How to Embed Bootstrap 3 CDN with maxcdn or cdnjs cloudflare

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Bootstrap 3 CDN

  • If you are a web developer and coding your website on bootstrap framework, then it is really a great idea to use the CDN link for the bootstrap files. We use bootstrap because it is lightweight and customizable. Bootstrap is compatible with almost all major browsers and it is mobile-first responsive framework.
  • If you don’t want to download the local copy of Bootstrap files and host in your server, you have one more option. You can embed Bootstrap 3 from a CDN (Content Delivery Network).
  • Or in other words, the bootstrap 3 files are already hosted by many online servers and you can simply embed by using the URL in the link HTML tag or script HTML tag.

What is CDN (Content Delivery Network)

CDN is known as Content Delivery Network, means you can host files on the public domain servers and share the files.

CDN services have many servers (Cloud Service) in different geographic locations, and hence the delivery of files from CDN is lighting fast as compared to your own server.

A CDN is a network of computers that delivers content. More specifically, it’s a bunch of servers geographically positioned to deliver content as per the location of the user. The delivery of content becomes faster by reducing latency.

Advantages of Embed Bootstrap 3 with CDN

The reason for using a CDN is to improve the user’s experience on your website.

One advantage of using the Bootstrap CDN is that many times users browsers need not download the bootstrap files because the files already have been downloaded from CDN when visiting other sites.

Note: Browser identify the files from its URL, and if URL is same the browser will not download same file multiple times.

As a result, if the browser has downloaded the same file previously, the performance of your web site becomes fast ( save the time to download the bootstrap files ).

Also, most CDN’s will make sure that the file request from it will be served from the server closest to the visitor, which also leads to faster loading time.

There are several reasons why a CDN could benefit your website

1. Limitation of Concurrent download of multiple files from the same domain or website

Browsers limit the number of concurrent connections (file downloads) to a single domain. Most permit four active connections at a time, so the download is blocked until one of the previous files has been fully retrieved.

2. Files may be pre-cached

There is a high probability that someone visiting your pages has already visited a site using the CDN. Therefore, the file has already been cached by your browser and won’t need to be downloaded again.

3. High-capacity CDN infrastructures

You may have great hosting but I bet it doesn’t have the capacity or scalability offered by CDN servers.

4. Distributed data centers

If your main web server is based in Dallas, users from Europe or Asia must make a number of trans-continental electronic hops when they access your files. Many CDNs provide localized data centers which are closer to the user and result in faster downloads.

5. Built-in version control

It’s usually possible to link to a specific version of a CSS file or JavaScript library. You can often request the “latest” version if required.

And finally we can say that the end users experience have less jitter and improved stream quality. CDN users can deliver high definition content with high Quality of Service at low costs.

CDN Options for Bootstrap 3

In order to minimize the load on the primary server, we use a CDN link of the bootstrap CSS and js files.

Because Bootstrap is one of the very popular front-end framework, there are many CDN services are providing the links to Bootstrap files.

And, all the listed CDN links have SSL or https enabled, means secured.

Here are some of the fastest Bootstrap 3 CDN links

  1. Microsoft Ajax CDN Link
  2. Cloudflare Link
  3. Stackpath Link
  4. MaxCDN Link

MaxCDN Bootstrap 3 Links

MaxCDN provides CDN support for Bootstrap’s CSS and JavaScript. You have to include jQuery library also.

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>

<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script> 
				 

Note: Bootstrap JS uses jQuery Library for JavaScript plugins. However, if you just use the CSS part of Bootstrap, jQuery is not necessary.

More secure way of embedding CDN links in HTML

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
				 

What is “integrity” of SRI in the link and script syntax

The third-party-hosted resources such as scripts and stylesheets are vulnerable to manipulation. An attacker with access to the CDN can manipulate or replace a file – or trick the user into downloading content from a compromised server.

Subresource Integrity (SRI) is a security feature that instructs browsers to verify that resources fetched from third parties like CDNs have been delivered without any manipulation. SRI does this by comparing the hash values of the third-party-hosted resources to the values in the website’s HTML elements.

Microsoft Ajax Bootstrap 3 CDN Link

CSS and JS Minified Link

https://ajax.aspnetcdn.com/ajax/bootstrap/3.4.0/bootstrap.js
https://ajax.aspnetcdn.com/ajax/bootstrap/3.4.0/css/bootstrap.css

CSS and JS Non Minified Version

https://ajax.aspnetcdn.com/ajax/bootstrap/3.4.0/css/bootstrap.min.css
https://ajax.aspnetcdn.com/ajax/bootstrap/3.4.0/bootstrap.min.js

Link:For more options with Microsoft CDN click here.

The fastest Bootstrap CDN link is provided by Microsoft Ajax (a premium CDN network) according to test results. I would highly recommend you to go with Microsoft CDN links because the performance has been stable in major locations worldwide.

Cloudflare Bootstrap 3 cdn link

CSS Minified Link

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
		 

Link:To know more about other options on cdnjs click here.

Stackpath Links for Bootstrap 3

<link href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd" crossorigin="anonymous"></script>
		 

Link:To know more about bootstrapcdn click here.

Bootstrap 3 Ready Blank HTML Template with CDN

In this example we provide HTML template with CDN links for jQuery and Bootstrap.

Example – Bootstrap 3 CDN Enabled HTML 5 Code Template

<!DOCTYPE html>
<html lang="en">
<head>

    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap Tutorial for Beginners</title>

    <!-- Compiled and minified CSS -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

</head>
<body>

<!-- container -->
<h1>Welcome to ElexTutorial.com</h1>
<h1 class="text-center">Welcome to ElexTutorial.com</h1>
<!-- Latest compiled and minified JavaScript -->

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<!-- Compiled and minified Bootstrap JS -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
 
</body>
</html>
	

In the above code example we have embedded both CSS and jQuery file of Bootstrap 3 in the HTML 5 basic page structure. In this example we have used MAX CDN Bootstrap files.

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