preignition/multi-geo

The Polymer library makes it easy to create your own web components. Give your element some markup and properties, and then use it on a site. Polymer provides features like dynamic templates and data binding to reduce the amount of boilerplate you need to write

Array manipulation, ordering, searching, summarizing, etc.

Color spaces! RGB, HSL, Cubehelix, Lab and HCL (Lch).

Format numbers for human consumption.

Group two-dimensional points into hexagonal bins.

Encodings that map abstract data to visual representation.

Data-driven DOM manipulation: select elements and join them to data.

Multi-value map syntax for D3 selections.

A simple base class for creating fast, lightweight web components

HTML templates literals in JavaScript

Manipulate TopoJSON and convert it to GeoJSON.

Topology-preserving simplification and filtering for TopoJSON.

Testing following open-wc recommendations

Testing with karma following open-wc recommendations

Web Components Polyfills

Development server for modern web apps

A markdown parser built for speed

The ESM-powered frontend build tool. Fast, lightweight, unbundled.

Small helpers for LitElement to dispatch change notifications and two-way binding

lit-element components for building charts and visualization (based on d3.js v5).

Utils mixin used by Preignition-mixin. To be consumed by lit-element components

Register named callbacks and call them with arguments.

Easing functions for smooth animation.

Shapes and calculators for spherical coordinates.

Interpolate numbers, colors, strings, arrays, objects, whatever!

Sequential, diverging and categorical color schemes.

A calculator for humanity’s peculiar conventions of time.

An efficient queue capable of managing thousands of concurrent animations.

Animated transitions for D3 selections.

vaadin-tabs

API documentation and live playground for Web Components

A legend component for d3. Given a d3.scale it can create either a color legend, size legend, or symbol legend.

Small helper methods or mixins to help you build web apps.