在下面的示例中,当调用functionA()
时,this
关键字引用了包含的对象,因此我可以访问其属性(例如theValue
)
我的问题:我如何从嵌套的myObj
中引用functionB()
的属性?
var myObj = {
theValue: "The rain in Spain",
functionA: function() {
alert(this.theValue);
},
moreFunctions: {
functionB: function() {
alert(????.theValue);
}
}
}
myObj.functionA();
myObj.moreFunctions.functionB();
提前致谢。
最佳答案
立即援救!
var myObj = (function () {
var that = {
theValue: "The rain in Spain",
functionA: function() {
alert(this.theValue); // or that.theValue, both work here
},
moreFunctions: {
functionB: function() {
alert(that.theValue);
}
}
};
return that;
}()); // <-- immediate invocation !!
您可以进一步分解它:
var myObj = (function () {
function functionA() {
alert(that.theValue);
}
function functionB() {
alert(that.theValue);
}
var that = {
theValue: "The rain in Spain",
functionA: functionA,
moreFunctions: {
functionB: functionB
}
}
return that;
}());
如果您熟悉OOP,则可以使用它来创建私有(private)变量。