Working demos.
Each one demonstrates a specific SDK concept. Click through — the code behind it is described in the articles.
GeoJSON Choropleth from a Live API
How to fetch a government data API, aggregate it client-side, and render a choropleth — no server, no framework, one HTML file. The pattern that makes ArcGIS SDK faster to ship than a dashboard tool.
Open Demo →
Dynamic Renderers and WebGL Feature Effects
How to switch renderers at runtime, apply WebGL glow and bloom effects per feature, and wire a custom hit-test — all in one map. The SDK capabilities that Experience Builder cannot expose.
Open Demo →
Client-Side Renderer Mutation
How to change class breaks, opacity, and color ramps on a live layer without touching the server. The renderer object is mutable — most developers never use this. This demo shows what that unlocks.
Open Demo →
Client-Side Join Across Two Federal Datasets
How to join CDC SVI and FEMA NRI at the census tract level in the browser, expose the result as interactive filter controls, and let users build their own combined risk view — no backend required.
Open Demo →