d3.event is null in a ReactJS + d3JS component

Question

I\'m using ReactJS, d3JS and ES6 to create an org chart. I can create the chart and see it. But I want to add the zoom behavior to the chart, so I used

Answer 1

Did you try importing d3 like this instead : import d3 from 'd3';

This issue seems to occur when two occurences of d3 exist in the document.