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removes injected HTML codes from browser extensions for react hydration
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| import { RemixBrowser } from '@remix-run/react' | |
| import { startTransition, StrictMode } from 'react' | |
| import { hydrateRoot } from 'react-dom/client' | |
| function clearBrowserExtensionInjectionsBeforeHydration() { | |
| document | |
| .querySelectorAll( | |
| [ | |
| 'html > *:not(body, head)', | |
| 'script[src*="extension://"]', | |
| 'link[href*="extension://"]', | |
| ].join(', ') | |
| ) | |
| .forEach((s) => { | |
| s.parentNode?.removeChild(s) | |
| }) | |
| const $targets = { | |
| html: { | |
| $elm: document.querySelector('html')!, | |
| allowedAttributes: ['lang', 'dir', 'class'], | |
| }, | |
| head: { | |
| $elm: document.querySelector('head')!, | |
| allowedAttributes: [''], | |
| }, | |
| body: { | |
| $elm: document.querySelector('body')!, | |
| allowedAttributes: ['class'], | |
| }, | |
| } | |
| Object.entries($targets).forEach(([targetName, target]) => { | |
| target.$elm.getAttributeNames().forEach((attr) => { | |
| if (!target.allowedAttributes.includes(attr)) { | |
| target.$elm.removeAttribute(attr) | |
| } | |
| }) | |
| }) | |
| } | |
| function hydrate() { | |
| clearBrowserExtensionInjectionsBeforeHydration() | |
| startTransition(() => { | |
| hydrateRoot( | |
| document, | |
| <StrictMode> | |
| <RemixBrowser /> | |
| </StrictMode> | |
| ) | |
| }) | |
| } | |
| if (window.requestIdleCallback) { | |
| window.requestIdleCallback(hydrate) | |
| } else { | |
| // Safari doesn't support requestIdleCallback | |
| // https://caniuse.com/requestidlecallback | |
| window.setTimeout(hydrate, 1) | |
| } |
remix-run/remix#4822 (comment)
<script
dangerouslySetInnerHTML={{
__html: `
const observerConfig = {
childList: true,
subtree: true,
attributes: true,
attributeOldValue: true,
characterData: true,
characterDataOldValue: true,
};
window.hydration_observer = new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
switch (mutation.type) {
case 'childList': {
window.hydration_observer.disconnect();
mutation.addedNodes.forEach((node) => {
try {
mutation.target.removeChild(node);
} catch (e) {
console.error(e);
}
});
window.hydration_observer.observe(document, observerConfig);
break;
}
case 'attributes': {
mutation.target.removeAttribute(mutation.attributeName);
break;
}
}
});
});
window.addEventListener('DOMContentLoaded', () => {
window.hydration_observer.observe(document, observerConfig);
});
`,
}}
/>hydrateRoot(
document,
<Provider>
</StrictMode>
</Provider>,
);
window.hydration_observer.disconnect();
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remix-run/remix#4822 (comment)
https://twitter.com/franklinjavier/status/1718023190859960466