Mouse follower

Mouse follower

A smiley face rendered as a single SVG circle follows the mouse cursor across a 960×500 canvas. The React component tracks pointer coordinates via an `onMouseMove` handler and updates its position through `useState`, while D3’s `arc` utility is imported but unused. The circle’s `cx` and `cy` attributes are bound directly to the current mouse position, creating a smooth, direct mapping between input and visual output.

Nnahsiloh

mouse follower

A smiley face circle follows the mouse cursor across a 960×500 SVG canvas. The visualization tracks pointer movement and repositions the circle's center to match the cursor's coordinates in real time. Implemented with React's `useState` and `onMouseMove` event handler, the circle's `cx` and `cy` attributes update from the mouse's `clientX` and `clientY` values. D3's `arc` function and React's `ReactDOM.render` manage the circle's geometry and rendering, while the SVG element provides the drawing surface.

Yyeeet0421

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 drawn as an SVG circle follows the mouse cursor across the viewport. Built with React and D3 v5, the component tracks pointer coordinates via React's `useState` and `useCallback` hooks within an `onMouseMove` event handler. The circle's `cx` and `cy` attributes update to match the mouse position, rendering at a fixed radius of 100 pixels.

GGuus Lammers

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 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