@antv/f2/es/deps/d3-hierarchy/src/hierarchy/sum.js

Charts for mobile visualization.

export default function (value) {
  return this.eachAfter(function (node) {
    var sum = +value(node.data) || 0,
      children = node.children,
      i = children && children.length;
    while (--i >= 0) sum += children[i].value;
    node.value = sum;
  });
}