Instant navigation breaks third-party URLs

• I’ve read the [contribution guidelines][1] and agree with them

I’ve found a bug and checked that …

• … the problem doesn’t occur with the default MkDocs template
• … the problem is not in any of my customizations (CSS, JS, template)
• … the documentation does not mention anything about my problem
• … there are no open or closed issues that are related to my problem

Description

Enabling navigation.instant modified Isso requests URLs on first load. A page reload restores them.

Expected behavior

Requests are sent to usual URLs

Actual behavior

Requests are sent to a non existent URL

Steps to reproduce the bug

My website has https://example.org/mkdocs/ set as site_url and loads on every page the following Isso code:

{% block disqus %}
 {% if not page.is_homepage %}
  <script data-isso="https://example.org/comments" src="https://example.org/comments/js/embed.dev.js"></script>
  <section id="isso-thread"></section>
 {% endif %}
{% endblock %}

The file embed.dev.js is the minified version of this attached file: embed.dev.js.txt. It generates URLs from the “data-isso” attribute.

Without navigation.instant, comments are properly loaded:

• First load

Code	Method	URL
200	GET	https://example.org/mkdocs/PAGE
200	GET	https://example.org/comments/js/embed.dev.js
200	POST	https://example.org/comments/count
200	GET	https://example.org/comments/?uri=PAGE&nested_limit=5

• Page Reload

Code	Method	URL
200	GET	https://example.org/mkdocs/PAGE
200	GET	https://example.org/comments/js/embed.dev.js
200	POST	https://example.org/comments/count
200	GET	https://example.org/comments/?uri=PAGE&nested_limit=5

I noticed that by enabling navigation.instant the request URLs appear modified (XHR interceptor?), but only at the first load of the page.

A user has has in fact to press F5 everytime he changes page, otherwise he will see the comment section, but he won’t be able to create or load comments.

• First load

Code	Method	URL
200	GET	https://example.org/mkdocs/PAGE
200	GET	https://example.org/comments/js/embed.dev.js
404	POST	https://example.org/assets/javascripts/bundle/count
404	GET	https://example.org/assets/javascripts/bundle/?uri=PAGE&nested_limit=5

• Page reload

Code	Method	URL
200	GET	https://example.org/mkdocs/PAGE
200	GET	https://example.org/comments/js/embed.dev.js
200	POST	https://example.org/comments/count
200	GET	https://example.org/comments/?uri=PAGE&nested_limit=5

I have tried with clean MkDocs directories multiple times and the problem always (and only) appears when enabling instant navigation.

Package versions

• Python: 3.9
• MkDocs: 1.1.2
• Material: 7.0.0

System information

• OS: any
• Browser: any

[squidfunk]

b6779114 now preserves all attributes of the script tag. This might fix the issue.

[AlphaJack]

Before we proceed, it’s necessary to provide a reproducible example.

Here’s the same zip I mailed you, also in case @polarathene would like to give it a try: material-isso.zip

Please go back and forth between “home” and “test”, so you can see the actual behaviour. By reloading a page you will see that the error is gone. The file javascript file of the “src” attribute is always loaded properly, the URLs that are modified are the ones generated by that file.

• First load:

• Page reload: