When comparing Electron vs IUP, the Slant community recommends IUP for most people. In the question“What are the best cross-platform GUI toolkits?” IUP is ranked 14th while Electron is ranked 23rd.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Healthy community
Github is behind electron and there is a lot of big companies using it to make their cross platform apps.
Pro Active development
Electron receives updates frequently (multiple times each month). For example, the recent updates (as of July 15, 2016) are:
1.2.6 (released July 6)
1.2.5 (released June 23)
1.2.4 (released June 22)
1.2.3 (released June 16)
1.2.2 (released June 8)
Pro learning curve is less
Electron has less learning curve when compare to qt like other options
Pro Great documentation
Electron has a nice website with great documentation. It also features a lot of samples.
Pro Solid API
Pro Lightweight library and simple C interface
Pro Native controls on each supported OS
Pro Just UI
Easier to mix with other libraries since it doesn't try to control all that.
Pro Free/gratis
Pro MIT license
Pro Supports embedded OpenGL
Cons
Con Apps can have memory issues
Apps made with Electron are likely to have memory issues unless you specifically design the app with efficient coding.
Con High CPU Usage
Electron Has High CPU Usage
Con Needs to run chromium
Runs chromium in the background which consumes a lot of resources.