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---
lang: en
title: 'API docs: filter.filtertemplate'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/filter
permalink: /doc/en/lb4/apidocs.filter.filtertemplate.html
---
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[Home](./index.md) > [@loopback/filter](./filter.md) > [filterTemplate](./filter.filtertemplate.md)
## filterTemplate() function
**Signature:**
```typescript
export declare function filterTemplate(strings: TemplateStringsArray, ...keys: any[]): (ctx: AnyObject) => any;
```
## Parameters
<table><thead><tr><th>
Parameter
</th><th>
Type
</th><th>
Description
</th></tr></thead>
<tbody><tr><td markdown="1">
strings
</td><td markdown="1">
TemplateStringsArray
</td><td markdown="1">
</td></tr>
<tr><td markdown="1">
keys
</td><td markdown="1">
any\[\]
</td><td markdown="1">
</td></tr>
</tbody></table>
**Returns:**
(ctx: AnyObject) => any