---
lang: en
title: 'API docs: boot.bindingkeysexcludedfromsubapp'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/boot
permalink: /doc/en/lb4/apidocs.boot.bindingkeysexcludedfromsubapp.html
---

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[Home](./index.md) &gt; [@loopback/boot](./boot.md) &gt; [bindingKeysExcludedFromSubApp](./boot.bindingkeysexcludedfromsubapp.md)

## bindingKeysExcludedFromSubApp variable

Binding keys excluded from a sub application. These bindings booted from the sub application won't be added to the main application.

<b>Signature:</b>

```typescript
bindingKeysExcludedFromSubApp: string[]
```