50 lines
1.9 KiB
JavaScript
50 lines
1.9 KiB
JavaScript
import { isPlainObject } from '../shared/lib/is-plain-object';
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/**
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* Checks whether the given value is a NextError.
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* This can be used to print a more detailed error message with properties like `code` & `digest`.
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*/ export default function isError(err) {
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return typeof err === 'object' && err !== null && 'name' in err && 'message' in err;
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}
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function safeStringify(obj) {
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const seen = new WeakSet();
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return JSON.stringify(obj, (_key, value)=>{
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// If value is an object and already seen, replace with "[Circular]"
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if (typeof value === 'object' && value !== null) {
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if (seen.has(value)) {
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return '[Circular]';
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}
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seen.add(value);
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}
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return value;
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});
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}
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export function getProperError(err) {
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if (isError(err)) {
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return err;
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}
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if (process.env.NODE_ENV === 'development') {
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// provide better error for case where `throw undefined`
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// is called in development
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if (typeof err === 'undefined') {
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return Object.defineProperty(new Error('An undefined error was thrown, ' + 'see here for more info: https://nextjs.org/docs/messages/threw-undefined'), "__NEXT_ERROR_CODE", {
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value: "E98",
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enumerable: false,
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configurable: true
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});
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}
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if (err === null) {
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return Object.defineProperty(new Error('A null error was thrown, ' + 'see here for more info: https://nextjs.org/docs/messages/threw-undefined'), "__NEXT_ERROR_CODE", {
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value: "E336",
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enumerable: false,
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configurable: true
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});
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}
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}
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return Object.defineProperty(new Error(isPlainObject(err) ? safeStringify(err) : err + ''), "__NEXT_ERROR_CODE", {
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value: "E394",
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enumerable: false,
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configurable: true
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});
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}
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//# sourceMappingURL=is-error.js.map
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