Smartlook script can be added to page without compromising content security in compliance to the Content-Security-Policy (CSP) directives. More on CSP, here.
For Smartlook to work with your CSP directive, two things are required:
- To add domains https://*.smartlook.com https://*.smartlook.cloud to script-src and connect-src directives.
- To add a nonce or a hash of the Smartlook inline script (you intend to use) to the script-src directive
Here’s a CSP example usage on a website, that is loading scripts only from its own domain and making requests to its own domain, with the addition of the Smartlook script:
Content-Security-Policy: default-src 'self'; script-src 'self' https://*.smartlook.com https://*.smartlook.cloud 'nonce-randomlyGeneratedBase64Nonce'; connect-src 'self' https://*.smartlook.com https://*.smartlook.cloud
And on page it would look something like this:
<script nonce=”randomlyGeneratedBase64Nonce”>...Your Smartlook Tracking Script...</script>
More information about nonce and script content hash can be found on Mozzila’s CSP: script-src web page.
One thing to note, we recommend you not to use ‘unsafe-inline’ in any directive as it makes CSP not secure and page becomes vulnerable to XSS and other forms of attacks.