How to export dc.js filtered data

Question

I'm using dc.js library to generate graphs and I would like to be able to retrieve the filtered data when filters are applied.

Answer 1

Create another dimension and then call dimension.top(Infinity) on it.

https://github.com/square/crossfilter/wiki/API-Reference#dimension_top

You will need the extra dimension because dimensions do not observe their own filters, only the filters on other dimensions.

Then you can use e.g. d3.csv.format to produce text, if you need to.

https://github.com/mbostock/d3/wiki/CSV#format

Answer 2

In the version 4 of d3.js d3.csv.format doesn't exist, you must use d3.csvFormat instead.

const cf = crossfilter(data);

csvDimension = cf.dimension( x => x );

csvContent = d3.csvFormat(csvDimension.top(Infinity), [field, field2, ...]);

As Gordon said, csvDimension must be a new dimension in order for the filters to be applied.