在nodejs中導出變量和函數

Question

我想將一組全局變量和函數從一個Javascript文件導出到nodejs中的另一個。

從 節點js.include.js

var GLOBAL_VARIABLE = 10; 

exports.GLOBAL_VARIABLE = GLOBAL_VARIABLE; 

module.exports = { 

    add: function(a, b) { 
     return a + b; 
    } 

}; 

成測試節點-JS-include.js：

var includes = require('./node-js-include'); 

process.stdout.write("We have imported a global variable with value " + includes.GLOBAL_VARIABLE); 

process.stdout.write("\n and added a constant value to it " + includes.add(includes.GLOBAL_VARIABLE, 10)); 

但是變量;我得到以下輸出：

We have imported a global variable with value undefined 
and added a constant value to it NaN 

爲什麼不GLOBAL_VARIABLE出口？

Answer 1

2種方法來解決這個問題：

module.exports.GLOBAL_VARIABLE = GLOBAL_VARIABLE; 

module.exports.add: function(a, b) { 
    return a + b; 
}; 

---

module.exports.GLOBAL_VARIABLE = GLOBAL_VARIABLE; 

module.exports = { 
    add: function(a, b) { 
     return a + b; 
    }, 
    GLOBAL_VARIABLE: GLOBAL_VARIABLE 
};