try/catch语句
时间: 2023-09-08 16:17:29 浏览: 117
try/catch语句是JavaScript中处理异常的一种标准方式。它的基本语法是在try代码块中编写可能导致错误的代码,如果出现异常,程序会跳转到catch代码块中进行异常处理。
在try/catch语句中,catch代码块是可选择的,用于捕获并处理异常。如果try代码块中发生异常,程序会跳转到catch代码块中执行相应的异常处理逻辑。而finally代码块是一定会执行的,无论try代码块是否发生异常,finally代码块都会被执行。
异常抛出后会一直返回调用函数(或者说上一层函数),直到被catch到。因此,可以将catch语句写在一起,以便对多个异常进行统一处理,从而使代码更加整洁和方便。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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