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uhtml (micro µ html) is one of the smallest, fastest, memory consumption friendly, yet zero-tools based, library to safely help creating or manipulating DOM content.

📣 uhtml v4 is out


Release Notes


  • uhtml as default { Hole, render, html, svg, attr } with smart auto-keyed nodes - read keyed or not ? paragraph to know more
  • uhtml/keyed with extras { Hole, render, html, svg, htmlFor, svgFor, attr }, providing keyed utilities - read keyed or not ? paragraph to know more
  • uhtml/node with same default exports but it's for one-off nodes creation only so that no cache or updates are available and it's just an easy way to hook uhtml into your existing project for DOM creation (not manipulation!)
  • uhtml/init which returns a document => uhtml/keyed utility that can be bootstrapped with uhtml/dom, LinkeDOM, JSDOM for either SSR or Workers support
  • uhtml/ssr which exports an utility that both SSR or Workers can use to parse and serve documents. This export provides same keyed utilities except the keyed feature is implicitly disabled as that's usually not desirable at all for SSR or rendering use cases, actually just an overhead. This might change in the future but for now I want to benchmark and see how competitive is uhtml/ssr out there. The uhtml/dom is also embedded in this export because the Comment class needs an override to produce a super clean output (at least until hydro story is up and running).
  • uhtml/dom which returns a specialized uhtml compliant DOM environment that can be passed to the uhtml/init export to have 100% same-thing running on both client or Web Worker / Server. This entry exports { Document, DOMParser } where the former can be used to create a new document while the latter one can parse well formed HTML or SVG content and return the document out of the box.
  • uhtml/reactive which allows usage of symbols within the optionally keyed render function. The only difference with other exports, beside exporting a reactive field instead of render, so that const render = reactive(effect) creates a reactive render per each library, is that the render(where, () => what), with a function as second argument is mandatory when the rendered stuff has signals in it, otherwise these can't side-effect properly.
    • uhtml/signal is an already bundled uhtml/reactive with @webreflection/signal in it, so that its render exported function is already reactive. This is the smallest possible bundle as it's ~3.3Kb but it's not nearly as complete, in terms of features, as preact signals are.
    • uhtml/preactive is an already bundled uhtml/reactive with @preact/signals-core in it, so that its render exported function, among all other preact related exports, is already working. This is a drop-in replacement with extra Preact signals goodness in it so you can start small with uhtml/signal and switch any time to this more popular solution.

uhtml/init example

import init from 'uhtml/init';
import { Document } from 'uhtml/dom';

const document = new Document;

const {
  html, svg,
  htmlFor, svgFor,
} = init(document);

uhtml/preactive example

import { render, html, signal, detach } from 'uhtml/preactive';

const count = signal(0);

render(document.body, () => html`
  <button onclick=${() => { count.value++ }}>
    Clicks: ${count.value}

// stop reacting to signals in the future
setTimeout(() => {
}, 10000);