天工造物局

用Node.js单独运行js文件时，其中定义的alert不可用

alert is not part of JavaScript, it's part of the window object provided by web browsers. 

var name = "The Window";

function ttt() {    

return(this.name);
}
alert(ttt.call(window);    
//alert(window);

var object = {    

name : "My Object",    
getNameFunc : function(){        

return function(){            

return this.name;       
 };    
}};

console.log(object.getNameFunc()());    // console    The Windowvar name = "The Window";

var object = {   
name : "My Object",    
getNameFunc : function(){       
var that = this;       
return function(){           
return that.name;       
 };    
}};

console.log(object.getNameFunc()());        //console     My Object

如果是在Node.js中运行的话，window会提示“undedined”。