---
lang: en
title: 'API docs: core.jsonprimitive'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.core.jsonprimitive.html
---

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[Home](./index.md) &gt; [@loopback/core](./core.md) &gt; [JSONPrimitive](./core.jsonprimitive.md)

## JSONPrimitive type

Type definition for JSON

<b>Signature:</b>

```typescript
export declare type JSONPrimitive = string | number | boolean | null;
```