[Solved]-Adding child elements to specific nodes in a force-directed graph using d3js-d3.js

After reading selection.data on the d3 wiki again, i finally got it working.

I merged my notes beforehand, so my selection included the enter and update nodes. What i did now was first to create the enter nodes, then do the selections and filters on them and merge them afterwards.

function draw() {
    self.domNodes = self.domNodes.data(self.nodes, (node) => node.id)
    self.domNodes.exit().remove()

    // all nodes
    const enterNodes = self.domNodes.enter()
      .append('g')
      .attr('class', (node) => `node ${node.type}`)

    // contributions
    enterNodes.filter((d) => d.type === 'contribution')
      .append('circle')
      .attr('r', 4)
      .attr('fill', 'blue')

    // persons
    enterNodes.filter((d) => d.type === 'person')
      .append('other elements and attributes...')

    self.domNodes = self.domNodes.merge(enterNodes)

    self.simulation.nodes(self.nodes)
    self.simulation.force('link').links(self.links)
    self.simulation.alpha(1).restart()
}