Visualize Data with a Choropleth Map with zoom and filter

Visualize Data with a Choropleth Map with zoom and filter
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Please take a look to my page… I built a zoom effect and also a filter (hover over the color-legend please). The main colour also changeable by double click on color-legend.

Link to codePen : on codePen collapse the program with several error on console.

But on my webpage run well without any error… strange…
Link to the webpage

Csaba