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36 lines
963 B
TypeScript
36 lines
963 B
TypeScript
/**
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* Converts an unknown value to an Error instance.
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*
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* Handles various error formats commonly encountered in JavaScript:
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* - Error instances are returned as-is (re-wrapped)
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* - Strings become Error messages
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* - Other values are JSON-stringified into the Error message
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*
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* @param e - The unknown value to convert
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* @returns An Error instance representing the input
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*
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* @example
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* ```typescript
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* try {
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* await someOperation()
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* } catch (e) {
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* const error = asError(e)
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* console.error(error.message)
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* }
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*
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* // Works with any thrown value
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* asError(new Error('oops')) // Error: oops
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* asError('string error') // Error: string error
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* asError({ code: 500 }) // Error: {"code":500}
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* ```
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*/
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export const asError = (e: unknown) => {
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if (e instanceof Error) {
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return new Error(e as any)
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}
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if (typeof e === "string") {
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return new Error(`${e}`)
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}
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return new Error(`${JSON.stringify(e)}`)
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}
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