问题
I have defined a object in a js file:
myobj.js
MyObj={
test: {
value: {a: 10, b: 7},
startTest: function(){
var x = this.value.a;
var y = this.value.b;
return {x: x, y: y};
}
}
}
In another js file I call this object function:
other.js
mytest = MyObj.test.startTest //assign starTest function to mytest
var a = mytest().x;
var b = mytest().y;
my index.html:
<body>
<script src="myobj.js"></script>
<script src="other.js"></script>
</body>
I got the error from firebug in myobj.js:
"
this.value" is not defined in the line "this.value.a;"
Why??
回答1:
mytest = MyObj.test.startTest
This gives you a function without context. If you call this function directly then this is window.
You want to all test.startTest() so that this is test
An excellent guide on this
来源：https://stackoverflow.com/questions/5700054/variable-is-not-defined-error-why