node.js中的“global”对象

global window

parseInt setTimeout

a1 = console.log;  // Will be accessed from b.js
global.a2 = console.log;  // Will be accessed from b.js

require('./b.js');

b1('a: b1');
b2('a: b2');
global.b1('a: global.b1');
global.b2('a: global.b2');

a1('b: a1');
a2('b: a2');
global.a1('b: global.a1');
global.a2('b: global.a2');

b1 = console.log;  // Will be accessed from a.js
global.b2 = console.log;  // Will be accessed from a.js

b: a1
b: a2
b: global.a1
b: global.a2
a: b1
a: b2
a: global.b1
a: global.b2

app.js var myvar='someval' .js