How to return y coordinate of a path in d3.js?

@hal.littel 

To return the y-coordinate of a path in d3.js, you can use the .attr() or .style() methods to access the properties of the path element.

Here's an example of how you can extract the y-coordinate of a path:

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// Select the path element
var path = d3.select("path");

// Get the y-coordinate using .attr()
var yCoord = path.attr("y"); 

// Alternatively, you can use .style() to get the y-coordinate
var yCoord = path.style("y");

// If the y-coordinate is a string, you may need to parse it as a number
yCoord = +yCoord;

Note: The y-coordinate of a path will depend on the specific attributes or styles applied to it, such as y, cy, transform, etc. Make sure to use the appropriate attribute or style name based on your specific SVG structure.