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Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.


Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

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Convert React components to native Web Components.




React to Web Component

react-to-webcomponent converts React components to custom elements! It lets you share React components as native elements that don't require mounted being through React. The custom element acts as a wrapper for the underlying React component. Use these custom elements with any project that uses HTML even in any framework (vue, svelte, angular, ember, canjs) the same way you would use standard HTML elements.

Note: This is a compatibility wrapper around our new, simpler API. We highly reccomend using the new @r2wc/react-to-web-component package.


Need help or have questions?

This project is supported by Bitovi, a React consultancy. You can get help or ask questions on our:

Or, you can hire us for training, consulting, or development. Set up a free consultation.

Basic Use

For basic usage, we will use this simple React component:

const Greeting = () => {
  return <h1>Hello, World!</h1>

With our React component complete, all we have to do is call r2wc and customElements.define to create and define our custom element:

import React from "react"
import ReactDOM from "react-dom/client" // if using React 18
// import ReactDOM from "react-dom" // if using React 17

import r2wc from "react-to-webcomponent"

const WebGreeting = r2wc(Greeting, React, ReactDOM)

customElements.define("web-greeting", WebGreeting)

Now we can use <web-greeting> like any other HTML element!

  <h1>Greeting Demo</h1>


In the above case, the web-greeting custom element is not making use of the name property from our Greeting component.

Working with Attributes

By default, custom elements created by r2wc only pass properties to the underlying React component. To make attributes work, you must specify your component's props.

const Greeting = ({ name }) => {
  return <h1>Hello, {name}!</h1>

const WebGreeting = r2wc(Greeting, React, ReactDOM, {
  props: {
    name: "string",

Now r2wc will know to look for name attributes as follows:

  <h1>Greeting Demo</h1>

  <web-greeting name="Justin"></web-greeting>

For projects needing more advanced usage of the web components, see our programatic usage and declarative demos.

We also have a complete example using a third party library.


To install from npm:

npm install react-to-webcomponent


Blog Posts

R2WC with Vite View Post

R2WC with Create React App (CRA) View Post

How it works

Check out our full API documentation.

We want to hear from you.

Come chat with us about open source in our Bitovi community Discord.

See what we're up to by following us on Twitter.