100%

mouse follower

✓ Published0🌍 Public

Last edited Apr 9, 2024

Created on Apr 9, 2024

This example shows a single green circle that follows the mouse pointer across an SVG canvas. Moving the mouse updates the circle’s position via `d3.pointer` and state management, while clicking changes its fill color to a random hex value. The code uses D3 v7, with `select`, `pointer`, and data joins to bind the circle’s coordinates and radius. The visualization demonstrates reactive updates through a `setState` callback, with the circle rendered at half opacity.

AI-generated description

Creating circles with D3.

Challenge

Fork this example
Modify it
Maybe make it Halloween themed
Maybe make it Christmas themed
Be creative

MIT Licensed

Similar vizzes

Loading thumbnail…

Mouse Follower

This example demonstrates a red, green, or blue circle that tracks the mouse pointer across an SVG canvas, changing to a random hex color on each click. It uses D3’s `select` and `pointer` methods to capture mouse coordinates and update state through immutable update patterns, spreading the previous state object and overwriting the `x`, `y`, and `color` properties. The circle’s position and fill are bound directly to the current state values via D3 joins.

Mmelissastrong89@gmail.com

93% match

Loading thumbnail…

Mouse Follower

This example shows a single circle that follows the mouse pointer across an SVG canvas, with its fill color changing to a random hex value on each click. The circle’s position and color are derived from the current mouse coordinates (via the `pointer` API) and a color string stored in the state. The visualization uses D3’s `select`, `join`, and method-chaining pattern to bind the SVG element and circle, updating them through the `setState` callback on `mousemove` and `click` events.

Iismail.otman1995@gmail.com

93% match

Loading thumbnail…

Mouse Follower

This example demonstrates a mouse-following circle that changes position with cursor movement and shifts to a random color on click. The visualization starts with a blue circle centered in the viewport, then uses d3’s `select`, `pointer`, and `join` methods to render an SVG and update its attributes. State changes follow immutable update patterns, spreading the previous state and overriding specific properties like `x`, `y`, and `color`. The code also relies on container dimensions and event listeners for `mousemove` and `click` interactions.

CCurran Kelleher

91% match

Loading thumbnail…

Mouse Follower

This example demonstrates a single semi-transparent circle that follows the mouse cursor across a light green background, changing color randomly with each click. The visualization uses D3’s `mousemove` event and `d3.pointer` to update the circle’s position, while a `click` event triggers a random hex color assignment. The circle’s coordinates and fill are stored in a state object, and D3’s data join (`selectAll`/`join`) binds this state to the SVG circle element. The rendering approach relies on direct SVG manipulation via D3, with no external data source—purely interactive and state-driven.

SSubhendu Karmakar

91% match

Loading thumbnail…

Mouse Follower That Changes Color

A circle follows the mouse cursor across a full-screen SVG canvas, changing its fill color to a random RGB value on each click. The visualization demonstrates unidirectional data flow with a state object managed by `setState`, while D3 v7 selections and the `join` pattern handle SVG rendering. Mouse position events trigger state updates through `svg.on('mousemove')`, and color changes use `svg.on('click')` with random `rgb()` generation. The example uses d3.select and d3's data join to bind single elements.

Jjjlaber

89% match

Loading thumbnail…

Mouse Follower

A circle follows the mouse pointer across the screen, updating its position in real time based on cursor movement. The visualization demonstrates unidirectional data flow with D3 v7 and React, where mouse events trigger state updates that re-render the circle’s coordinates. The code uses d3-selection `select` and `join` to bind SVG elements, with an initial state centered in the viewport. The React framework manages state through a `setState` callback, while the D3 `mousemove` event handler captures pointer positions.

CCurran Kelleher

89% match

Loading thumbnail…

Mouse Follower

A black circle follows the mouse cursor across a green SVG canvas, responding instantly to pointer movement. The visualization uses React’s `useState` and `useCallback` hooks to track the mouse position and update the circle’s `cx` and `cy` attributes. The SVG element’s `onMouseMove` event handler captures the cursor coordinates, while D3’s `arc` module is imported but unused. The example demonstrates a simple interactive pattern combining React state management with SVG rendering.

TTyler Durham

89% match

Loading thumbnail…

Color Changing Mouse Follower

A circle follows the mouse cursor across the canvas, and a click randomly changes its fill color. The visualization demonstrates a unidirectional data flow pattern using D3 v7, where mouse events update a state object which then triggers a re-render of the SVG. It uses D3's `select` and `.join` operations to efficiently create and update the circle element, while the rendering logic resides in a separate `viz.js` module. The circle's position and color are driven entirely by the state managed through a custom `setState` function.

LLauren

89% match