Functions for sorting SVG elements with D3.

D3Sorting.coffee

# Requirement: https://github.com/d3/d3
# Credit: https://stackoverflow.com/a/42998001/1544937

d3.selection.prototype.setAsFrontLayer = ->

    return this.each ->

        this.parentNode.appendChild this

d3.selection.prototype.setAsBackLayer = ->

    return this.each ->

        firstChild = this.parentNode.firstChild

        if firstChild

            this.parentNode.insertBefore this, firstChild

D3Sorting.js

// Generated by CoffeeScript 2.7.0

// Requirement: https://github.com/d3/d3
// Credit: https://stackoverflow.com/a/42998001/1544937

d3.selection.prototype.setAsFrontLayer = function() {
  return this.each(function() {
    return this.parentNode.appendChild(this);
  });
};

d3.selection.prototype.setAsBackLayer = function() {
  return this.each(function() {
    var firstChild;
    firstChild = this.parentNode.firstChild;
    if (firstChild) {
      return this.parentNode.insertBefore(this, firstChild);
    }
  });
};