12 lines
740 B
TypeScript
12 lines
740 B
TypeScript
// The card renders a few elements that give their shadow root a registry of its
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// own (`ScopedRegistryHost` from `@lit-labs/scoped-registry-mixin`, used by the
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// media filter and the select). That is not something a browser can do
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// natively: it needs this polyfill, which Home Assistant loads for the whole
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// frontend. Without it, rendering one of those elements throws "importNode is
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// not a function" as Lit tries to clone a template into a registry that has no
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// document behind it.
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//
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// It replaces `customElements` and `attachShadow`, so it has to be the first
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// thing the page runs -- hence its own setup file, ahead of every other.
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import '@webcomponents/scoped-custom-element-registry/scoped-custom-element-registry.min';
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