Make a diagram creation tool in React #3: Component design of the tool
У вашего броузера проблема в совместимости с HTML5
TLDW: We have a graphics component used to display the diagram, and the diagram is being rendered by creating new Konva shapes from the attributes stored in the state. We also have a toolbar and a righttoolbar, when we drop shapes from the toolbar, it is pushing a new shape to the end of state array.