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D4 is an ongoing project to port the D3 JavaScript library to the Dart language.


D4 is an ongoing project to port the D3 JavaScript library to the Dart language.

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D4 brings to the Dart language and Flutter ecosystem all the power of D3 (or D3.js) — a free, open-source JavaScript library for data visualization. D4 offers a suite of low-level tool libraries that enable the creation of data-driven documents, connecting Dart and HTML, as well as dynamic and interactive visualizations for multiplatform Flutter applications — mobile, web, desktop, and embedded — from a single codebase.

See one of:

  • d4_array - List manipulation, ordering, searching, summarizing, etc.
  • d4_color - Color spaces! RGB, HSL, Cubehelix, CIELAB, and more.
  • d4_dsv - A parser and formatter for delimiter-separated values, such as CSV and TSV.
  • d4_format - Format numbers for human consumption.
  • d4_geo - Geographic projections, spherical shapes and spherical trigonometry.
  • d4_interpolate - Interpolate numbers, colors, strings, lists, maps, whatever!
  • d4_path - Serialize Canvas path commands to SVG.
  • d4_polygon - Geometric operations for two-dimensional polygons.
  • d4_random - Generate random numbers from various distributions.
  • d4_scale - Encodings that map abstract data to visual representation.
  • d4_scale_chromatic - Sequential, diverging and categorical color scales.
  • d4_shape - Graphical primitives for visualization, such as lines and areas.
  • d4_time - A calculator for humanity’s peculiar conventions of time.
  • d4_time_format - Parse and format times, inspired by strptime and strftime.