JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
  <div id="tree"></div>
</div>

CSS

/* Thee */
body{background:#fff;}
* {
  padding: 0;
}

.tree ul {
    padding-top: 20px; position: relative;

    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

.tree li {
    float: left; text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0 5px;

    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

.tree li::before, .tree li::after{
    content: '';
    position: absolute; top: 0; right: 50%;
    border-top: 1px solid #ccc;
    width: 50%; height: 20px;
}
.tree li::after{
    right: auto; left: 50%;
    border-left: 1px solid #ccc;
}

.tree li:only-child::after, .tree li:only-child::before {
    display: none;
}

.tree li:only-child{ padding-top: 0;}

.tree li:first-child::before, .tree li:last-child::after{
    border: 0 none;
}

.tree li:last-child::before{
    border-right: 1px solid #ccc;
    border-radius: 0 5px 0 0;
    -webkit-border-radius: 0 5px 0 0;
    -moz-border-radius: 0 5px 0 0;
}

.tree li:first-child::after{
    border-radius: 5px 0 0 0;
    -webkit-border-radius: 5px 0 0 0;
    -moz-border-radius: 5px 0 0 0;
}

.tree ul ul::before{
    content: '';
    position: absolute; top: 0; left: 50%;
    border-left: 1px solid #ccc;
    width: 0; height: 20px;
}

.tree li a{
    border: 1px solid #ccc;
    padding: 5px 10px;
    text-decoration: none;
    color: #666;
    font-family: arial, verdana, tahoma;
    font-size: 11px;
    display: inline-block;

    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;

    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

.tree li a:hover, .tree li a:hover+ul li a {
    background: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}

.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
    border-color:  red;
}

JavaScript

'use strict';

/*
  var treeDataJs = {
      name    : "TreeData.js",
      author  : "Raphael Amorim",
      email   : "[email protected]",
      github  : "https://github.com/raphamorim/treeStructure"
  };
*/

/* Receive data and create tree */
function TreeData (data, select) {
    var main = document.querySelector(select);

    var treecanvas = document.createElement('div');
        treecanvas.className = 'tree';

    var treeCode = buildTree(data, Object.keys(data)[0]);

    treecanvas.innerHTML = treeCode;

    main.appendChild(treecanvas);
}

/* Recursive function to build tree structure :) */
function buildTree (obj, node) {
    var treeString = "<li><a href='#'>" + obj[node].value + "</a>";
    var sons = [];

    for (var i in obj) {
        if (obj[i].parent == node)
          sons += i;
    }

    if (sons.length > 0) {
        treeString += "<ul>";

        for (var i in sons) {
          treeString += buildTree(obj, sons[i]);
        }

        treeString += "</ul>";
    }

    return treeString;
}

var tree = {
     father : {value : "徳川家家系図", parent : ""},
     a : {value : "家康", parent : "father"},
     b : {value : "延安", parent : "a"},
     c : {value : "秀忠", parent : "a"},
     d : {value : "忠長", parent : "c"},
     e : {value : "秀康", parent : "a"},
     f : {value : "家光", parent : "c"},
     g : {value : "家綱", parent : "f"},
     h : {value : "千姫", parent : "c"},
     i : {value : "初姫", parent : "c"},
     j : {value : "綱重", parent : "f"},
     k : {value : "家宣", parent : "j"},
     p : {value : "清武", parent : "j"},
     l : {value : "綱吉", parent : "g"},
     m : {value : "家宣", parent : "l"},
     n : {value : "徳松", parent : "l"},
     o : {value : "鶴姫", parent : "l"},
     q : {value : "家継", parent : "m"}
        
};
TreeData(tree, "#tree");