Svelte continues to earn a reputation as the joy-to-work-with framework due to its lightweight nature, elegant syntax, and compile-time reactivity. It is often used for side projects, hobby apps, and small websites, but Svelte isn’t just for passion projects.
With the growing ecosystem of advanced UI components written in Svelte, it’s becoming possible to build robust dashboards, internal tools, and mission-critical apps entirely with Svelte. This article highlights the top libraries and components that are built natively in Svelte or can be easily integrated in scalable, complex Svelte apps.
✅ Advanced UI Components & Data Grids
This section lists complex UI widgets required for data-driven apps, like data grids for data management, or calendars and Gantt charts for effective planning. These might take you weeks to create if you decide to build them from scratch.
SVAR Svelte UI Components
SVAR offers a complete suite of open-source Svelte UI components suitable for enterprise-grade apps. SVAR components are available under the MIT license, except SVAR Gantt, which is licensed under GPLv3.
The SVAR components collection includes:
- Powerful and fast DataGrid (virtual scrolling for rows and columns, grouping, filtering, in-cell editors, frozen columns, and more),
- Gantt chart with drag-and-drop UI,
- File Manager for organizing files and folders in a familiar UI,
- Core library of 20+ forms controls, messages and layout components,
- Filter, or query builder, that helps you add advanced filtering feature,
- Editor that can be used as a popup/inline/sidebar edit form for any structured data on a page,
- Scheduler - a Google-like calendar (coming soon).
Tzezar Svelte DataGrid
Tzezar’s Datagrid is a lightweight, headless data table with sorting, filtering, and grouping support. Uses svelte-virtuallists for rows virtualization. Built with TypeScript, the component offers strong type safety and helpful autocompletion.
TanStack Table (Svelte)
TanStack Table is a framework-agnostic, headless library for creating feature-rich data tables, but UI has to be built manually. Written in TypeScript, it offers a @tanstack/svelte-table adapter that manages state the Svelte way and provides typed templates for cells, headers, and footers.
vkurko/calendar
EventCalendar is a pure-Svelte calendar with day/week/month/resource/timeline views, inspired by FullCalendar. Small footprint and easy theming — ideal when you need a calendar widget. Comes with light and dark themes.
FullCalendar (via wrapper)
FullCalendar is a battle-tested JavaScript calendar/scheduler used everywhere. Svelte wrapper is community-maintained and provides a quick and effective way to integrate month/week/day/list views with drag-and-drop support. Advanced views like Timeline and Vertical Resource require a commercial license (starting at $480).
svelte-gantt
svelte-gantt is a lightweight and high-performance Gantt chart and resource booking component built with Svelte. It supports drag-and-drop interaction, zooming, a tree view, dependencies, and customizable date ranges. Great for simple scheduling UIs without licensing restrictions.
🧩 UI Libraries
If you're looking to speed up your Svelte app development with a reliable UI library, this section covers some of the most popular and well-supported options. I've already mentioned SVAR Svelte Core library, which provides a set of form controls and UI elements. Here are other great choices:
Skeleton
Skeleton offers a structured framework for managing the look and feel of your web app. It includes a comprehensive design system (with a Figma UI Kit), Tailwind-powered component primitives for building complex UIs, and a set of functional components available for both React and Svelte.
shadcn-svelte
shadcn-svelte is an unofficial Svelte port of the popular React shadcn/ui. It uses a CLI to generate actual component source code into your project, giving you full control over markup, styling, and behavior. Recent updates introduced support for Svelte 5, Tailwind CSS v4, and a new chart component powered by LayerChart.
Bits UI
Bits UI is an actively maintained library of headless component primitives for Svelte 5, which can be used for building your own components. Each component exposes class and style props, making it easy to apply your own styles or use CSS frameworks like TailwindCSS or UnoCSS. All components include accessibility support.
Flowbite Svelte
Flowbite Svelte is an official Svelte version of Flowbite component set. It includes 60+ UI components and interactive elements that are often used in web apps. Built with Tailwind CSS, it supports built-in dark mode so users can toggle themes manually or follow their system preferences.
📊 Charting Libraries (for Dashboards)
Data visualization is a key part of most dashboards and internal tools. These libraries offer native Svelte components or easy integrations for building charts and interactive diagrams.
LayerChart
LayerChart is a collection of visualization components and utilities built on top of Svelte graphics framework Layer Cake. It offers a collection of mostly unopinionated chart components and utilities that can be used as building blocks for a wide range of visualizations: Bar, Area, Stack, Scatter, Pie, Arc, Sunburst, Treemap, and many more.
Chartjs (via svelte-chartjs)
Chart.js remains one of the most popular JS libraries for quick and reliable charts: bar, line, pie, radar, scatter, and more. While the svelte-chartjs wrapper is no longer maintained and doesn't support Svelte 5, you can still integrate Chart.js directly into Svelte apps.
Svelte Flow
Svelte Flow is a Svelte library for creating interactive node-based editors and diagrams. Nodes are just Svelte components that can be styled with Tailwind or plain CSS. The library also includes plug-and-play features like MiniMap, viewport controls, a grid background, and fixed overlay panels for custom UI.
🗂️ Form & Validation Tools
Forms are the backbone of most business applications. Building them efficiently in Svelte doesn’t have to be a chore. Whether you're working with dynamic form logic, validation, or server-side handling, these libraries can help you ship reliable, user-friendly forms with less boilerplate.
Superforms
Superforms is a SvelteKit form library that simplifies server and client form validation, with full type safety. It supports popular validators like Zod, Joi, JSON Schema, and more, letting you focus on forms while it manages data and errors consistently.
Felte
Felte is a lightweight JavaScript form library that helps manage form state and validation with clear error reporting. It integrates seamlessly with Svelte and offers adapters for Yup, Zod, Superstruct, and Vest.
Wrapping Up
Sure, you can use plain JavaScript components in your Svelte apps, but native Svelte solutions usually play nicer—they’re faster, easier to work with, and fit naturally into your workflow.
If you need advanced UI widgets, definitely check out SVAR’s components—they’re solid and built specifically for Svelte. And when it comes to UI libraries, popular choices like Bits UI and Skeleton offer great design and flexibility to help you build sleek, modern apps.
At the end of the day, picking the right tools is all about what fits your project best. But going native with Svelte components can make your programming life a whole lot easier.
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