---
title: Nullish value
slug: Glossary/Nullish
tags:
  - 'Null'
  - undefined
  - 原始类型
  - 空值
translation_of: Glossary/Nullish
---
<p>{{Draft}}</p>

<p>一个 nullish 值要么是 {{JSxRef("null")}} 要么是 {{JSxRef("undefined")}}。nullish 值总是 <a href="/zh-CN/docs/Glossary/Falsy">falsy</a>.。</p>

<section id="Quick_Links">
<ul>
 <li class="hidden">{{Page("/en-US/docs/Glossary/Primitive", "Quick_Links")}}</li>
</ul>
</section>