Append one or more elements to the end of the canvas Element frame/center/coordinates values are y-down (y = 0 at the top of the canvas) -- a different sense from the canvas window's own x/y position, which is unflipped AppKit screen coordinates. See hs.canvas's module-level docs for the full explanation.

Replace the element at an index, or append if the index equals the current element count

Set the window's Spaces/Exposé collection behavior to a single named behavior

Set the window's Spaces/Exposé collection behavior to a combination of named behaviors

Set the window's Spaces/Exposé collection behavior to a raw bitmask

All elements currently on the canvas

Enable whole-canvas mouse tracking for regions not covered by any individually tracked element. Delivered through mouseCallback() with id "_canvas".

Remove the whole-canvas transformation set by setTransformation()

Set whether clicking the canvas activates the Hammerspoon app

Destroy the canvas window and release its resources Named destroy() rather than v1's delete() -- delete cannot be used as a JavaScriptCore-exported method name in this codebase's bridging layer.

Set a callback fired when files or text are dropped onto the canvas

Create an independent copy of this canvas, with the same frame, elements, and window configuration Named duplicate() rather than v1's copy() -- this codebase's conventions forbid method names starting with copy (an ARC/ObjC hazard), the same rule that renamed new() to create().

Get a single attribute value from an element Returns Any? (mirroring hs.userdefaults.get()) rather than a concrete Swift type because an element attribute's value is genuinely heterogeneous -- a string, number, boolean, nested object, or array, matching v1's dynamically-typed Lua table values.

The smallest rectangle enclosing an element's rendered shape

The number of elements on the canvas

The attribute keys present on an element

The canvas window's current position and size

Hide the canvas window (keeps it in memory; elements and window config are preserved)

Set whether the canvas window ignores all mouse events, passing clicks through to whatever is behind it This is a capability beyond v1's hs.canvas API surface (not a literal v1 method name) -- v1 has no direct equivalent for full click pass-through.

Render the canvas's current contents to an image

Insert an element at a specific index

Whether the canvas is hidden behind other windows, or off-screen entirely

Whether the canvas window is currently ordered onto the screen

Whether the canvas is showing AND at least partially visible (not fully occluded or off-screen)

Set the window level by name

Set the window level to a raw numeric value Split out from level(_:) (rather than accepting a string-or-number union) because JSExport parameters must have a single concrete type -- see hs.canvas.windowLevels, which exposes raw numeric values (not opaque name strings) so scripts can do arithmetic on them, matching v1 behavior.

Set the callback fired for tracked mouse events Fires for elements with trackMouseDown/trackMouseUp/trackMouseEnterExit/ trackMouseMove set to true in their element dictionary, and for whole-canvas regions enabled via canvasMouseEvents() (delivered with id "_canvas").

Remove the element at a specific index

Remove a single attribute from an element

Remove the last element

Replace all elements on the canvas

Rotate an element about its own bounding-box center

Rotate an element about a specific point

Set the accessibility subrole reported for this canvas's window

Set a single attribute value on an element

Apply a raw 2D affine transformation matrix to a single element

Move and/or resize the canvas window

Resize the canvas window without moving its top-left corner

Move the canvas window without changing its size

Apply a raw 2D affine transformation matrix to the whole canvas

Show the canvas window

The canvas window's current size

The canvas window's current top-left corner the point at the window's highest y (its screen-visual top), not y = 0.