I found a frustration in the act of making arrays of acceptable values to use in input validation for closed lists when I'd already defined the same when setting the types. Could I find a way to set up the array once and use for both needs?
So you need to make an image mask. That means making a shape and drawing the image into that shape so that the area of the image outside the shape is cut off. But you can't use a path so clipping is off the menu. How to get the mask with composition operations or fill pattern image...
One of the common requirements we see coming through the Konva Discord channel is modifying the stock Transformer anchors with popular requests being how to change the anchors shape and colors, and how use an icon for the rotation anchors. Lets take a look...
Shape rotation starts conceptually simple, but gets frustratingly hard quite quickly once you move away from very simple cases. This article discusses the basics and provides working code to rotate any shape around any arbitrary point on the stage. Handy stuff to have in your kit bag.
We can use a Kova.Transformer to put a temporary frame around grouped shapes, but what if we want the frame to persist? Here's a solution for that...
Ever needed to have a rect with alpha applied to the fill bit not the stroke - here's how.
Giving text a block color background with margin and padding is catered for well in CSS but not so easy in Konva where there is nothing as capable as CSS built-in. Here's some code to give you that feature.
Both the Konva Line and Path use a list of points to draw themselves. Someone asked about how to edit the points so I wrote this article and demo to explain...