Mouse Follower

Mouse follower

A smiley face drawn with SVG circles follows the cursor inside a 960 by 500 canvas. The React component tracks mouse movements via an `onMouseMove` handler, updating state to reposition a single circle. While the static markup comments include a complete face, the active code renders only the follower circle using React's `useState` and `useCallback`. The example demonstrates combining React's declarative updates with D3's SVG scene graph for interactive visualizations.

Vvijaytayal

Mouse Follower

This is a React application that renders a single smiley face as an SVG circle, which follows the mouse cursor across the screen. The component tracks pointer movement through React's `useState` and `useCallback` hooks, updating the circle's center coordinates with each mouse event. The SVG is rendered with React, while the page loads React and D3 v5 from CDN links in the HTML. The interactive behavior is driven entirely by React's event handling, not by D3's own mouse utilities.

JJames Huang

Mouse Follower

A smiley face follows the mouse cursor across an SVG canvas, with its position updating in real time. The visualization uses React state and the `useState` and `useCallback` hooks to track mouse coordinates, which are passed to an SVG `<circle>` element’s `cx` and `cy` attributes. The `onMouseMove` event handler on the `<svg>` element triggers the state update, while ReactDOM renders the component. No D3 APIs are used; the example relies purely on React’s declarative rendering with SVG.

Yyinhao0424

Mouse Follower

A smiley face rendered in SVG follows the cursor inside a 960×500 viewport. The React component tracks mouse movement via the `onMouseMove` handler and updates the circle’s position using state and the `useCallback` hook. The face is drawn with a yellow circle and two black eye circles, though the eyes remain static while the entire group moves. Rendering relies on React DOM with SVG elements, and the example highlights state-driven updates without external data sources.

SStefano Renzetti

Mouse Follower

A smiley face follows the mouse cursor across the screen, rendered as a single SVG circle that moves in real time. The React component tracks pointer coordinates via the `onMouseMove` event handler, updating state with `useState` and `useCallback` to reposition the circle’s center. The visualization uses React DOM to render the SVG element directly to the page, with the circle’s radius fixed at 30 pixels. No external data sources are involved; the interaction is purely based on mouse position.

FFarahnaz Wick

Mouse Follower

A smiley face rendered as an SVG circle follows the mouse cursor across the full window. React state tracks the pointer position via an `onMouseMove` handler, and the circle’s `cx` and `cy` attributes update accordingly. The implementation uses React 16.9 with hooks (`useState`, `useCallback`) and renders directly to SVG, with the viewport size set from `window.innerWidth` and `window.innerHeight`.

NNitin Vadhiya

Mouse Follower

This example shows a smiley face rendered as an SVG that follows the mouse cursor across the full browser viewport. The React component tracks the pointer position through an `onMouseMove` event handler on the SVG element, updating the circle’s `cx` and `cy` coordinates via React state. The code uses React 16.9 with `useState` and `ReactDOM.render`, alongside core SVG primitives such as `<circle>` and `<g>`. The initial mouse position is centered at half the window’s width and height.

Ssophiasharif

Mouse Follower

A smiley face drawn in SVG follows the cursor as it moves across the viewport. React manages the circle’s position via the `useState` and `useCallback` hooks, updating `cx` and `cy` attributes on every `onMouseMove` event. The example uses React 16.9 and renders directly into a full-screen SVG element without any data source.

KKIRRAN P L