When a page with ckeditor is restored from browser cache by using browser
history back feature application was trying to re-initialize it but this was
throwing some javascript errors that left ckeditor useless. The ckeditor user
interface seemed to be loaded correctly but editor contents was not shown
and ckeditor locked.
This solution is about destroying all ckeditor instances on page before
leaving it and force the reinitialization after Turbolinks restored the cache.
Inspiration here [1].
There is a similar patch to make it work with Turbolinks 5.x versions [2].
[1] https://github.com/galetahub/ckeditor/issues/575#issuecomment-132757961
[2] https://github.com/galetahub/ckeditor/issues/575#issuecomment-241185136
We're going to change CKEditor to an inline editor, and the "ckeditor"
gem doesn't provide an option to do so.
Since using `cktext_area` would automatically generate a "classic"
iframe CKEditor, we need to use `text_area` and load the editor using
JavaScript. Personally I prefer this option anyway.
Note in the jQuery selector we need to use `textarea.html-area`; using
just `.html-area` would fail if there's an error message associated to
the textarea, since Rails will add the `.html-area` class to the error
message.
