Ui

ui

touch

https://www.html5rocks.com/en/mobile/touchandmouse/

http://tutorials.jenkov.com/responsive-mobile-friendly-web-design/touch-events-in-javascript.html

svg

http://apex.infogridpacific.com/SVG/svg-tutorial-lesson17-path-arcs.html

https://codepen.io/jakob-e/pen/bgBegJ

http://localhost/spas/ui/arc.html

https://css-tricks.com/svg-path-syntax-illustrated-guide/

https://css-tricks.com/svg-line-animation-works/

https://codepen.io/chriscoyier/pen/bGyoz

knobs

http://denilson.sa.nom.br/html5-knob/ https://github.com/denilsonsa/html5-knob 2 years ago

http://www.russellmcc.com/knobjs/ https://github.com/russellmcc/knobjs 4 years ago

http://www.ohsean.net/plugins/jogdial/ https://github.com/ohsiwon/JogDial.js 6 months ago

https://www.cssscript.com/demo/touch-enabled-knob-control-pure-javascript-jim-knopf/ https://github.com/eskimoblood/jim-knopf 2 years ago

https://radmie.github.io/ng-knob/ https://github.com/RadMie/ng-knob a year ago angular

http://quasar-framework.org/quasar-play/android/index.html#/showcase/forms/knob https://github.com/quasarframework/quasar 4days ago a vue framework