34 lines
943 B
JavaScript
34 lines
943 B
JavaScript
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const objectToString = Object.prototype.toString;
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const isError = value => objectToString.call(value) === '[object Error]';
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const errorMessages = new Set([
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'network error', // Chrome
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'Failed to fetch', // Chrome
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'NetworkError when attempting to fetch resource.', // Firefox
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'The Internet connection appears to be offline.', // Safari 16
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'Load failed', // Safari 17+
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'Network request failed', // `cross-fetch`
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'fetch failed', // Undici (Node.js)
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'terminated', // Undici (Node.js)
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]);
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export default function isNetworkError(error) {
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const isValid = error
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&& isError(error)
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&& error.name === 'TypeError'
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&& typeof error.message === 'string';
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if (!isValid) {
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return false;
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}
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// We do an extra check for Safari 17+ as it has a very generic error message.
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// Network errors in Safari have no stack.
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if (error.message === 'Load failed') {
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return error.stack === undefined;
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}
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return errorMessages.has(error.message);
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}
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