import * as d3 from 'd3';
d3.selection.prototype.appendSelect = function(element, classString) {
const selected = classString ?
this.select(`${element}.${classString.split(' ').join('.')}`) :
this.select(element);
if (selected.empty()) {
return classString ?
this.append(element).classed(classString, true) :
this.append(element);
}
return selected;
};
export default d3;
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