How to Securely Include External CSS and JS Files via HTTPS?

Secure Inclusion of External CSS and JS Files via HTTPS

When incorporating external CSS and JS files into your website, it's important to ensure that they're served securely when the parent page is accessed via HTTPS. Browsers often display warnings if unsecured content is loaded onto HTTPS pages.

To resolve this issue, utilize protocol-relative paths. Instead of specifying the full URL, including the protocol (e.g., http), use double forward slashes (//).

Example:

Instead of:

<link rel="stylesheet" href="http://example.com/style.css">
<script src="http://example.com/script.js"></script>

Use:

<link rel="stylesheet" href="//example.com/style.css">
<script src="//example.com/script.js"></script>

By using protocol-relative paths, the browser will automatically fetch the external content using the same protocol as the parent page. This ensures that all content is loaded securely when the page is accessed via HTTPS.

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