@vue/web-component-wrapper

Wrap and register a Vue component as a custom element.

Compatibility

Requires native ES2015 class support. IE11 and below are not supported.

Usage

import Vue from 'vue'
import wrap from '@vue/web-component-wrapper'

const Component = {
  // any component options
}

const CustomElement = wrap(Vue, Component)

window.customElements.define('my-element', CustomElement)

Interface Proxying Details

Props

• All props declared in the Vue component are exposed on the custom element as its properties. Kebab-case props are converted to camelCase properties, similar to how they are converted in Vue.

• Setting properties on the custom element updates the props passed to the inner Vue component.

• Setting attributes on the custom element updates corresponding declared props. Attributes are mapped to kebab-case. For example, a prop named someProp will have a corresponding attribute named some-prop.

• Attributes that map to props declared with type: Boolean are auto-casted into boolean values in the following rules:

  • "" or same value as attribute name: -> true

  • "true" -> true

  • "false" -> false

• Attributes that map to props declared with type: Number are auto-casted into numbers if the value is a parsable number.

Events

Custom events emitted on the inner Vue component are dispatched on the custom element as a CustomEvent. Additional arguments passed to $emit will be exposed as an Array as event.detail.

Slots

Slots work the same way as expected, including named slots. They also update when changed (using MutationObserver).

Scoped slots however, are not supported as they are a Vue specific concept.

Lifecycle

When the custom element is removed from the document, the Vue component behaves just as if it's inside a <keep-alive> and its deactivated hook will be called. When it's inserted again, the activated hook will be called.

If you wish to destroy the inner component, you'd have to do that explicitly:

myElement.vueComponent.$destroy()

Acknowledgments

Special thanks to the prior work by @karol-f in vue-custom-element.

License

MIT