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How to get the data of a node in d3

In my previous article on enter, update and exit selections, I discussed how d3 binds data to nodes using the data() function. How about the inverse case where you have a reference to a node to which data is supposedly bound and you want to get the value of that data. Take another case - when you have a reference to a node, but you want to access the data that is bound to a parent node. Turns out, you can easily get the data bound to a node as follows;
where your_node is a reference to the actual DOM node.

Also Read:

  1. Using d3js to draw a bar chart with an axis and some basic transitions
  2. Getting the parameters and arguments of a javascript function
  3. A visual explanation of the Enter, Update and Exit Selections in D3js
  4. Creating an Animated Ring or Pie chart in d3js
  5. JavaScript Objects and Arrays Useful Methods
  6. Getting started with es6 generator functions
  7. Render a d3 tree with a minimum distance between the tree nodes
  8. d3 Fundamentals : Understanding domain, range and scales in D3js