[wp-trac] [WordPress Trac] #36613: Browser back button doesn't work in Theme Browser

[WordPress Trac]

#36613: Browser back button doesn't work in Theme Browser
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 Reporter:  dd32                       |       Owner:  adamsilverstein
     Type:  defect (bug)               |      Status:  reopened
 Priority:  normal                     |   Milestone:  4.8
Component:  Themes                     |     Version:
 Severity:  normal                     |  Resolution:
 Keywords:  needs-testing needs-patch  |     Focuses:  javascript
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Changes (by afercia):

 * keywords:  has-patch needs-testing => needs-testing needs-patch
 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 Noticed a JS error while navigating through themes, sorry for reopening 😬
 To reproduce:
 - Add Themes screen > click on a theme, let's say the first one
 - the theme installer opens
 - navigate a couple themes forward
 - then use your browser's back button to navigate backwards
 - after the third click, the theme installer correctly closes
 - now click on another theme in the same screen, let's say the second one
 - the theme installer opens
 - click on the theme installer next or previous arrows
 - no navigation happens
 Here's what I get in the console:

 {{{
 Uncaught TypeError: Cannot read property 'at' of undefined
 theme.js?ver=4.8-alpha-39357-src:526
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/36613#comment:8>
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