javascript - 在JavaScript中声明多个变量(Declaring Multiple Variables in JavaScript)

Question

In JavaScript, it is possible to declare multiple variables like this:(在JavaScript中，可以这样声明多个变量：)

var variable1 = "Hello World!"; var variable2 = "Testing..."; var variable3 = 42; ...or like this:(...或像这样：) var variable1 = "Hello World!", variable2 = "Testing...", variable3 = 42; Is one method better/faster than the other?(一种方法比另一种方法更好/更快吗？)   ask by Steve Harrison translate from so

Answer 1

The first way is easier to maintain.(第一种方法更易于维护。)

Each declaration is a single statement on a single line, so you can easily add, remove, and reorder the declarations.(每个声明都是一行上的单个语句，因此您可以轻松地添加，删除和重新排序声明。) With the second way, it is annoying to remove the first or last declaration because they contain the var keyword and semicolon.(使用第二种方法时，删除第一个或最后一个声明很烦人，因为它们包含var关键字和分号。) And every time you add a new declaration, you have to change the semicolon in the old line to a comma.(每次添加新的声明时，都必须将旧行中的分号更改为逗号。)