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---
lang: en
title: 'API docs: rest.sanitizejsonparse'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/rest
permalink: /doc/en/lb4/apidocs.rest.sanitizejsonparse.html
---
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[Home](./index.md) > [@loopback/rest](./rest.md) > [sanitizeJsonParse](./rest.sanitizejsonparse.md)
## sanitizeJsonParse() function
Factory to create a reviver function for `JSON.parse` to sanitize keys
**Signature:**
```typescript
export declare function sanitizeJsonParse(reviver?: (key: any, value: any) => any, prohibitedKeys?: string[]): (key: string, value: any) => any;
```
## Parameters
<table><thead><tr><th>
Parameter
</th><th>
Type
</th><th>
Description
</th></tr></thead>
<tbody><tr><td markdown="1">
reviver
</td><td markdown="1">
(key: any, value: any) => any
</td><td markdown="1">
_(Optional)_ Reviver function
</td></tr>
<tr><td markdown="1">
prohibitedKeys
</td><td markdown="1">
string\[\]
</td><td markdown="1">
_(Optional)_ An array of keys to be rejected
</td></tr>
</tbody></table>
**Returns:**
(key: string, value: any) => any