Fabric.js canvas instance
OptionalcolorsCustom colors
OptionalinitialInitial color
OptionalinitialInitial tool
OptionalinitialInitial stroke width
OptionalonCalled when an object is added
OptionalonCalled when an object is modified
OptionalonCalled when selection changes
OptionalreadWhether the canvas is read-only
OptionalstylesCustom styles
User ID for object ID generation
Options for the useWhiteboardTools hook