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CCurran Kelleher
Last edited Feb 18, 2024
Created on Feb 18, 2024

This example demonstrates a minimal “Hello World” visualization built for the VizHub V3 Runtime Environment, rendering large text centered in a container using vanilla JavaScript and inline HTML styling. The code shows the required `main` export that receives a `container` DIV, whose `clientWidth` and `clientHeight` define the drawing area, and it uses immutable state management via `setState` for future interactivity. It serves as a blank template for creating more complex dashboards or interactive graphics.

AI-generated description

A blank slate starting point showing the "Hello World" for the VizHub V3 Runtime Environment, which supports continuous hot reloading with interactive widgets.

  • There is no index.html - that's what triggers the V3 Runtime
  • The entry point is the main function exported from index.js
  • The main function takes an argument container, a DIV that has measurable dimensions using clientWidth and clientHeight
  • The second argument to main is an options object containing state and setState.
  • The state of the application is stored in state, which is initialized as an empty object {}.
  • The setState function can be called with a function that uses the previous state to create a new state object using immutable update patterns.
  • For an interactive example, see Mouse Follower.

Full course playlist: YouTube: Constructing Visualization 2024.

MIT Licensed

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