A JavaScript module is a file that exports values other files import by name. ES modules (import/export) are the standard form and run unchanged in modern browsers and Node.js. This tutorial builds a small module with a default export and a named factory function, imports it from another file, tests it with Node’s built-in runner, and loads it in the browser — the same module code in both environments, no bundler. ...
A random boolean — a coin flip that returns 1 or 0 about half the time — is the smallest building block for simulations and generative art. The function is one line; the useful part is confirming it lands on each value roughly equally and never returns anything else. This tutorial writes the function as an ES module, pins its rounding behavior with a Node test suite, prints a distribution, and paints the flips on a browser canvas. ...
A fair coin flip returns true half the time. A weighted coin flip returns true a chosen fraction of the time — 10%, 25%, whatever the simulation or generative-art piece needs. The function is one line built on Math.random(); the useful part is confirming the true rate tracks the weight and that the boundaries behave. This tutorial writes it as an ES module, pins the behavior with a Node test suite, prints a distribution at 10%, and paints the results on a browser canvas. ...
Picking a random element from an array comes up constantly: rolling dice, shuffling prompts, choosing a color. The whole job is one line of JavaScript, but the interesting part is proving it behaves — that the picks are spread across the array and never fall off either end. This tutorial builds that one-liner as an ES module, backs it with a Node test suite that pins down the boundary behavior, adds a distribution demo, and then draws the results on a browser canvas so you can see the spread. ...