Java Script Error Object
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Node Error Object
(pt-BR) Русский (ru) 中文 (简体) (zh-CN) 正體中文 (繁體) (zh-TW) Add a translation Edit Advanced Advanced History Print this article MDN Web technology For developers JavaScript JavaScript reference Standard built-in objects Error Your Search Results ariyankhan josephmcasey AlexanderFradiani fscholz mondwan SphinxKnight janosch-x davidchase Mingun shawnacscott Sheppy ethertank Nickolay evilpie trevorh javascript throw typeerror teoli davidbourguignon secoif DomenicDenicola dgchurchill timemachine3030 Sevenspade Potappo Sephr Brettz9 Mgjbot Allanbonadio Ptak82 JustinLudwig Error In This Article SyntaxParametersDescriptionError typesPropertiesMethodsError instancesPropertiesStandard propertiesVendor-specific extensionsMicrosoftMozillaMethodsExamplesThrowing a generic errorHandling a specific errorCustom Error TypesSpecificationsBrowser compatibilitySee also The Error constructor creates an error object. Instances of Error objects are thrown when runtime errors occur. The Error object can also be used as a base object for user-defined exceptions. See below for standard built-in error types. Syntax new Error([message[, fileName[, lineNumber]]]) Parameters message Optional. Human-readable description of the error. fileName Optional. The value for the fileName property on the created Error object. Defaults to the name of the file containing the code that called the Error() constructor. lineNumber Optional. The value for the lineNumber property on the created Error object. Defaults to the line number containing the Error() constructor invocation. Description Runtime errors result in new Error objects being created and thrown. T
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Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes nodejs throw error a minute: Sign up What is the difference between `throw new Error` and `throw someObject` in JavaScript? up vote 120 down vote favorite 28 I want to write a common error handler which will catch custom errors thrown on purpose https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error at any instance of the code. When I did throw new Error('sample') like in the following code try { throw new Error({'hehe':'haha'}); // throw new Error('hehe'); } catch(e) { alert(e); console.log(e); } Log shows in Firefox as Error: [object Object] and I couldn't parse the object. For the second throw the log shows as: Error: hehe Whereas when I did try { throw ({'hehe':'haha'}); } catch(e) { alert(e); console.log(e); } the console showed as: Object { hehe="haha"} in which I was able http://stackoverflow.com/questions/9156176/what-is-the-difference-between-throw-new-error-and-throw-someobject-in-javas to access the error properties. What is the difference? Is the difference as seen in the code? Like string will be just passed as string and object as objects but the syntax will be different? I haven't explored throwing error object... I had done only throwing strings. Is there any other way than the above two mentioned methods? javascript object error-handling exception-handling throw share|improve this question edited Jun 9 at 17:27 Bergi 218k19232375 asked Feb 6 '12 at 6:07 Jayapal Chandran 2,52984880 2 The problem with throw new Error({prop:val}) is that's not a valid construction of Error. Error has known properties as discussed by Hemant. –grantwparks May 14 '13 at 15:32 related: Throwing strings instead of Errors –Bergi Jun 9 at 17:28 add a comment| 3 Answers 3 active oldest votes up vote 93 down vote accepted here is a good explanation about The Error object and throwing your own errors The Error Object just what we can extract from it in an event of an error. The Error object in all browsers support the following two properties: name: The name of the error, or more specifically, the name of the constructor function the error belongs to. message: A description of the error, with this description varying depending on the browser. Six possible values can be returned by the name property, which as mentioned correspond to the names of the error's constructors. They are: Error Name Description EvalError
Query Strings Readline REPL Stream String Decoder Timers TLS/SSL TTY UDP/Datagram URL Utilities V8 VM ZLIB https://nodejs.org/api/errors.html GitHub Repo & Issue Tracker Mailing List Node.js v6.9.0 Documentation Index | View on single page | View as JSON Table of Contents Errors Error Propagation and Interception Node.js style callbacks Class: Error new Error(message) Error.captureStackTrace(targetObject[, constructorOpt]) Error.stackTraceLimit error.message error.stack Class: RangeError Class: ReferenceError Class: SyntaxError Class: TypeError Exceptions vs. Errors script error System Errors Class: System Error error.code error.errno error.syscall Common System Errors Errors# Applications running in Node.js will generally experience four categories of errors: Standard JavaScript errors such as: