TOC scroll chasing failed on the homepage if 'disqus' is set.

[jfcherng]

Description

My disqus is set in the yaml config like

extra:
  disqus: 'my_disqus_id'

The homepage is hard-coded to not show the Disqus forum.

mkdocs-material/src/base.html

Lines 298 to 301 in 0d78871

	{% if (config.extra.disqus and not page.is_homepage) or
	(page and page.meta and page.meta.disqus) %}
	{% include "partials/integrations/disqus.html" %}
	{% endif %}

However, in the homepage, if disqus is set, there would be a Comment section in TOC.

After scrolling down and up in the homepage, my Chrome console shows

application.8eb9be28.js:1 Uncaught TypeError: Cannot read property 'offsetTop' of undefined
    at e.update (application.8eb9be28.js:1)
    at update_ (application.8eb9be28.js:1)

and then the TOC scroll chasing failed.

Expected behavior

The Comment section should not be shown in homepage's TOC.

Actual behavior

It shows.

Steps to reproduce the bug

1. Set any disqus id in the yaml config
2. Build the site

Package versions

• Python: Python 3.6.4
• MkDocs: mkdocs, version 0.17.2
• Material: Version: 2.7.0

[squidfunk]

Thanks, that's indeed a bug.

[squidfunk]

Fixed in 6ecf71e

[squidfunk]

Fix released as part of 2.7.1