- feature-complete. Once again, there's a reason all UI projects for this "most feature-complete framework" keep reinventing the most primitive controls. Because the web has none, and creating complex controls is a near-impossibility. Also, if it was feature complete, https://open-ui.org/ wouldn't exist.
If you are actually looking for a flexible feature-complete GUI framework, then it's Qt.
I've just finished a very simple and easy to use library that allows you to get as man̸͖̓ÿ̸̹́ ̸̬̆m̸̝̆ụ̵͛t̵̩͠a̴̘͒b̵̢̒l̸͚̄ë̵̹́ ̷̼͑r̶̨̽ḙ̷̊f̵̼̎e̴̩̾r̵̡͘e̷͚͠ǹ̵̞ces as you need and solves all your so̷r̴r̷o̸w̶ ̷c̶h̴e̴c̶k̴e̴r̸ and thread/resource sharing p̴̙̲͐̂r̸̹̟͂̎ỏ̶̞̙̑b̵̟͐̄ḹ̵̤͠ę̴̭̓̂m̸̩͖̀̑s̷͙̆!
We've recently undergone transition from an invalid combination of LGPL + custom clauses to dual-licensing under AGPL and proprietary. I actually forgot to replace the license mention in this buildscript, thank you!
Saves them a lot of pain in the ass.