[wp-trac] [WordPress Trac] #29979: Twenty Fifteen: Long sidebar produces double-scrollbars

[WordPress Trac]

#29979: Twenty Fifteen: Long sidebar produces double-scrollbars
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 Reporter:  kraftbj                  |       Owner:
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  4.1
Component:  Bundled Theme            |     Version:  trunk
 Severity:  blocker                  |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:  ui, javascript
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Comment (by iandstewart):

 29979.5.diff feels most natural to me even though 29979.6.diff is pretty
 cool. It best mimics what I imagine to be expected behaviour when one
 scrolls.

 Can we tackle these issues that @iamtakashi has highlighted with this
 approach?

 * When we have a shorter sidebar, there is an inline style position: fixed
 for .sidebar, but that's causing an issue when a screen is resized to <
 955px.
 * On Safari (Mac), when we have a longer sidebar, after scrolling up a few
 times, the top part of the sidebar gets hidden.
 https://cloudup.com/cChe93pk860
 * The biggest issue I see is that on iPad landscape orientation. I wish we
 can just simply disable this fix but we don't have a reliable way to
 detect touch device for front-end, do we?

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Ticket URL: <https://core.trac.wordpress.org/ticket/29979#comment:31>
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