Mouse Follower

Mouse Follower

This example displays a single black circle that follows the mouse cursor across an SVG canvas. The circle’s position updates live based on the cursor’s coordinates, which are tracked through React state. The code uses React’s `useState` and `useCallback` hooks, an SVG `<circle>` element, and D3.js version 5 for the underlying library. The rendering relies on ReactDOM to mount the component, with no additional data sources or animations beyond the direct mouse-following interaction.

SSophia Cofone

Mouse Follower

A single black circle follows the mouse cursor across a blank SVG canvas. The React component tracks pointer coordinates via the `onMouseMove` event, updating the circle’s `cx` and `cy` attributes with the client’s position. Using `useState` to hold the origin and `useCallback` for the handler, it re-renders the circle at the new location on every movement. The example demonstrates dynamic SVG updates driven by React state changes without external data.

AAlex Gomes

Mouse Follower

A single black circle follows the mouse cursor across a blank SVG canvas. The circle’s position updates in response to mouse movement via a React state hook (`useState`) and an `onMouseMove` event handler. The example uses React 16.9 for component rendering and event handling, with the SVG element created directly in JSX. No external data or D3 functions are used; only React’s state management drives the dynamic repositioning.

SSoujanya C. Aryal

Mouse Follower

A black circle follows the mouse as it moves across a blank SVG canvas. The example demonstrates React state management with the `useState` and `useCallback` hooks to track cursor coordinates. Each mouse movement updates the circle’s `cx` and `cy` attributes, while d3.v5 is loaded but not used in the visible logic. The SVG rendering is handled by React, with the circle’s position initialized at the canvas center.

OOlowogoke Seun

Mouse Follower

A black circle follows the mouse cursor across a blank SVG canvas. The example demonstrates React state management with the `useState` and `useCallback` hooks, updating circle coordinates via the `onMouseMove` event. It renders a single `<circle>` element using ReactDOM, with a fixed radius of 30 pixels, and initializes the pointer position at the center of the 960×500 viewport.

Aaredmond-re

Mouse Follower

A single black circle follows the mouse cursor across an SVG canvas. The example demonstrates how React manages dynamic state alongside D3’s rendering environment. Using React’s `useState` and `useCallback` hooks, the component tracks mouse coordinates from the SVG’s `onMouseMove` event and updates the circle’s `cx` and `cy` attributes. The circle is rendered via React’s JSX, while D3 v5 is loaded but not directly used for interaction; the visualization relies entirely on React’s state updates to redraw the SVG element in real time.

Rrstrauss127

Mouse Follower

A black circle follows the mouse cursor across a fixed 960x500 SVG canvas, remaining centered on the pointer’s exact position. Built with React’s `useState` and `useCallback`, the app listens to the SVG’s `onMouseMove` event, updates the circle’s `cx` and `cy` coordinates, and re-renders accordingly. D3 v5 is loaded but not directly used in the visible logic, while React produces the SVG elements and manages state updates.

Ttorstenaan

Mouse Follower

A single black circle tracks the mouse in real time within an SVG canvas. The example uses React's `useState` and `useCallback` hooks to capture the mouse position via the SVG `onMouseMove` event, updating the circle's `cx` and `cy` attributes. The visualization demonstrates a minimal interactive pattern, relying on React for state management and D3 v5 only for SVG rendering support, with no data source beyond the live pointer coordinates.

Aabreeson