Security News
JSR Working Group Kicks Off with Ambitious Roadmap and Plans for Open Governance
At its inaugural meeting, the JSR Working Group outlined plans for an open governance model and a roadmap to enhance JavaScript package management.
Svelte is a modern JavaScript compiler that allows you to write high-performance user interfaces with significantly less boilerplate code than traditional frameworks. It shifts much of the work to compile time, producing highly optimized vanilla JavaScript at the end.
Reactive Declarations
Svelte allows you to write reactive statements using the $: syntax. When the state changes, the reactive statements automatically update to reflect the new state.
let count = 0;
$: doubled = count * 2;
Component Definition
Components in Svelte are defined using a combination of HTML, CSS, and JavaScript, which are encapsulated within a single file with a .svelte extension.
<script>
export let name;
</script>
<h1>Hello {name}!</h1>
Store Management
Svelte provides a simple store mechanism to manage global state. The 'writable' store is a basic store that allows reading and writing values reactively.
import { writable } from 'svelte/store';
const count = writable(0);
Transitions and Animations
Svelte makes it easy to add transitions and animations to elements when they enter or leave the DOM.
import { fade } from 'svelte/transition';
<div in:fade={{ delay: 0, duration: 200 }}>Fade In</div>
Bindings
Svelte provides a concise syntax for two-way data binding to HTML elements, allowing for easy synchronization between the DOM and component state.
<script>
let value = '';
</script>
<input bind:value={value} />
React is a popular JavaScript library for building user interfaces. It uses a virtual DOM for efficient updates, and it's known for its component-based architecture. Unlike Svelte, React requires a runtime library and often involves more boilerplate code.
Vue is a progressive JavaScript framework used for building UIs and single-page applications. It is similar to Svelte in its component structure and reactivity model but differs in that it uses a virtual DOM and requires a runtime.
Angular is a platform and framework for building single-page client applications using HTML and TypeScript. It is more prescriptive than Svelte, with a complex ecosystem and a steep learning curve, and it includes features like dependency injection and RxJS integration.
Preact is a fast, 3kB alternative to React with the same modern API. It provides a similar component-based architecture but with a smaller footprint. Preact is closer to Svelte in terms of size but still operates with a virtual DOM.
Svelte is a new way to build web applications. It's a compiler that takes your declarative components and converts them into efficient JavaScript that surgically updates the DOM.
Learn more at the Svelte website, or stop by the Discord chatroom.
You can play around with Svelte in the tutorial, examples, and REPL.
When you're ready to build a full-fledge application, we recommend using SvelteKit:
npm create svelte@latest my-app
cd my-app
npm install
npm run dev
See the SvelteKit documentation to learn more.
The Changelog for this package is available on GitHub.
Svelte is an MIT-licensed open source project with its ongoing development made possible entirely by fantastic volunteers. If you'd like to support their efforts, please consider:
Funds donated via Open Collective will be used for compensating expenses related to Svelte's development.
FAQs
Cybernetically enhanced web apps
We found that svelte demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
At its inaugural meeting, the JSR Working Group outlined plans for an open governance model and a roadmap to enhance JavaScript package management.
Security News
Research
An advanced npm supply chain attack is leveraging Ethereum smart contracts for decentralized, persistent malware control, evading traditional defenses.
Security News
Research
Attackers are impersonating Sindre Sorhus on npm with a fake 'chalk-node' package containing a malicious backdoor to compromise developers' projects.