nickzeppos

@nickzeppos·2 public vizzes

Interaction with React

A React application renders a smiley face that follows the mouse cursor across the full browser window. The face is a single SVG circle whose center coordinates update in response to mouse movement events. The component uses React’s `useState` and `useCallback` hooks to manage the mouse position state and optimize the event handler. ReactDOM renders the SVG element, which has an `onMouseMove` listener that captures the cursor’s clientX and clientY values. The example demonstrates state-driven interaction in React without any additional data sources or external visualization libraries.

Mar 26, 2021

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Smiley Face Pt 1

This example shows a cartoon smiley face built from reusable React components. The face consists of a yellow background circle, two black eyes, and a mouth shape defined by a D3 arc generator with a thick arc path. The `Face` component assembles these parts inside a `FaceContainer` that centers an SVG group via a transformation. The code uses React 17 and D3 v6 for the arc geometry, rendering in an SVG with explicit width, height, stroke, and offset proportions.

Mar 8, 2021