Wrap and register a Vue component as a custom element.
-
If targeting browsers that natively support ES2015, but not native Web Components:
You will also need the Shady DOM + Custom Elements polyfill.
See caniuse.com for support on Custom Elements v1 and Shadow DOM v1.
-
Note on CSS Encapsulation When Using the Shady DOM polyfill
It's recommended to use CSS Modules instead of
<style scoped>
in your*.vue
files if you intend to use the Shady DOM polyfill, because it does not offer real style encapsulation like Shadow DOM does, so external stylesheets may affect your components if not using hashed class names. -
If targeting browsers that does not support ES2015:
Leverage the
dist/vue-wc-wrapper.es5.js
version of the library.
-
dist/vue-wc-wrapper.js
: This file is in ES modules format. It's the default export for bundlers, and can be used in browsers with<script type="module">
. -
dist/vue-wc-wrapper.global.js
: This is for old school<script>
includes in browsers that do not support<script type="module">
yet (exposeswrapVueWebComponent
global).
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)
It works with async components as well - you can pass an async component factory function that returns a Promise, and the function will only be called when an instance of the custom element is created on the page:
const CustomElement = wrap(Vue, () => import(`MyComponent.vue`))
window.customElements.define('my-element', CustomElement)
-
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 namedsome-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.
Custom events emitted on the inner Vue component are dispatched on the custom element as a CustomEvent
. Additional arguments passed to $emit
will be exposed as an Array as event.detail
.
Slots work the same way as expected, including named slots. They also update when changed (using MutationObserver
).
Scoped slots however, are not supported as they are a Vue specific concept.
When the custom element is removed from the document, the Vue component behaves just as if it's inside a <keep-alive>
and its deactivated
hook will be called. When it's inserted again, the activated
hook will be called.
If you wish to destroy the inner component, you'd have to do that explicitly:
myElement.vueComponent.$destroy()
Special thanks to the prior work by @karol-f in vue-custom-element.
MIT