Logic,Circuit (@webwriter/logic-circuit@1.2.0)

License: MIT | Version: 1.2.0

Create and simulate circuits with logic gates (AND, OR, XOR, etc.).

Snippets

Snippets are examples and templates using the package's widgets.

Name	Import Path
Halfadder	@webwriter/logic-circuit/snippets/halfadder.html
RS FlipFlop	@webwriter/logic-circuit/snippets/RS-FlipFlop.html

LogicCircuit (<webwriter-logic-circuit>)

Usage

Use with a CDN (e.g. jsdelivr):

<link href="https://cdn.jsdelivr.net/npm/@webwriter/logic-circuit/widgets/webwriter-logic-circuit.css" rel="stylesheet">
<script type="module" src="https://cdn.jsdelivr.net/npm/@webwriter/logic-circuit/widgets/webwriter-logic-circuit.js"></script>
<webwriter-logic-circuit></webwriter-logic-circuit>

Or use with a bundler (e.g. Vite):

npm install @webwriter/logic-circuit

<link href="@webwriter/logic-circuit/widgets/webwriter-logic-circuit.css" rel="stylesheet">
<script type="module" src="@webwriter/logic-circuit/widgets/webwriter-logic-circuit.js"></script>
<webwriter-logic-circuit></webwriter-logic-circuit>

Fields

Name (Attribute Name)	Type	Description	Default	Reflects
LogicCircuit.shadowRootOptions	object	-	{ ...LitElementWw.shadowRootOptions, delegatesFocus: true, }	✗
localize	-	i18n handler for the widget.	LOCALIZE	✗
LogicCircuit.scopedElements	-	Registers scoped custom elements used within the logic circuit widget.	-	✗
lineElements (lineElements)	array	The list of all current wire (line) elements.	[]	✗
gateElements (gateElements)	array	The list of all current gate elements.	[]	✗
reflectGates (reflectGates)	String	Stringified representation of gate state, synced via attribute.	""	✓
reflectCons (reflectCons)	String	Stringified representation of connector state, synced via attribute.	""	✓
gateID (gateID)	number	Internal gate ID counter for uniquely identifying gates.	0	✗
lineID (lineID)	number	Internal line ID counter for uniquely identifying wires.	0	✗
zoom (zoom)	number	Current zoom level of the circuit canvas.	1	✗
dragStartX (dragStartX)	number	X coordinate where the drag operation started.	0	✗
dragStartY (dragStartY)	number	Y coordinate where the drag operation started.	0	✗
simulate (simulate)	boolean	Whether the simulation is running.	true	✗
simulationDelay (simulationDelay)	number	Delay in milliseconds between simulation steps.	500	✓
allowSimulation (allowSimulation)	number	Whether simulation is allowed (1 = allowed, 0 = disallowed).	1	✓
notGateAllowed (notGateAllowed)	number	Limit or enable state for NOT gates (-1 = unlimited, 0+ = limited).	-1	✓
andGateAllowed (andGateAllowed)	number	Limit or enable state for AND gates.	-1	✓
orGateAllowed (orGateAllowed)	number	Limit or enable state for OR gates.	-1	✓
nandGateAllowed (nandGateAllowed)	number	Limit or enable state for NAND gates.	-1	✓
norGateAllowed (norGateAllowed)	number	Limit or enable state for NOR gates.	-1	✓
xnorGateAllowed (xnorGateAllowed)	number	Limit or enable state for XNOR gates.	-1	✓
xorGateAllowed (xorGateAllowed)	number	Limit or enable state for XOR gates.	-1	✓
splitterAllowed (splitterAllowed)	number	Limit or enable state for splitter gates.	-1	✓
isDragging (isDragging)	boolean	Whether the user is currently dragging the canvas or an element.	false	✗
isDrawingLine	boolean	Whether a connection line is currently being drawn.	false	✗
startConnector	ConnectorElement	Reference to the starting connector for a wire being drawn.	null	✗
endConnector	ConnectorElement	Reference to the ending connector for a wire being drawn.	null	✗
svgCanvas	-	Reference to the SVG canvas element.	-	✗
workspaceContainer	-	Reference to the overall workspace container.	-	✗
wsDrag	-	Reference to the draggable inner workspace.	-	✗
simCheckbox	-	Reference to the simulation checkbox toggle.	-	✗
instructionsContainer	-	Reference to the instructions container.	-	✗
getGateElements	-	Get the current list of gate elements.	-	✗
getLineElements	-	Get the current list of line elements.	-	✗
svgPathToMouse	SVGPathElement | null	The temporary path element used when drawing a wire to follow the mouse.	null	✗

Fields including properties and attributes define the current state of the widget and offer customization options.

Methods

Name	Description	Parameters
toggleInstructions	Toggles the visibility of the instructions container in the UI.	-
handleAllowSimulation	Toggles simulation mode on or off. Resets the circuit and updates the simulation checkbox and internal flag.	-
handleFlipAllGates	Enables or disables the "truth table" display on all gates, depending on the state of the main switch.	-
handleMouseDown	Handles mouse down interactions on the workspace. - Starts dragging the canvas if the background is clicked. - Cancels in-progress line drawing. - Hides any open gate context menus.	event: MouseEvent
handleMouseMove	Handles mouse move events during dragging or line drawing. Updates canvas position or live line path accordingly.	event: MouseEvent
transformWorkspace	Applies the current workspace offset and zoom transform to the container.	-
handleMouseUp	Stops dragging behavior.	-
handleWheel	Handles zooming the workspace with the mouse wheel. Clamps zoom between 0.5 and 2.5, and recalculates boundaries.	event: WheelEvent
handleDragLeave	Handles mouse leaving the workspace area while dragging. Updates line positions to initial position.	event: MouseEvent
handleContextMenu	Prevents the default browser context menu.	event: MouseEvent
handleDragOver	Called when a gate is dragged over the workspace. - Moves any connected lines dynamically. - Highlights the trash can icon if hovering over it.	event: DragEvent
handleDrop	Handles a drop event on the workspace. - Adds new gates or moves existing ones. - Deletes gates if dropped over the trash icon.	event: DragEvent
handleDropTrashCan	Deletes a gate when it is dropped over the trash can.	event: DragEvent
handleInputChange	Parses a numeric input field and sets the corresponding property. Defaults to -1 if the value is invalid.	event: InputEvent, propertyName: string
simulateCircuit	Starts circuit simulation. Calculates outputs from all input gates and propagates through the circuit. Stops simulation if the checkbox is unchecked.	-
resetCircuit	Resets all gates and lines in the circuit to their initial state.	-
calculateBoundaries	Ensures the workspace stays within bounds during dragging or zooming. Clamps workspaceOffsetX and workspaceOffsetY based on viewport and canvas size.	-

Methods allow programmatic access to the widget.

Slots

Name	Description	Content Type
(default)	The default slot (currently unused in this widget)	-

Slots define how the content of the widget is rendered.

Custom CSS properties

Name	Description
--circuit-background	Background color of the workspace

Custom CSS properties offer defined customization of the widget's style.

CSS parts

Name	Description
gate	Styles individual gate components
line	Styles the connecting lines between gates

CSS parts allow freely styling internals of the widget with CSS.

Editing config

Name	Value

The editing config defines how explorable authoring tools such as WebWriter treat the widget.

No public events.

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Generated with @webwriter/build@1.8.1