preignition/multi-chart

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.

Displays automatic reference lines for scales.

Select a one- or two-dimensional region using the mouse or touch.

Handy data structures for elements keyed by string.

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

Register named callbacks and call them with arguments.

Drag and drop SVG, HTML or Canvas using mouse or touch input.

A parser and formatter for delimiter-separated values, such as CSV and TSV

Easing functions for smooth animation.

Force-directed graph layout using velocity Verlet integration.

Format numbers for human consumption.

Shapes and calculators for spherical coordinates.

Layout algorithms for visualizing hierarchical data.

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

Serialize Canvas path commands to SVG.

Operations for two-dimensional polygons.

Encodings that map abstract data to visual representation.

Sequential, diverging and categorical color schemes.

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

Graphical primitives for visualization, such as lines and areas.

A JavaScript time formatter and parser inspired by strftime and strptime.

Animated transitions for D3 selections.

Pan and zoom SVG, HTML or Canvas using mouse or touch input.

A simple base class for creating fast, lightweight web components

HTML templates literals in JavaScript

A markdown parser built for speed

Material Design button web component

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

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

Visualize relationships or network flow with an aesthetically-pleasing circular layout.

Compute contour polygons using marching squares.

Convenient parsing for Fetch.

Extended geographic projections for d3-geo.

Two-dimensional recursive spatial subdivision.

Generate random numbers from various distributions.

Multi-value map syntax for D3 selections.

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

A calculator for humanity’s peculiar conventions of time.

An efficient queue capable of managing thousands of concurrent animations.

Tooltips for d3 svg visualizations

Compute the Voronoi diagram of a set of two-dimensional points.

Material Components for the web wrapper for laying out form fields and labels next to one another

The Material Components for the web linear progress indicator component

Material Design tab web component

Material Design tab bar web component

Material Design textfield web component