Used to using CSS selectors to work on the HTML DOM and wondering if there is anything similar in Konva? Here’s your answer!
Author Archives: VanquishedWombat
Konva – a better zoom-at-a-point demo
The official Konva demo for “Zoom relative to a pointer” applies the zoom via a constant factor – I have an alternative suggestion.
Konva – drawing a grid over the stage
Putting a grid over a Konva diagram is a common use case so I thought I would explore some of the options and explain a little about what goes on when zooming the Stage.
HTML5 canvas synchronisation with Konva, part 2, peer-to-peer
In part 2 of my hacking a way to synchronise HTML5 canvases across browser windows, I’m taking the results from part 1 and making them work between browser windows via communications lib PeerJS.
HTML5 canvas synchronisation with Konva, part 1
Interactive whiteboard apps seem to be a popular use-case vector for the HTML5 canvas. I’m a fan of the Konva JavaScript 2d canvas library so I wondered what it would take to synchronise canvases. Design thoughts My end goal is a meeting or classroom-style whiteboard where there could be multiple users sharing and co-operating onContinue reading “HTML5 canvas synchronisation with Konva, part 1”
Support me not
A few thoughts for folks who might be new to the support role. Acknowledge early, be straight & factual, and sign your work.
The trouble with npm-install…
Boss to developer at 5pm Friday: “That proof-of-concept you knocked up last week for the sales team web dashboard ? We’ve promised the full-blown version to the users by next week – you’re good with that, right?”
Konva – Zooming the stage under the mouse
When you start zooming with Konva you pretty quickly get frustrated about how to zoom relative to the mouse position and not the top-left corner of the stage. Here’s how to do that.
Konva Group – useful but spooky
The Konva group is a bit hard to pin-down, almost a normal shape but not quite. Its super-powers can be a bit challenging though once you understand a few fundamentals its got your back. Lets dive in…
Konva – Capture canvas animation to GIF in the browser
I’ve seen a number of questions regarding how to save an HTML5 canvas animation as an animated GIF. So, lets have at it…
Coding for the long view 