If you try to wrap an object with an anonymous function, you'll receive an error message

Question

If you try to wrap an object with an anonymous function, you'll receive an error message

Consider the following straightforward example.

(function() { 
var message = {
   display: function() {
        alert('hello');
    }
 };
})();

When trying to implement

message.display();

An error is triggered stating

ReferenceError: message is not defined

. However, using the message object without being enclosed by an anonymous function works just fine.

So, how can I utilize the message object outside of the anonymous function or on another page?

javascript anonymous-function

Answer 1

Answer №1

Perhaps using the module pattern is what you intended. Here's a simple example:

var message = (function() { 
 return {
   display: function() {
        alert('hello');
    }
 };
}());

This approach becomes more valuable when closures are involved, such as:

var message = (function() { 
   var someValue = 10;
   return {
      display: function() {
         alert('hello');
      },
      multiplyBySomeValue(n) {
         return someValue * n;
      }
   };
}());
console.log(message.multiplyBySomeValue(5)); // 50

Answer 2

Perhaps using the module pattern is what you intended. Here's a simple example:

var message = (function() { 
 return {
   display: function() {
        alert('hello');
    }
 };
}());

This approach becomes more valuable when closures are involved, such as:

var message = (function() { 
   var someValue = 10;
   return {
      display: function() {
         alert('hello');
      },
      multiplyBySomeValue(n) {
         return someValue * n;
      }
   };
}());
console.log(message.multiplyBySomeValue(5)); // 50

If you try to wrap an object with an anonymous function, you'll receive an error message

Answer №1

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