---
title: nrDelDomainSubstitution
source: https://docs.newrelic.com/docs/streaming-video-&-ads/installation/roku/agent-api/domain-management/nrdeldomainsubstitution
---

## Syntax

```js
  nrDelDomainSubstitution(nr as object, pattern as String) as Void
```

## Description

Delete a matching pattern created with `nrAddDomainSubstitution`.

## Arguments

| Arguments | Description             |
| --------- | ----------------------- |
| `nr`      | New Relic Agent object. |
| `pattern` | Regex pattern.          |
| `subs`    | Substitution string.    |

## Return

Nothing.

## Example

```js
  	nrDelDomainSubstitution(nr, "^.+\.my\.domain\.com$")
```