How do I fix: Root Causes of the Error?

Blockages or disruptions in the CDN networkCross-site scripting (XSS) attacks or malware that block CDN access

How do I fix: How to Resolve This IssueMethod 1: Local Script Fallback?

Step 1: Create a local copy of the required script files in your application’s root directory or a designated scripts folder.

How do I fix: Method 2: Using HTML Script Tags with Fallback?

Step 1: Use the `src` attribute of the `` tag to point to your local script files, and include a fallback URL using the `fallBack` attribute. For example:

Coding⏱️ 2 min read📅 2026-06-03

How to Fix: How to load local script files as fallback in cases where CDN are blocked/unavailable?

Load local script files as fallback for CDN blockage

Quick Answer: Use a script tag with a src attribute set to the local file path, and a fallback src attribute set to the CDN URL. This way, when the CDN is blocked, the browser will load the local file instead.

📋 Table of Contents

Root Causes of the Error
How to Resolve This Issue
✨ Wrapping Up

When using a Content Delivery Network (CDN) for loading script files, there are times when the CDN is blocked or unavailable. In such cases, having a local fallback can significantly improve user experience and ensure that your application remains functional.

Root Causes of the Error

Blockages or disruptions in the CDN network
Cross-site scripting (XSS) attacks or malware that block CDN access

How to Resolve This Issue

Method 1: Local Script Fallback

Step 1: Create a local copy of the required script files in your application’s root directory or a designated scripts folder.

Method 2: Using HTML Script Tags with Fallback

Step 1: Use the `src` attribute of the `</pre>
```
<script src="local/jquery-ui.min.js" fallBack="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.10/jquery-ui.min.js">
```

✨ Wrapping Up

By implementing a local script fallback, you can ensure that your application remains accessible and functional even when the CDN is down. This approach also reduces dependence on external resources, enhancing overall resilience.

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