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Fork of Blank Slate

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Rrichard.adamson@hotmail.com
Last edited Feb 16, 2024
Created on Feb 16, 2024

This example demonstrates the minimal structure of a VizHub V3 visualization, rendering a centered “Hello World!” message in the browser. The code uses the exported `main` function, which receives a `container` DIV element and an options object with `state` and `setState`. It sets a fixed font size and inserts the text via `container.innerHTML` with inline styling. The example highlights the hot-reloading runtime environment, where the state starts as an empty object and updates follow immutable patterns.

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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