How to access the parentNode of a d3.js selection?

Question

I\'ve created the following document:

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Answer 1

There are two ways to access it.
Either use the third variable like this: someNode.attr("someAttrib", function(d, i, j) { console.log(d, i, j); });. The j contains the data you supplied to the parent node.
or use d3.select(this.parentNode).data()[0].id;.

An example: