[okular] [Bug 439663] New: [Feature Request] Necessity of performant and a good-rendering epub backend

[Chromer]

https://bugs.kde.org/show_bug.cgi?id=439663

            Bug ID: 439663
           Summary: [Feature Request] Necessity of performant and a
                    good-rendering epub backend
           Product: okular
           Version: unspecified
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: grave
          Priority: NOR
         Component: EPub backend
          Assignee: okular-devel at kde.org
          Reporter: downloader030 at gmail.com
  Target Milestone: ---

SUMMARY
Okular like usual document readers is not that good at rendering epub files,
currently Foliate is the best linux app in true and usable rendering of epub
files because of doing it with webkit and epub.js library.
Currently epub files with size of + 10 MB are impossible to load in okular, and
will make the app freeze and need to kill, very light and simple epubs also are
not easy and pleasant to read in okular.
As qt5-webengine is a mandatory dependency of Plasma , okular needs a epub
backend based on webengine and epub.js just like what foliate does in this way.

STEPS TO REPRODUCE
1. Open a epub in okular
2. You will never have a good experience when reading it on okular
3. Nothing will rendered properly and as it should be

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS 
Linux : Arch Linux
KDE Plasma Version: 5.22.3
KDE Frameworks Version: 5.83
Qt Version: 5.15.2 KDE 

ADDITIONAL INFORMATION

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