JSFiddle - React, Tailwind, and code Playground

JavaScript

var root = {
  "name": "Root",
  "children": [
    {
      "name": "Item 1",
      "title":  "This is a test title",
      "children": [
        {
          "name": "Child 1",
          "children": [
            {
              "name": "A",
              "size": 3938
            },
            {
              "name": "B",
              "size": 3812
            },
            {
              "name": "C",
              "size": 6714
            }
          ]
        },
        {
          "name": "Child 2",
          "title":  "This is a second test title",
          "children": [
            {
              "name": "D",
              "size": 3534
            },
            {
              "name": "E",
              "size": 5731
            },
            {
              "name": "F",
              "size": 7840
            },
            {
              "name": "G",
              "size": 5914
            },
            {
              "name": "H",
              "size": 3416
            }
          ]
        },
        {
          "name": "Child 3",
          "children": [
            {
              "name": "I",
              "size": 7074
            }
          ]
        }
      ]
    },
    {
      "name": "Item 2",
      "children": [
        {
          "name": "Child 1",
          "children": [
            {
              "name": "A",
              "size": 3938
            },
            {
              "name": "B",
              "size": 3812
            },
            {
              "name": "C",
              "size": 6714
            }
          ]
        },
        {
          "name": "Child 2",
          "children": [
            {
              "name": "D",
              "size": 3534
            },
            {
              "name": "E",
              "size": 5731
            },
            {
              "name": "F",
              "size": 7840
            },
            {
              "name": "G",
              "size": 5914
            },
            {
...