This means every graphical object you create is also a DOM object, so you can attach JavaScript event handlers or modify them later. The width and height of the container are set to 100% so that the chart fills the whole screen. Because I’ve been using and producing my own OO/UML diagraming frameworks since ’92, and looking for one like the above for graphical design of a declarative specificacion-based test framework (now fed with textual notation in JSON), I’m looking into Google Blocky, and shall try to bend it for this purpose. https://www.syncfusion.com/javascript-ui-controls/diagram, You can find examples for each use cases here. These files have to be included inside the