什么时候应该在花括号后使用分号?

问题描述

我多次看到在函数声明之后或在模块模式脚本的匿名返回"函数之后使用分号.花括号后面什么时候用分号比较合适?

Many times I've seen a semicolon used after a function declaration, or after the anonymous "return" function of a Module Pattern script. When is it appropriate to use a semicolon after curly braces?

推荐答案

在语句后使用分号.这是一个声明:

You use a semicolon after a statement. This is a statement:

var foo = function() {
  alert("bar");
};

因为它是一个变量赋值(即创建一个匿名函数并将其赋值给一个变量).

because it is a variable assignment (i.e. creating and assigning an anonymous function to a variable).

想到的不是语句的两件事是函数声明:

The two things that spring to mind that aren't statements are function declarations:

function foo() {
  alert("bar");
}

和块:

{
  alert("foo");
}

注意:没有分号的相同块结构也适用于 for、do 和 while 循环.

Note: that same block construct without semi-colon also applies to for, do and while loops.

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