单个逗号分隔的变量声明和多个声明之间有什么区别? [英] What is the difference between a single comma-separated variable declaration, and multiple declarations?

问题描述

逗号分隔声明有什么区别?

What is the difference between comma separated declaration:

var a=0, b=0, c=0;

和多行声明:

var a=0;
var b=0;
var c=0;

代码性能是否有差异?

推荐答案

以逗号分隔的声明只是简写.执行方面没有区别.但是，如果您声明了很多变量，它可以帮助减小javascript文件的大小.

The comma separated declaration is just a short hand. Executing-wise there's no difference. But it can help reduce the size of your javascript file if you are declaring a lot of variables.

您甚至可以:

var a = 1, b = 'string', c = new Date();

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