---
title: Boundaries
slug: Web/JavaScript/Guide/Regular_Expressions/Boundaries
translation_of: Web/JavaScript/Guide/Regular_Expressions/Assertions
translation_of_original: Web/JavaScript/Guide/Regular_Expressions/Boundaries
---
<p>重定向至 <a class="redirect" href="/zh-CN/docs/Web/JavaScript/Guide/Regular_Expressions/Assertions">断言</a></p>