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Pre-built UI component libraries for server-rendered HTML: Preline UI, HyperUI, Flowbite. Modals, tables, forms, navbars, dropdowns — no React, no build step. Trigger: UI components, component library, Preline, HyperUI, Flowbite, Tailwind CSS components, pre-built UI.
| name | ui-components |
| description | Pre-built UI component libraries for server-rendered HTML: Preline UI, HyperUI, Flowbite. Modals, tables, forms, navbars, dropdowns — no React, no build step. Trigger: UI components, component library, Preline, HyperUI, Flowbite, Tailwind CSS components, pre-built UI. |
| license | Apache-2.0 |
| metadata | {"author":"vekzz-dev","version":"1.0"} |
| Library | Components | JS | HTMX | Alpine | License |
|---|---|---|---|---|---|
| Preline UI | 640+ (modals, datatables, forms, nav, datepicker) | Headless (replaceable) | ✅ Perfect | ✅ Drop-in | MIT |
| HyperUI + HyperUX | ~200 + 9 Alpine patterns | None / Alpine-native | ✅ Perfect | ✅ Built with Alpine | MIT |
| Flowbite | 56+ categories, charts, datatables | flowbite.js required | ⚠️ Needs reinit after swap | ⚠️ Adaptable | MIT |
Recommendation: Start with Preline UI — best component coverage and zero friction with HTMX + Alpine.
Setup:
<!-- In your Thymeleaf layout -->
<html xmlns:th="http://www.thymeleaf.org">
<head>
<script src="https://cdn.tailwindcss.com"></script>
<!-- Preline JS (headless — optional, replace with Alpine) -->
<script src="https://cdn.jsdelivr.net/npm/preline/dist/preline.js" defer></script>
<script defer src="https://cdn.jsdelivr.net/npm/alpinejs@3/dist/cdn.min.js"></script>
</head>
Or with npm in a Spring Boot static resources setup:
npm install preline
Then in your Tailwind config:
module.exports = {
content: [
'./src/main/resources/templates/**/*.html',
'./node_modules/preline/dist/*.js',
],
plugins: [require('preline/plugin')],
}
Example — Modal with Alpine instead of Preline JS:
<!-- Preline HTML structure + Alpine for interactivity -->
<div x-data="{ open: false }">
<button @click="open = true" type="button"
class="py-2 px-4 bg-blue-600 text-white rounded-lg">
Open Modal
</button>
<div x-show="open" x-cloak
class="fixed inset-0 z-50 flex items-center justify-center">
<div class="absolute inset-0 bg-black/50" @click="open = false"></div>
<div class="relative bg-white rounded-xl shadow-lg p-6 max-w-md w-full">
<h3 class="text-lg font-semibold">Modal Title</h3>
<p class="mt-2 text-gray-600">Modal content here</p>
<button @click="open = false" class="mt-4 px-4 py-2 bg-gray-200 rounded">Close</button>
</div>
</div>
</div>
Example — Table with HTMX:
<!-- Thymeleaf template -->
<div class="overflow-x-auto rounded-xl border">
<table class="min-w-full divide-y divide-gray-200">
<thead class="bg-gray-50">
<tr>
<th class="px-6 py-3 text-left text-sm font-medium text-gray-500">Name</th>
<th class="px-6 py-3 text-left text-sm font-medium text-gray-500">Role</th>
<th class="px-6 py-3 text-right text-sm font-medium text-gray-500">Actions</th>
</tr>
</thead>
<tbody class="divide-y divide-gray-200" id="user-table">
<tr th:each="user : ${users}"
class="hover:bg-gray-50 transition"
th:include="fragments/user-row :: row">
</tr>
</tbody>
</table>
</div>
<!-- Delete button in fragment -->
<button hx-delete="@{/users/{id}(id=${user.id})}"
hx-target="#user-table"
hx-swap="outerHTML"
hx-confirm="Delete this user?"
class="text-red-600 hover:text-red-800 text-sm font-medium">
Delete
</button>
HyperUI is pure HTML + Tailwind — zero JavaScript. Copy and paste.
<!-- Alert from HyperUI (no JS) -->
<div class="rounded-xl border border-gray-100 bg-white p-4">
<div class="flex items-start gap-4">
<span class="text-green-600">
<svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
</svg>
</span>
<div class="flex-1">
<strong class="block font-medium text-gray-900"> Changes saved </strong>
<p class="mt-1 text-sm text-gray-700">Your profile has been updated.</p>
</div>
</div>
</div>
HyperUX is its companion — built with Alpine.js for interactive components:
<!-- Dropdown from HyperUX -->
<div x-data="{ open: false }" class="relative">
<button @click="open = !open"
class="flex items-center gap-2 px-4 py-2 bg-white border rounded-lg">
Options
<svg x-bind:class="open && '-rotate-180'" class="w-4 h-4 transition">...</svg>
</button>
<div x-show="open" @click.outside="open = false"
class="absolute right-0 mt-2 w-48 bg-white border rounded-lg shadow-lg py-1">
<a href="#" class="block px-4 py-2 text-sm hover:bg-gray-50">Profile</a>
<a href="#" class="block px-4 py-2 text-sm hover:bg-gray-50">Settings</a>
<hr class="my-1">
<a href="#" class="block px-4 py-2 text-sm text-red-600 hover:bg-red-50">Logout</a>
</div>
</div>
Flowbite's JS hooks into data-modal-target, data-dropdown-toggle, etc.
After an HTMX swap, you must reinitialize:
<script>
document.addEventListener('htmx:afterSwap', function() {
initFlowbite(); // reattach event listeners after HTMX updates the DOM
});
</script>
Or skip flowbite.js entirely and use Alpine for the same components:
<!-- Flowbite card (no JS needed) -->
<div class="max-w-sm bg-white border border-gray-200 rounded-xl shadow-sm">
<img class="rounded-t-xl" src="/img/photo.jpg" alt="">
<div class="p-5">
<h5 class="text-xl font-bold tracking-tight text-gray-900">Card title</h5>
<p class="mt-2 text-gray-600">Card description here.</p>
<a href="#" class="inline-flex mt-3 px-4 py-2 text-sm font-medium text-white bg-blue-700 rounded-lg hover:bg-blue-800">
Read more
</a>
</div>
</div>
| Need | Library |
|---|---|
| Maximum component variety | Preline UI |
| Zero JS dependency, pure HTML | HyperUI |
| Alpine-native interactive components | HyperUX |
| Charts, datatables, datepicker | Preline UI |
| Quick dashboard layout | Flowbite (templates) or Preline (blocks) |
# Preline with npm (Spring Boot static resources)
npm install preline
# Tailwind config for Preline
npx tailwindcss init -p
Server-side web UI with Spring Boot: Thymeleaf templates, HTMX for dynamic interactions, Alpine.js for client-side behavior. No React, no webpack. Trigger: Thymeleaf, HTMX, Alpine.js, Spring MVC template, server-side rendering, web UI.
REST API design best practices: resource naming, versioning, error handling, pagination, HATEOAS, rate limiting, OpenAPI documentation. Trigger: API design, REST API, endpoint, OpenAPI, RESTful, API versioning, or API documentation.
Docker and containerization best practices: multi-stage builds, docker-compose, networking, volumes, security, and image optimization. Trigger: Docker, Dockerfile, docker-compose, container, image build, or containerization.
General database design principles: modeling, normalization, indexing, naming conventions, migrations, and query optimization. Trigger: Database design, data modeling, schema design, table design, or migration planning.
Comprehensive best practices for developing high-quality Spring Boot applications with production-ready patterns. Trigger: When developing Spring Boot applications, need best practices, or working with Spring framework.
Expert Spring Boot testing specialist that selects the best testing techniques for your situation with JUnit and AssertJ. Trigger: When writing Spring Boot tests, need testing patterns, or working with test slices.