Closure Example 1

Developer
John Duprey
Size
2,012 Kb
Views
6,072
  1. Closure Example 1 Previews
  2. Closure Example 1 HTML Codes
  3. Closure Example 1 JS Codes

How do I make an closure example 1?

This contrived example shows a common mistake made in invoking functions asynchronous through callbacks. The scope (value of variables) may not be what you expect them to be. In order to demonstrate an understanding of closures. Use one to solve this problem.. What is a closure example 1? How do you make a closure example 1? This script and codes were developed by John Duprey on 23 January 2023, Monday.

Closure Example 1 Previews
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Closure Example 1 - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Closure Example 1</title>
</head>
<body> <script src="js/index.js"></script>
</body>
</html>

Closure Example 1 - Script Codes JS Codes

/*
This contrived example shows a common mistake made in invoking functions asynchronous through callbacks. The scope (value of variables) may not be what you expect them to be. In order to demonstrate an understanding of closures. Use one to solve this problem.
*/
// This example uses the console, be sure to choose a codepen view that displays the console
window.console.clear();
window.console.log("====== Start ======");
/* Consider the following code. There is an array of objects called items. It iterates through each item and "operates" on each item in an asynchronous anonymous function. In this case, the function merely writes to the console the object's id. If you look in the console output, you will see that the same object id value is output. 1. Why is that? 2. How might you fix it with a closure?
*/
var items = [ {id: 1}, {id: 2}, {id: 3}
];
for( var i = 0; i < items.length; i++ ){ var item = items[i]; window.setTimeout( function(){ window.console.log(item.id); }, 1000 ); }
Closure Example 1 - Script Codes
Closure Example 1 - Script Codes
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Developer John Duprey
Username jduprey
Uploaded January 23, 2023
Rating 3
Size 2,012 Kb
Views 6,072
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