node.js - module.exports TypeError 并且没有方法

Question

t1.js

module.exports = function(app) {
    return new obj(app);
};

var obj = function(app) {
    this.app = app;

};

obj.prototype.query = function() {


    return "ok";
};

t2.js

var a = require('./t1.js');

console.log(a.query()); 

执行 Node t2.js

报告

console.log(a.query());
                  ^
TypeError: Object function (app) {
    return new obj(app);
} has no method 'query'

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Answer 1

问题在于 require('./t1.js') 返回您导出的函数。

解决方案如下:

var a = require('./t1.js')();
/* or...
var myApp = {};
var a = require('./t1.js')(myApp);
*/
console.log(a.query());  //now it's "ok"