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fix attaching styles, check shadowroot #181

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fix attaching styles, check shadowroot #181

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24 changes: 16 additions & 8 deletions src/hooks/useStyleSheet.ts
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Original file line number Diff line number Diff line change
@@ -1,30 +1,38 @@
/* eslint-disable no-extra-boolean-cast */
import { RefObject } from "react";

import { useIsomorphicLayoutEffect } from "./useIsomorphicLayoutEffect";
import { getOwnerDocument } from "../utils/ownerDocument";
import { getNonce } from "../utils/nonce";

// Bundler is configured to load this as a processed minified CSS-string
import styles from "../css/styles.css";

const styleElementMap: Map<Document, HTMLStyleElement> = new Map();
const styleElementMap: Map<Document | ShadowRoot, HTMLStyleElement> = new Map();

/**
* Injects CSS code into the document's <head>
*/
export const useStyleSheet = (nodeRef: RefObject<HTMLDivElement>): void => {
useIsomorphicLayoutEffect(() => {
const parentDocument = nodeRef.current ? nodeRef.current.ownerDocument : document;

if (typeof parentDocument !== "undefined" && !styleElementMap.has(parentDocument)) {
const styleElement = parentDocument.createElement("style");
const ownerDocument = getOwnerDocument(nodeRef.current);
const parentDocument = ownerDocument || document;
if (
parentDocument &&
typeof parentDocument !== "undefined" &&
!styleElementMap.has(parentDocument)
) {
const styleElement = document.createElement("style");
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styleElement.innerHTML = styles;
styleElementMap.set(parentDocument, styleElement);

// Conform to CSP rules by setting `nonce` attribute to the inline styles
const nonce = getNonce();
if (nonce) styleElement.setAttribute("nonce", nonce);

parentDocument.head.appendChild(styleElement);
if (parentDocument instanceof ShadowRoot) {
parentDocument.appendChild(styleElement);
} else {
parentDocument.head.appendChild(styleElement);
}
}
}, []);
};
11 changes: 11 additions & 0 deletions src/utils/ownerDocument.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
export const getOwnerDocument = (node: HTMLElement | null): ShadowRoot | Document | null => {
let parent = node && node.parentNode;
const ownerDocument = node && node.ownerDocument;
while (parent) {
if (parent instanceof ShadowRoot) {
return parent;
}
parent = parent.parentNode;
}
return ownerDocument;
};