在匿名闭包函数中定义全局函数

Question

Is there any way to define within closure a global function? I would like to define one global function so I can call it with onclick event.

(function(){

 var private = 'private msg';

 function myprivate() {
   alert(private)
 }

 function wanttobeglobal() {
   alert(global) 
 }

})();

Is there any way?

Answer 1

Assign the function to window :

(function(){

 var private = 'private msg';

 function myprivate() {
   alert(private)
 }

 window.wanttobeglobal = function wanttobeglobal() {
   alert(global) 
 }

})();

Answer 2

Very bad practice, but the only way short of declaring the variable outside the initial closure is to implicitly create a global variable.

wanttobeglobal = function() {
  alert(global);
};

The better way, if you can modify code outside of the closure, is with var :

var wanttobeglobal;

(function() {
  // ...
  wanttobeglobal = function() {
    alert(global);
  };
})();