When you want to extract only a part of a string, you use the "substring() method" in JavaScript. In this article, I will explain the basic usage of substring(), as well as its behavior when arguments ...

This post is about how to effectively use the String.prototype.substring() method in JavaScript. We go through a few examples to understand how it works, play around to observe a few patterns and ...

转载 最新推荐文章于 2026-07-09 16:40:36 发布 · 2.3k 阅读 本文详细介绍了JavaScript中用于字符串截取的三种方法：substring()、substr()和slice()，包括它们的相同点和不同点。相同点是都不会改变原字符 ...

1. substring ()到底在做什么：先理解它的设计逻辑 substring () 是JavaScript中String对象的一个原生方法，用来从字符串中提取一段连续字符，返回一个新的字符串，而不修改原字符串。乍一听很简单，但它真正有意思的地方在于参数规则和边界行为。