JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Health & Healthcare Timeline</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/vis/4.21.0/vis.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/vis/4.21.0/vis.min.css">
    <style>
        body { font-family: Arial, sans-serif; text-align: center; margin: 0; padding: 20px; }
        #timeline-container { width: 100%; height: 85vh; transition: all 0.3s ease; }
        #fullscreen-btn {
            padding: 10px 15px;
            font-size: 16px;
            margin-bottom: 10px;
            cursor: pointer;
        }
        .vis-item {
            font-size: 14px;
            padding: 5px;
            background: lightblue;
            border-radius: 5px;
            white-space: nowrap;
        }
        .vis-group {
            font-size: 16px;
            font-weight: bold;
        }
    </style>
</head>
<body>

    <h2>Health & Healthcare Timeline</h2>
    <button id="fullscreen-btn">Toggle Fullscreen</button>
    <div id="timeline-container"></div>

    <script>
        var container = document.getElementById('timeline-container');

        var items = new vis.DataSet([
            // Health Definitions
            {id: 1, content: "WHO Health Definition (1948)", start: "1948", group: "Definitions"},
            {id: 2, content: "Huber's Positive Health (2011)", start: "2011", group: "Definitions"},
            
            // Health Trends
            {id: 3, content: "Infectious Diseases Peak (1750)", start: "1750", group: "Health Trends"},
            {id: 4, content: "Chronic Diseases Rise (2000)", start: "2000", group: "Health Trends"},
            
            // Philosophical Views (Added Missing Ones)
            {id: 5, content: "Hippocrates - Humoral Theory (-400 BC)", start: "-0400", group: "Philosophy"},
            {id: 6, content: "Plato -...