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Hello Worldz

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Mmat@techstop.consulting
Last edited Mar 8, 2024
Created on Mar 8, 2024

A minimal VizHub template renders "Hello Worldz!" in centered text at a font size of 151 pixels. The `main` function receives a container element and uses its dimensions for layout, writing directly to `container.innerHTML` with inline CSS styling. This example demonstrates the V3 runtime's fundamental pattern: exporting a `main` function that receives a measured DOM element, with no separate `index.html` required.

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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