Add Comments to Your SolidJS App

npm install fastcomments-solidjs

import { FastCommentsCommentWidget } from 'fastcomments-solidjs';

export default function App() {
  return <FastCommentsCommentWidget tenantId="demo" urlId="some-page-id" />;
}

Solid does not automatically track deep mutations on arbitrary objects, so config changes after the first render must be pushed explicitly. Every widget accepts an apiRef that returns a handle; call handle.update(partial) from a createEffect to drive reactivity:

import { createEffect, createSignal } from 'solid-js';
import { FastCommentsCommentWidget, type FastCommentsCommentWidgetHandle } from 'fastcomments-solidjs';

export default function Paginated() {
  const [page, setPage] = createSignal(0);
  let handle: FastCommentsCommentWidgetHandle | undefined;
  createEffect(() => handle?.update({ urlId: `product-${page()}` }));

  return (
    <>
      <button onClick={() => setPage(page() + 1)}>next</button>
      <FastCommentsCommentWidget
        apiRef={(h) => (handle = h)}
        tenantId="demo"
        urlId={`product-${page()}`}
      />
    </>
  );
}

update() is safe to call at any time:

• Before the script has loaded: the partial is stashed and applied at init.
• During an async init (reviews-summary, user-activity-feed): the partial is queued and applied when the callback resolves.
• After init: it forwards straight to the live widget's .update() method.

Imperative handle API

interface WidgetHandle<Config> {
  getInstance: () => WidgetInstance | null;   // latest live instance (or null before mount)
  onInstance: (cb: (instance: WidgetInstance) => void) => void; // fires once instance is ready
  update: (partial: Partial<Config>) => void; // merge-and-push config
}

Use getInstance() for imperative actions that aren't covered by .update(), e.g. openProfile:

const openProfile = () =>
  (handle?.getInstance() as { openProfile?: (o: { userId: string }) => void } | null)
    ?.openProfile?.({ userId: 'demo' });

Every widget from fastcomments-react is available under the same name:

Widgets that attach to an existing element

FastCommentsCollabChatWidget and FastCommentsImageChatWidget mount into a caller-supplied element. Pass a targetRef accessor that returns the element once mounted:

import { FastCommentsImageChatWidget } from 'fastcomments-solidjs';

export default function ImageChat() {
  let img: HTMLImageElement | undefined;
  return (
    <>
      <img ref={img} src="/screenshot.png" alt="" />
      <FastCommentsImageChatWidget
        tenantId="demo"
        urlId="my-image"
        targetRef={() => img}
      />
    </>
  );
}

Regions

Pass region="eu" to route widget traffic through the EU cluster.

A full showcase app lives in examples/example-showcase/. It mirrors the React showcase and covers every widget plus common flows (dark mode, pagination, SSO, callbacks).

cd examples/example-showcase
npm install
npm run dev

npm install
npm run build       # library -> dist/
npm test            # vitest smoke test
npm run build:demo  # showcase -> demo-dist/