GitHub - bobboteck/JoyStick: A simple JoyStick that use HTML5, Canvas and Vanilla JavaScript, for touch and mouse interfaces (no JQuery required), preview at:
html5-canvas-drawing-app/index_jQueryMobile.html at master · krisrak/html5- canvas-drawing-app · GitHub
![javascript - how to draw control on canvas using mobile touch while having scroll on screen - Stack Overflow javascript - how to draw control on canvas using mobile touch while having scroll on screen - Stack Overflow](https://i.stack.imgur.com/RXypG.png)