In hook_page_attachments(), the Matomo module is using a javascript snippet to force the insertion of the matomo.js script at the top of head. This is making it difficult for other modules to ensure that their script appears before it. This is needed in the case of cookie compliance banner scripts which need to run before other scripts like matomo.
Rather than including javascript to create a script element and insert it into the head, the module should instead use hook_page_attachments() to add the external js file and set #weight to -100 or similar to ensure it is loaded early on. Other modules, like cookie compliance ones or custom ones, can either set their own script weight to be lower again, or use hook_page_attachments_alter() to modify the matomo one if needed for their site.
The attached patch does this. It removes the js which does the manual insertion and adds two page attachments - one for the external js file, and one for the _paq.push() calls to come after it.
Needs work
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Fixed the $script_src variable initialization by adding needed parentheses.
Moved patch into an MR. But also attached.
I have tested #11 for an existing installation with previous patch #12
the scripts seems to load and work properly
I can confirm that #11 patch is working properly.