Svelte

the disappearing framework

Adam Bar

Yet another JS framework?!

if you've heard of tools like React, Vue or Ractive, it tackles the same problems they do

Rich Harris

@rich_harris

if you've heard of tools like React, Vue or Ractive, it tackles the same problems they do

  • Component-Driven

  • {{mustache}}-based templates

  • TWo-Way data binding

  • State observing

  • Scoped CSS styles

Boring stuff

1.44 MB

IPA: /ˈsvɛlt/

attractively thin, graceful, and stylish

Wait, this new framework has   a runtime? Ugh. Thanks, I'll pass.

front end developers in 2018

var index = (function () {
	'use strict';

	function renderMainFragment(root, component) {
		var html = document.createElement('html');

		var body = document.createElement('body');
		html.appendChild(body);

		var h1 = document.createElement('h1');
		body.appendChild(h1);
		h1.appendChild(document.createTextNode("Hello World!"));

		return {
			mount: function (target, anchor) {
				target.insertBefore(html, anchor);
			},

			teardown: function (detach) {
				if (detach) {
					html.parentNode.removeChild(html);
				}
			}
		};
	}
});

fetch & parse

framework

fetch & parse

application

fetch & parse

application

apply DOM changes

apply DOM changes

interpret/bind templates

evaluate framework

evaluate application

evaluate application

Demo

Weight

TodoMvc: 3,6 kB

Interoperability

No dependencies

Standalone widgets

Mix into existing apps

Code splitting

No 1st load penalty

Tree shaking

No useless code

isomorphic

server-side rendering

Framework + N * 10 kB

N * 15 kB

?

Stream of dom updates

virtual dom optimizations

?

https://svelte.technology

https://github.com/sveltejs/svelte

Adam Bar

@Notherdev

Svelte - the disappearing framework

By Adam Bar

Svelte - the disappearing framework

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