[wp-trac] [WordPress Trac] #50997: Block Editor showing blank in WordPress 5.5

[WordPress Trac]

#50997: Block Editor showing blank in WordPress 5.5
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 Reporter:  david-woakes  |       Owner:  (none)
     Type:  defect (bug)  |      Status:  reopened
 Priority:  normal        |   Milestone:
Component:  Editor        |     Version:  5.5
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by jornfranke):

 Sorry, I meant of course Function (capital F) object. Examples:
 * https://github.com/WordPress/WordPress/blob/master/wp-
 includes/js/dist/data.js#L346
 * https://github.com/WordPress/WordPress/blob/master/wp-includes/js/dist
 /block-editor.js

 As you see it is the same as eval and thus bad.

 It is also in a couple of other places, but luckily not in as many as
 above.
 Unfortunately, the concept of having a Function object as parameter is in
 nearly all JS files mentioned above meaning it will be more work to update
 it. For example (there are more):
 * https://github.com/WordPress/WordPress/blob/master/wp-includes/js/dist
 /rich-text.js#L1061
 * https://github.com/WordPress/WordPress/blob/master/wp-includes/js/dist
 /format-library.js#L786
 * https://github.com/WordPress/WordPress/blob/master/wp-
 includes/js/dist/notices.js#L75
 * https://github.com/WordPress/WordPress/blob/master/wp-
 includes/js/dist/notices.js#L176

 However,  from a security point of view a must from my point of view.
 While the use itself it is insecure, also we cannot use CSPs to prevent
 that it is used by accident or on purpose in plugins that may then also
 introduce security problems.

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Ticket URL: <https://core.trac.wordpress.org/ticket/50997#comment:9>
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