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_Angular elements_ are Angular components packaged as _custom elements_ (also called Web Components), a web standard for defining new HTML elements in a framework-agnostic way.
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[Custom elements](https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_custom_elements) are a Web Platform feature currently supported by Chrome, Edge (Chromium-based), Firefox, Opera, and Safari, and available in other browsers through polyfills (see [Browser Support](#browser-support)).
A custom element extends HTML by allowing you to define a tag whose content is created and controlled by JavaScript code.
The browser maintains a `CustomElementRegistry` of defined custom elements, which maps an instantiable JavaScript class to an HTML tag.
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## Typings for custom elements