How to add jQuery from a CDN?

Adding jQuery to a web page from a Content Delivery Network (CDN) is a common practice because it allows you to use the speed and reliability of a third-party server.

Choose a jQuery CDN

Select a CDN provider that hosts jQuery. Common choices include Google, Microsoft, and jQuery's official CDN. For this example, we'll use the Google CDN.

Include jQuery in Your HTML

In the <head> section of your HTML document, add a <script> tag with the CDN URL.

<!DOCTYPE html> <html> <head> <title>My Web Page</title> <!-- Include jQuery from the Google CDN --> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> </head> <body> <!-- Your web page content here --> </body> </html>

Specify the jQuery Version

In the src attribute of the <script> tag, you can specify the version of jQuery you want to use. In the example above, we've used version 3.5.1. You can replace this version number with the one you need.

Use jQuery in Your JavaScript

After including jQuery, you can start using it in your JavaScript code. Here's a simple example of selecting an element and performing an action:

<!DOCTYPE html> <html> <head> <title>My Web Page</title> <!-- Include jQuery from the Google CDN --> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> </head> <body> <button id="myButton">Click Me</button> <script> // Use jQuery to handle a button click event $(document).ready(function () { $("#myButton").click(function () { alert("Button clicked!"); }); }); </script> </body> </html>

In this example, we use $(document).ready() to ensure that the code inside it is executed only after the document has fully loaded. Then, we use the $ symbol to access jQuery functions, such as $("#myButton") to select the button with the ID "myButton" and .click() to attach a click event handler.

Google CDN

<head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> </head>

Microsoft CDN

<head> <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.3.1.min.js"></script> </head>

If you wish to use jQuery CDN other than Google or Microsoft hosted jQuery library, you might consider using this and ensures uses the latest version of jQuery:

<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>

Conclusion

A jQuery Content Delivery Network (CDN) is a convenient way to include the jQuery library in web projects. By referencing the jQuery library hosted on a CDN through a <script> tag in your HTML, you can use the speed and reliability of a third-party server to load jQuery, making it readily available for use in your web page's JavaScript code without the need for local installation or hosting.






Related Topics
  1. jQuery Interview Questions (Part-2)
  2. jQuery Interview Questions (Part-3)
  3. Is jQuery a programming language?
  4. Why do we need to go for JQuery?
  1. How to check jQuery version?
  2. How to multiple version of jQuery?
  3. Advantages of minified version of JQuery
  4. How do I check if the DOM is ready?
  5. How to Use the jQuery load() Method
  6. Difference between document.ready() and body onload()?
  7. Is jQuery is a replacement of JavaScript?
  8. JQuery or JavaScript which is quicker in execution?
  9. What is the use of param() method in jquery
  10. How to work with jQuery parent(), children() and siblings()?
  11. Difference between parent() and parents() in jQuery?
  12. What does jQuery data() function do?
  13. How do you check if an element exists or not in jQuery?
  14. How do I check if an HTML element is empty using jQuery?
  15. How to run an event handler only once in jQuery?
  16. How to Disable or Enable a Form Element Using jQuery
  17. Hide and show image on button click using jQuery
  18. Difference Between Prop and Attr in jQuery
  19. How do I check if an element is hidden in jQuery?
  20. Difference between return false; and e.preventDefault()
  21. What is each() function in jQuery? How do you use it?
  22. Which one is more efficient, document.getElementbyId( "myId") or $("#myId)?
  23. What is the difference between $.map and $.grep in jQuery
  24. What is the use of serialize method in jQuery
  25. What is the use of clone method in jQuery?
  26. What is event.PreventDefault in jQuery?
  27. Difference between event.PreventDefault and event.stopPropagation?
  28. What are deferred and promise object in jQuery?
  29. What are source maps in jQuery?
  30. What does the jQuery migrate function do?
  31. Differences Between jQuery .bind() and .live()?
  32. How can you delay document.ready until a variable is set?
  33. How to disable cut,copy and paste in TextBox using jQuery?
  34. How to prevent Right Click option using jquery?
  35. How does the jQuery pushStack function work?
  36. Why use jQuery filter() Methods?
  37. Difference between find() and closest() in jquery?
  38. How To Use Ajax In Jquery?
  39. How to multiple AJAX requests be run simultaneously in jQuery?
  40. Can we call C# code behind using jQuery?
  41. How to include jQuery in ASP.Net project?
  42. Need to add jQuery file in both Master and Content page?
  43. Uncaught TypeError: $(…).modal is not a function jquery
  44. How to check whether a checkbox is checked in jQuery?
  45. Uncaught ReferenceError: $ is not defined
  46. How to Convert JSON Date to JavaScript/jQuery date