JQPivot - component to turn a data into a summary table and then optionally add a true 2-d drag'n'drop UI to allow a user to manipulate this summary table, turning it into a pivot table, very similar to the one found in older versions of Microsoft Excel with a bunch of extra developer-oriented features and some visualization effects.

The summary table can be rendered as a Google Chart, turning the pivot table into a pivot chart.

A d3-based Treemap add-on is also included.

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Take a look at the online demo