following code:
```js
isAdblockActive = false;
```
{% endstep %}
{% step %}
Create another file called `domains.js` containing the following code:
```js
let storedDomain = null;
fetch("https://ads.exoclick.com/adblock-domains.php")
.then(r => {
if (!r.ok) {
throw new Error("Network response was not ok (" + r.status + ")");
}
return r.json();
})
.then(data => {
if (data.success && data.domain) {
storedDomain = data.domain;
} else {
logError("API returned error: " + (data.message || "Unknown error"));
}
})
.catch(err => {
logError("Fetch failed: " + err.message);
});
```
{% endstep %}
{% step %}
Place both files on your website’s server. Then, on your site’s HTML, add the following:
```html
Redirect Domain
```
The Redirect Popunder will trigger when the user clicks on the link with id `rd`. Then, if Adblock is enabled on the browser, `isAdBlockActive` will be set to true because `ads.js` will be blocked, allowing the redirect popunder to use the dynamic adblock domain retrieved from `domains.js`. The `&block=1` parameter allows the popunder to register the traffic as Adblock.
{% endstep %}
{% endstepper %}
## Serve SFW ads
The `ex_av` and `block_ad_types` parameters can be added to the Redirect Domain Popunder to register the user as someone who has or hasn’t passed Age Verification and to block NSFW ads.
The following code is based on [**How to serve SFW ads with ExoClick**](/tutorials/tutorials/publishers-tutorials/serve-sfw-ads.md) and loads the Redirect Domain Popunder depending on whether the user has the `userVerified` cookie, which is set once the user has passed Age Verfication.
```html
Redirect Domain
```
## Block campaigns with specific labels when the website has a specific parameter on its URL
The following code is based on [**How To Dynamically Block Ad Types Using data-block-ad-types**](/tutorials/tutorials/publishers-tutorials/dynamically-block-ads-using-data-block-ad-types.md) and reads the value from a specific parameter of the URL where the popunder will be loaded. This can be useful for publishers who identify their sources of traffic by using a specific parameter.
In this example, we are looking for a parameter called `utm_source` and the label we are going to block is **Verified False Positives**:
```html
Redirect Domain
```
---
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