[wp-trac] [WordPress Trac] #31793: Theme Switcher: Lazy load theme screenshots

[WordPress Trac]

#31793: Theme Switcher: Lazy load theme screenshots
--------------------------+-------------------------
 Reporter:  ocean90       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  high          |   Milestone:  4.2
Component:  Customize     |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  javascript
--------------------------+-------------------------
Changes (by westonruter):

 * keywords:  needs-patch => has-patch


Comment:

 I'm attaching here a patch I also attached on #28580, and as I
 [https://core.trac.wordpress.org/ticket/28580#comment:17 commented], in
 [attachment:31793.diff] the `ThemeControl`'s `renderContent` method gets
 deferred until the containing section is expanded, meaning that the
 screenshots won't load until the Theme Switcher panel is opened. Given the
 lateness of the release cycle, I think such a Theme Switcher-specific
 loading optimization should be what is in scope. /cc @mattwiebe

--
Ticket URL: <https://core.trac.wordpress.org/ticket/31793#comment:2>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform