如果我只有一個屬性的引用，我可以到達屬性的對象嗎？

Question

我有一個變量中的對象的屬性的引用，是否有可能訪問該屬性所屬的對象？

Answer 1

var obj = { 
    p1: 1, 
    p2: function(){ 
     return this; 
    }, 
    p3: obj, 
    p4: function() { 
     return obj; 
    } 
} 

// v1 is now integer, we cannot get actual `obj` from this `v1` 
var v1 = obj.p1; 

// `v2()` returns `window` object (or current context object), 
// so if `obj` is created only in global context (or current 
// context which you're calling `v2()`), you can get reference to `obj` 
var v2 = obj.p2; 

// as @Ignacio mentioned, you can use `v3` as reference to `obj` 
var v3 = obj.p3; 

// `v4()` also reference to `obj` 
var v4 = obj.p4; 

Answer 2

除非屬性值本身包含對該對象的引用。