如何使用原型方法的構造

Question

返回塊內我有一個像下面

var Example = (function() { 
    function Example(opt) { 
    this.opt = opt; 
    return{ 
     function(){ console.log(this.check()); } // Here is an Error 
    } 
    } 
    Example.prototype.check = function() { 
    console.infor('123'); 
    }; 
    return Example; 
})(); 

var ex = new Example({ a:1 }); 

我知道我做錯了，但找不出來做到這一點的方式構造。我想在對象返回中使用原型方法。請幫助我。

Answer 1

如果您想在構建實例時運行check()，爲何不在構造函數中調用它？

var Example = (function() { 
    function Example(opt) { 
    this.opt = opt; 
    this.check(); //this gets called when instances are made 
    } 
    Example.prototype.check = function() { 
    console.infor('123'); 
    }; 
    return Example; 
})(); 

//so `ex` is an instance of the Example Constructor 
//and check gets called when you build it 
var ex = new Example({ a:1 }); 

Answer 2

看

function Example(opt) { 
    this.opt = opt; 
    this.check() 
} 
Example.prototype.check = function() { 
    console.info('123'); 
};