next/dist/esm/next-devtools/shared/react-18-hydration-error.js

The React Framework

import isError from '../../lib/is-error';
export function isHydrationError(error) {
    return isError(error) && (error.message === 'Hydration failed because the initial UI does not match what was rendered on the server.' || error.message === 'Text content does not match server-rendered HTML.');
}
export function isHydrationWarning(message) {
    return isHtmlTagsWarning(message) || isTextInTagsMismatchWarning(message) || isTextWarning(message);
}
// https://github.com/facebook/react/blob/main/packages/react-dom/src/__tests__/ReactDOMHydrationDiff-test.js used as a reference
const htmlTagsWarnings = new Set([
    'Warning: Expected server HTML to contain a matching <%s> in <%s>.%s',
    'Warning: Did not expect server HTML to contain a <%s> in <%s>.%s'
]);
const textAndTagsMismatchWarnings = new Set([
    'Warning: Expected server HTML to contain a matching text node for "%s" in <%s>.%s',
    'Warning: Did not expect server HTML to contain the text node "%s" in <%s>.%s'
]);
const textWarnings = new Set([
    'Warning: Text content did not match. Server: "%s" Client: "%s"%s'
]);
export const getHydrationWarningType = (message)=>{
    if (typeof message !== 'string') {
        // TODO: Doesn't make sense to treat no message as a hydration error message.
        // We should bail out somewhere earlier.
        return 'text';
    }
    const normalizedMessage = message.startsWith('Warning: ') ? message : "Warning: " + message;
    if (isHtmlTagsWarning(normalizedMessage)) return 'tag';
    if (isTextInTagsMismatchWarning(normalizedMessage)) return 'text-in-tag';
    return 'text';
};
const isHtmlTagsWarning = (message)=>typeof message === 'string' && htmlTagsWarnings.has(message);
const isTextInTagsMismatchWarning = (msg)=>typeof msg === 'string' && textAndTagsMismatchWarnings.has(msg);
const isTextWarning = (msg)=>typeof msg === 'string' && textWarnings.has(msg);

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