如何在闭包内部访问变量

Question

Can some help on to read the variables inside the closures. I know by having a function with return statement i can get the value.

var getCounter = (function () {
    var counter = 10;
    return function () {return counter;}
})();

getCounter(); produces 10

Is there any way to access or read the variable without the return function ?

Answer 1

var getCounter = (function () {
    this.counter = 10;
})();

console.log(counter);

or

var getCounter = (function () {
        counter = 10;
    })();

    console.log(counter);

jsfiddle

Answer 2

I dont know why you need a closure here,

var getCounter = (function () {
  counter = 10;
  return counter;
})();
// As you wrote a closure it is self executed so getCounter variable has the counter value; 
var x = getCounter; 

Answer 3

You can also try this,

 var counter; var getCounter = (function() { counter = 10; })();