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astro/packages/integrations/lit/client-shim.js
2023-02-01 13:46:50 +00:00

22 lines
531 B
JavaScript

async function polyfill() {
const { hydrateShadowRoots } = await import(
'@webcomponents/template-shadowroot/template-shadowroot.js'
);
window.addEventListener('DOMContentLoaded', () => hydrateShadowRoots(document.body), {
once: true,
});
}
const polyfillCheckEl = new DOMParser()
.parseFromString(
`<p><template shadowroot="open" shadowrootmode="open"></template></p>`,
'text/html',
{
includeShadowRoots: true,
}
)
.querySelector('p');
if (!polyfillCheckEl || !polyfillCheckEl.shadowRoot) {
polyfill();
}