ConstReadonlylayer: "data-maidr-overlay"The overlay layer an adapter draws its highlight into.
Readonlyhighlight: "data-maidr-overlay-highlight"Each highlight box or outline inside the overlay layer.
ReadonlycleanCanvas: "data-maidr-clean-canvas"A hidden canvas inside the overlay layer holding the chart as it was before anything was painted over the data -- a tooltip -- for readers of the pixels to read in place of the visible one. It covers the overlay layer's box.
ReadonlypixelReader: "data-maidr-pixel-reader"Set on the overlay layer by a reader of the pixels -- the tactile display -- while it reads them. An adapter keeps its clean canvas only then, so a chart nobody reads that way is not copied on every frame.
ReadonlyplotArea: "data-maidr-plot-area"The plot area, as left top right bottom.
Readonlyexclude: "data-maidr-exclude"Areas the library has painted over the data, as left top right bottom
boxes separated by ;.
The attributes an overlay layer carries, by what each one marks.