Mouse Follower

Mouse Follower

This example demonstrates a simple interactive visualization where a circle follows the mouse cursor within an SVG canvas. It shows how React state can track pointer position and update visual elements in real-time. The code uses React’s `useState` and `useCallback` hooks to manage the mouse coordinates from the `onMouseMove` event, and renders a single circle element with dynamic `cx` and `cy` attributes. The visualization is built with React 16.9 and rendered as SVG, with the circle starting at the center of a 960×500 pixel viewport.

XXinting Yao

Mouse Follower

This example demonstrates a simple interactive visualization inside an SVG canvas: a circle continuously follows the mouse cursor across the screen. It serves as a basic demonstration of handling mouse events and updating React state in response to user input. Built with React and ReactDOM, the application uses the `useState` hook to track the cursor's `clientX` and `clientY` coordinates, updating them via the `handleMouseMove` callback attached to the SVG element's `onMouseMove` event. The rendered SVG circle’s `cx` and `cy` attributes are bound directly to the mouse position state, causing the circle to track the pointer in real time.

GGang Chen

Mouse Follower

A React-controlled SVG circle follows the mouse cursor across a fixed 960×500 viewport. Mouse coordinates are captured by the SVG’s `onMouseMove` event, processed via a `useCallback` hook, and stored in React state with `useState`. Each movement updates the circle’s `cx` and `cy` attributes, causing a re-render. The example demonstrates direct state-driven SVG updates without D3-specific interaction APIs, relying solely on React’s event handling and DOM reconciliation.

Yyejichun@naver.com

Mouse Follower

This example uses React to render an SVG circle that follows the mouse cursor across the screen. The `index.js` file initializes a React state hook with the circle’s coordinates, then updates that state on every `onMouseMove` event triggered on the SVG element. The circle’s position is bound directly to the current mouse coordinates via the `cx` and `cy` attributes, with a fixed radius of 30 pixels. The visualization relies on React’s `useState` and `useCallback` hooks, along with `ReactDOM.render` to mount the component.

GGenpinZ

Mouse Follower

This example shows a simple interactive visualization where a gray circle follows the mouse cursor across an SVG canvas. The circle starts at the center of a 960 by 500 pixel viewport and repositions instantly whenever the pointer moves. The code uses React's `useState` and `useCallback` hooks to track mouse coordinates via the SVG `onMouseMove` event, updating the circle’s `cx` and `cy` attributes through ReactDOM rendering. It demonstrates basic state-driven SVG updates in a React application.

BBen Seebeck

Mouse Follower

A circle remains fixed at the center of an SVG while React tracks the mouse position and updates the component's state. The example shows a simple interactive visualization where the cursor's coordinates are captured through the `onMouseMove` event, rendering a static shape rather than moving the circle itself. Using React 16.9 with hooks like `useState` and `useCallback`, it demonstrates a minimal state-driven component structure in ReactDOM, rendering SVG elements with hardcoded dimensions (960×500) and a circle of radius 30 pixels.

Jjeffmesie

Mouse Follower

A React component renders an SVG circle that follows the mouse pointer across a 960 by 500 viewport. The circle’s center coordinates are updated via React’s `useState` hook and a `handleMouseMove` callback attached to the SVG’s `onMouseMove` event. The `useCallback` hook memoizes the event handler, and `ReactDOM.render` mounts the app. The visualization demonstrates basic state-driven interactivity without external data, using only React and SVG primitives.

SSong Tao Chen

Mouse Follower

A React SVG visualization renders a single black circle that tracks the mouse cursor across a 960 by 500 pixel canvas. The circle’s position updates via React state and the `useState` and `useCallback` hooks, responding to `onMouseMove` events on the SVG element. The code uses `ReactDOM.render` to mount the app and has no external data source, simply displaying interactive mouse-following behavior.

Iivipaneva2002@gmail.com