Wrapping React Components Inside Custom Elements

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Web Components

React and Web Components

Wrapping React Component inside a Custom Element

export default class CollapsiblePanel extends HTMLElement {}window.customElements.define('collapsible-panel', CollapsiblePanel);
mountPoint: HTMLSpanElement;
title: string;
connectedCallback() {
this.mountPoint = document.createElement('span');
const shadowRoot = this.attachShadow({ mode: 'open' });

const title = this.getAttribute('title');
ReactDOM.render(this.createCollapsed(title), this.mountPoint);
createCollapsed(title) {
return React.createElement(CollapsibleReact, { title }, React.createElement('slot'));
static get observedAttributes() {
return ['title'];
attributeChangedCallback(name, oldValue, newValue) {
if (name === 'title') {
ReactDOM.render(this.createCollapsed(newValue), this.mountPoint);

Re-targeting React Events

Testing The Wrapper

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Angular app hosting a React wrapped component


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Hardcore web developer, @sparXys CEO, Google Web Technologies GDE, Microsoft MVP, Pro SPA Development co-author, husband, dad and a geek.

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