【学习笔记】JavaScript编码规范-变量

总是使用var声明变量，不然将其变为全局变量。我们要想办法避免全局空间污染。

//bad
aaa = new AAA();

//good
var aaa = new AAA();

//God bless!

使用var声明每个变量，这样很容易添加新的变量声明，而不用去担心a，替换a

//bad
var items = getItems();
goSportsTeam = true ;
dragonball = 'z';

//good
var items = getItems();
var goSportsTeam = true;
var dragonball = 'z';

//God bless!

在作用域定点对变量赋值，这有助于避免变量声明问题与声明提升相关问题。

1:7 And God made the firmament,and divided the waters which where under the firament from the waters which were above the firmament :and it was so.