astro/packages/integrations/lit/server-shim.js
Elliott Marquez 4b077318fb
Update lit-ssr dependency (#6681)
* update lit-ssr dependency

* delete unnecessary lit shim checks

* delete another unused lit shim feature

* fix sass build

* bump lit and polyfill versions to match ssr req

* shim HTMLElement in test

* remove lit global shim workarounds

* re-shim Astro's ce.define

* remove fix window test and shim HTML Element

* Update .changeset/gold-windows-fly.md

Co-authored-by: Augustine Kim <ajk830@gmail.com>

* fix window check test

* implement suggestoins

---------

Co-authored-by: Augustine Kim <ajk830@gmail.com>
2023-03-29 12:43:40 -04:00

35 lines
1.6 KiB
JavaScript

import { customElements as litCE, HTMLElement as litShimHTMLElement } from '@lit-labs/ssr-dom-shim';
// Something at build time injects document.currentScript = undefined instead of
// document.currentScript = null. This causes Sass build to fail because it
// seems to be expecting `=== null`. This set to `undefined` doesn't seem to be
// caused by Lit and only happens at build / test time, but not in dev or
// preview time.
if (globalThis.document) {
document.currentScript = null;
}
if (globalThis.HTMLElement) {
// Seems Astro's Element shim does nothing when `.setAttribute` is called
// and subsequently `.getAttribute` is called. Causes Lit to not SSR attrs
globalThis.HTMLElement = litShimHTMLElement;
}
// Astro seems to have a DOM shim and the only real difference that we need out
// of the Lit DOM shim is that the Lit DOM shim reads
// `HTMLElement.observedAttributes` which is meant to trigger
// `ReactiveElement.finalize()`. So this is the only thing we will re-shim since
// Lit will try to respect other global DOM shims.
globalThis.customElements = litCE;
const litCeDefine = customElements.define;
// We need to patch customElements.define to keep track of the tagName on the
// class itself so that we can transform JSX custom element class definintion to
// a DSD string on the server, because there is no way to get the tagName from a
// CE class otherwise. Not an issue on client:only because the browser supports
// appending a class instance directly to the DOM.
customElements.define = function (tagName, Ctr) {
Ctr[Symbol.for('tagName')] = tagName;
return litCeDefine.call(this, tagName, Ctr);
};