Rather than hard coding excludes into the dgeni config,
use the fact that we are already ignoring the boilerplate
and generated files via the .gitignore file.
Previously, the main content would always leave a 18% margin on the right to be
occupied by the ToC (even if there was no ToC).
This commit lets the main content expand to the right to occupy all the
available space when there is no ToC.
Fixes#17205Fixes#17270
Previously, when scrolling the ToC and reaching the top/bottom, further
mousewheel events would result in scrolling the window (and thus the main
content). This is standard browser behavior. In the case of the ToC though, the
`ScrollSpy` would detect scrolling in the main content and scroll the active ToC
to entry into view, thus resetting the scroll position of the ToC.
Reproduction:
1. Open `~/guide/template-syntax`.
2. Start scrolling through the long ToC.
3. Try to go to the bottom of the ToC.
4. Once you reach the bottom, the main content starts scrolling down.
5. The first section ("HTML in templates") becomes "active", so the ToC is
scrolled back up to make its corresponding entry visible.
6. Go back to step 2.
This commit improves the UX, by not allowing the main content to scroll when the
cursor is ovr the ToC and the user has scrolled all the way to the top/bottom of
it.
When navigating from a page with open SideNav to a page without closed SideNav,
the main content area animates from a non-zero left margin to zero left margin.
Additionally, the top-bar on the homepage is transparent, which allows the white
background behind the main content to be seen while the left margin is animated
to zero, making it appear as if something (e.g. the SideNav covers the top-bar).
This commit works around this issue, by not making the top-bar transparent
immediately when navigating to the homepage, but animating it from its blue
color to transparent with a delay.
Fixes#17248