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---
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>
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