This project is read-only.


The Canvas graphing library.

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Please fork with your question or bug reproduction case.


The API consists of a primary draw method which accepts a configuration object, helper methods, and several microlibs.


// Container div:
container = document.getElementById("flotr-example-graph"),
// First data series:
d1 = [0, 3], [4, 8], [8, 5], [9, 13],
// Second data series:
d2 = [],
// A couple flotr configuration options:
options = {
xaxis: {
minorTickFreq: 4
grid: {
minorVerticalLines: true
i, graph;

// Generated second data set:
for (i = 0; i < 14; i += 0.5) {
d2.push([i, Math.sin(i)]);

// Draw the graph:
graph = Flotr.draw(
container, // Container element
d1, d2, // Array of data series
options // Configuration options




Flotr may be extended by adding new plugins and graph types.

Graph Types

Graph types define how a particular chart is rendered. Examples include line, bar, pie.

Existing graph types are found in js/types/.


Plugins extend the core of flotr with new functionality. They can add interactions, new decorations, etc. Examples include titles, labels and selection.

The plugins included are found in js/plugins/.


This project uses smoosh to build and jasmine with js-imagediff to test. Tests may be executed by jasmine-headless-webkit with cd spec; jasmine-headless-webkit -j jasmine.yml -c or by a browser by navigating to flotr2/spec/SpecRunner.html.


Thanks to Bas Wenneker, Fabien Ménager and others for all the work on the original Flotr. Thanks to Jochen Berger and Jordan Santell for their contributions to Flotr2.

Last edited Jan 21, 2013 at 5:29 AM by stevenbburns, version 2