Edit: fetch-error.js
'use strict' /** * fetch-error.js * * FetchError interface for operational errors */ /** * Create FetchError instance * * @param String message Error message for human * @param String type Error type for machine * @param String systemError For Node.js system error * @return FetchError */ module.exports = FetchError function FetchError (message, type, systemError) { Error.call(this, message) this.message = message this.type = type // when err.type is `system`, err.code contains system error code if (systemError) { this.code = this.errno = systemError.code } // hide custom error implementation details from end-users Error.captureStackTrace(this, this.constructor) } FetchError.prototype = Object.create(Error.prototype) FetchError.prototype.constructor = FetchError FetchError.prototype.name = 'FetchError'
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