window.customElements

The window.customElements read-only property returns a reference to the CustomElementRegistry object, which can be used to register custom elements, and get information about registered custom elements.

Syntax

customElements = window.customElements

Examples

class BasicElement extends HTMLElement {
  connectedCallback() {
    this.textContent = 'Just a basic custom element.';
  }
}
customElements.define('basic-element', BasicElement);

Specification

Browser compatibility