alessioalex/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="example1">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
  <h3>Check your console to see the output, press F12 and go to the console tab.</h3>

  You can also view and edit the code if you press the top right button.
<script id="jsbin-javascript">
// Note: ES6 code, works in modern browsers

const makeAjaxRequest = () => { /* production code */ };

// say we have a User class somewhere
class User {
  trackAction(action, category) {
    makeAjaxRequest({ action, category, isLoggedIn: this.loggedIn });
  }
}

const loggedInUser = new User();

// elsewhere in the code..
loggedInUser.fullName = 'Bob Jenkins';
loggedInUser.id = 184643;
loggedInUser.trackAction('add-product', 'shoes');

const originalFn = loggedInUser.trackAction;

// print the arguments of the function to the console
// yet still call original function with right context and arguments
loggedInUser.trackAction = function() {
  // convert function arguments to array
  const args = Array.prototype.slice.call(arguments);

  console.log('trackAction called for %s with the following arguments: %s.', this.fullName, args.join(', '));

  // being a good citizen means returning the result of the original function
  // and making sure it is executed with the correct context and arguments
  return originalFn.apply(this, args);
};

loggedInUser.trackAction('add-product', 'shoes');
// trackAction called for Bob Jenkins with the following arguments: add-product, shoes.
</script>


<script id="jsbin-source-javascript" type="text/javascript">// Note: ES6 code, works in modern browsers

const makeAjaxRequest = () => { /* production code */ };

// say we have a User class somewhere
class User {
  trackAction(action, category) {
    makeAjaxRequest({ action, category, isLoggedIn: this.loggedIn });
  }
}

const loggedInUser = new User();

// elsewhere in the code..
loggedInUser.fullName = 'Bob Jenkins';
loggedInUser.id = 184643;
loggedInUser.trackAction('add-product', 'shoes');

const originalFn = loggedInUser.trackAction;

// print the arguments of the function to the console
// yet still call original function with right context and arguments
loggedInUser.trackAction = function() {
  // convert function arguments to array
  const args = Array.prototype.slice.call(arguments);

  console.log('trackAction called for %s with the following arguments: %s.', this.fullName, args.join(', '));

  // being a good citizen means returning the result of the original function
  // and making sure it is executed with the correct context and arguments
  return originalFn.apply(this, args);
};

loggedInUser.trackAction('add-product', 'shoes');
// trackAction called for Bob Jenkins with the following arguments: add-product, shoes.</script></body>
</html>

## jsbin.kuhukal.js
// Note: ES6 code, works in modern browsers

const makeAjaxRequest = () => { /* production code */ };

// say we have a User class somewhere
class User {
  trackAction(action, category) {
    makeAjaxRequest({ action, category, isLoggedIn: this.loggedIn });
  }
}

const loggedInUser = new User();

// elsewhere in the code..
loggedInUser.fullName = 'Bob Jenkins';
loggedInUser.id = 184643;
loggedInUser.trackAction('add-product', 'shoes');

const originalFn = loggedInUser.trackAction;

// print the arguments of the function to the console
// yet still call original function with right context and arguments
loggedInUser.trackAction = function() {
  // convert function arguments to array
  const args = Array.prototype.slice.call(arguments);

  console.log('trackAction called for %s with the following arguments: %s.', this.fullName, args.join(', '));

  // being a good citizen means returning the result of the original function
  // and making sure it is executed with the correct context and arguments
  return originalFn.apply(this, args);
};

loggedInUser.trackAction('add-product', 'shoes');
// trackAction called for Bob Jenkins with the following arguments: add-product, shoes.
	<!DOCTYPE html>
	<html>
	<head>
	<meta name="description" content="example1">
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	</head>
	<body>
	<h3>Check your console to see the output, press F12 and go to the console tab.</h3>

	You can also view and edit the code if you press the top right button.
	<script id="jsbin-javascript">
	// Note: ES6 code, works in modern browsers

	const makeAjaxRequest = () => { /* production code */ };

	// say we have a User class somewhere
	class User {
	trackAction(action, category) {
	makeAjaxRequest({ action, category, isLoggedIn: this.loggedIn });
	}
	}

	const loggedInUser = new User();

	// elsewhere in the code..
	loggedInUser.fullName = 'Bob Jenkins';
	loggedInUser.id = 184643;
	loggedInUser.trackAction('add-product', 'shoes');

	const originalFn = loggedInUser.trackAction;

	// print the arguments of the function to the console
	// yet still call original function with right context and arguments
	loggedInUser.trackAction = function() {
	// convert function arguments to array
	const args = Array.prototype.slice.call(arguments);

	console.log('trackAction called for %s with the following arguments: %s.', this.fullName, args.join(', '));

	// being a good citizen means returning the result of the original function
	// and making sure it is executed with the correct context and arguments
	return originalFn.apply(this, args);
	};

	loggedInUser.trackAction('add-product', 'shoes');
	// trackAction called for Bob Jenkins with the following arguments: add-product, shoes.
	</script>



	<script id="jsbin-source-javascript" type="text/javascript">// Note: ES6 code, works in modern browsers

	const makeAjaxRequest = () => { /* production code */ };

	// say we have a User class somewhere
	class User {
	trackAction(action, category) {
	makeAjaxRequest({ action, category, isLoggedIn: this.loggedIn });
	}
	}

	const loggedInUser = new User();

	// elsewhere in the code..
	loggedInUser.fullName = 'Bob Jenkins';
	loggedInUser.id = 184643;
	loggedInUser.trackAction('add-product', 'shoes');

	const originalFn = loggedInUser.trackAction;

	// print the arguments of the function to the console
	// yet still call original function with right context and arguments
	loggedInUser.trackAction = function() {
	// convert function arguments to array
	const args = Array.prototype.slice.call(arguments);

	console.log('trackAction called for %s with the following arguments: %s.', this.fullName, args.join(', '));

	// being a good citizen means returning the result of the original function
	// and making sure it is executed with the correct context and arguments
	return originalFn.apply(this, args);
	};

	loggedInUser.trackAction('add-product', 'shoes');
	// trackAction called for Bob Jenkins with the following arguments: add-product, shoes.</script></body>
	</html>