57a87050e7
* JSON.stringify generic errors * Add util for normalizing errors * lint-fix * Add better error for null case as well Co-authored-by: Michael Ozeryansky <mozeryansky@users.noreply.github.com>
41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
import { isPlainObject } from './is-plain-object'
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// We allow some additional attached properties for Errors
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export interface NextError extends Error {
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type?: string
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page?: string
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code?: string | number
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cancelled?: boolean
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}
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export default function isError(err: unknown): err is NextError {
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return (
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typeof err === 'object' && err !== null && 'name' in err && 'message' in err
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)
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}
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export function getProperError(err: unknown): Error {
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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 new Error(
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'An undefined error was thrown, ' +
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'see here for more info: https://nextjs.org/docs/messages/threw-undefined'
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)
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}
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if (err === null) {
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return new Error(
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'A null error was thrown, ' +
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'see here for more info: https://nextjs.org/docs/messages/threw-undefined'
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)
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}
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}
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return new Error(isPlainObject(err) ? JSON.stringify(err) : err + '')
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}
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