I think this will do it ...
The CSS
<style>
.sticky {
position: fixed;
top: 0;
right: 20px;
left: 210px;
margin-top: 0;
}
</style>
And you'll need an event listener ...
document.addEventListener( 'scroll',
function(){
var h3s = document.getElementById('content').getElementsByTagName('h3')
for (var i=0;i<h3s.length; i++) {
var h3 = h3s[i]
// for perfectionists ... unsticky "fails" on page resize
if (h3.classList.contains('sticky')) {
var originalOffset = h3.getAttribute('data-original-offsettop')
if (window.pageYOffset<=originalOffset) {
h3.classList.remove("sticky");
}
} else if (window.pageYOffset > h3.offsetTop) {
h3.setAttribute('data-original-offsettop', h3.offsetTop)
h3.classList.add("sticky");
}
}
}
)
I ran the above on the existing changelog and it seemed to work OK.
-Tim
On Wed, Sep 9, 2020 at 9:25 AM Christopher Schultz
<ch...@christopherschultz.net> wrote:
>
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>
> All,
>
> Could someone better at CSS look into this for me?
>
> I sometimes find myself searching the changelog for some string e.g.
> "keystore". I generally do that by loading-up the changelog in my
> browser and using the browser's "Find" feature to search the text. (Duh)
> .
>
> The changelog for each version, however, usually stretches to a few
> screen-heights and it's often not possible to see the version number
> where a particular changelog item is included. I often have to find
> something, then scroll "up" to see the version number.
>
> This isn't a big deal when locating something specific: it generally
> occurs once (like a bug id) and then you go look at the version number
> and you are done.
>
> But when trying to find something that happened between versions X and
> Y, there is a great deal of scrolling, searching, re-scrolling,
> re-searching, etc. which may be avoided if the following is possible.
> (And I'm sure it is).
>
> What I'd like is for the <h3> headings on the changelog pages to
> "stick" to the top of the screen as they are scrolled. So, for
> example, if you load the changelog for Tomcat 9, you'll see at the
> very top of the page there is the standard Tomcat documentation header
> ("Tomcat", current version number, latest release-date), then the
> "Changelog" header, then the first <h3> which is currently "Tomcat
> 9.0.37 (markt)".
>
> As you scroll, the "Tomcat 9.0.37 (markt)" eventually scrolls up off
> the top of the visible page (as web pages generally do). Instead, when
> that heading gets to the top of the page, I'd like it to "stick" there
> until scrolling replaces it with the next <h3> in the order, which is
> currently "Tomcat 9.0.36 (markt)".
>
> This would keep the version number where fixes/improvements have been
> made at the top of the screen during any searching activity and make
> it much easier to hunt for certain kinds of fixes.
>
> Is anyone willing to look into implementing the above?
>
> - -chris
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