88 lines
3.9 KiB
Plaintext
88 lines
3.9 KiB
Plaintext
# CustomElement
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A renderless component to aid with the creation of HTML custom elements a.k.a
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WebComponents.
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All of the CustomElement component arguments are only used at construction
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time (within the components constructor) therefore they are, by design, static.
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You shouldn't be dynamically updating these values at all. They are only for
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type checking and documention purposes and therefore once defined/hardcoded
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they should only change if you as the author wishes to change them.
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The component is built from various other components, also see their documentaton
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for further details (`<ShadowHost />`, `<ShadowTemplate />`).
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```hbs preview-template
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<CustomElement
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@element="x-component"
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@attrs={{array
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(array 'type' '"awesome" | "sauce"' 'awesome' 'Set the type of the x-component')
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(array 'x' 'number' 0 'The x-ness of the x-component')
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}}
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@cssprops={{array
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(array '--awesome-x-sauce' 'length' '[x]' 'Makes the x-ness of the sauce available to CSS, automatically synced/tracked from the x attributes')
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(array '--awesome-color' 'color' undefined 'This CSS property can be used to set the color of the awesome')
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}}
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@cssparts={{array
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(array 'base' 'Style base from The Outside via ::part(base)')
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}}
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@slots={{array
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(array 'header' "You'll want to document the slots also")
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(array '' 'Including the default slot')
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}}
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as |custom element|>
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<x-component
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{{did-insert custom.connect}}
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{{will-destroy custom.disconnect}}
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aria-hidden="true"
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...attributes
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>
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<custom.Template
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@styles={{css-map
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}}
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>
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<div part="base"
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data-x={{element.attrs.x}}
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data-type={{element.attrs.type}}
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>
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<slot name="header"></slot>
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<slot></slot>
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</div>
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</custom.Template>
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</x-component>
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</CustomElement>
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```
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## Arguments
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All `descriptions` in attributes will be compiled out at build time as well as the `@description` attribute itself.
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| Attribute | Type | Default | Description |
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| :------------ | :------------- | :------ | :------------------------------------------------------------------------- |
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| element | string | | The custom tag to be used for the custom element. Must include a dash |
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| description | string | | Short 1 line description for the element. Think "git commit title" style |
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| attrs | attrInfo[] | | An array of attributes that can be used on the element |
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| slots | slotsInfo[] | | An array of slots that can be used for the element (100% compiled out) |
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| cssprops | cssPropsInfo[] | | An array of CSS properties that are relevant to the component |
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| cssparts | cssPartsInfo[] | | An array of CSS parts that can be used for the element (100% compiled out) |
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| args | argsInfo[] | | An array of Glimmer arguments used for the component (100% compiled out) |
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## Exports
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### custom
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| Attribute | Type | Description |
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| :--------- | :------- | :---------------------------------------------------------------------------------- |
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| connect | function | A did-insert-able callback for tagging an element to be used for the custom element |
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| disconnect | function | A will-destroy-able callback for destroying an element used for the custom element |
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### element
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| Attribute | Type | Description |
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| :--------- | :------- | :------------------------------------------------------------------------------- |
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| attributes | object | An object containing a reference to all the custom elements' observed properties |
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| * | | All other properties proxy through to the CustomElements class |
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