Error.prototype Javascript
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日本語 (ja) 한국어 (ko) Polski (pl) Русский (ru) 中文 (简体) (zh-CN) Add a translation Edit Advanced Advanced History Print this article MDN Web technology For developers JavaScript JavaScript reference Standard built-in objects Error Error.prototype Your Search Results fscholz Mingun diegogaysaez lydell Sheppy ethertank teoli Potappo how to fix iphone error -1 Sevenspade Chris Chittleborough Vor0nwe Ynvich Error.prototype In This Article DescriptionPropertiesStandard propertiesVendor-specific extensionsMicrosoftMozillaMethodsSpecificationsBrowser compatibilitySee also The Error.prototype property represents the prototype for the Error constructor. Property attributes of Error.prototype Writable no Enumerable no Configurable no Description All Error instances and instances of non-generic errors inherit from Error.prototype. As with all constructor functions, you can use the prototype of the constructor to add properties or methods to all instances created with that constructor. Properties Standard properties Error.prototype.constructor Specifies the function that created an instance's prototype. Error.prototype.message Error message. Error.prototype.name Error name. Vendor-specific extensions Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may chan
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Firefox WebExtensions Developer ToolsFeedback Get Firefox help Get web development help error -505 google play Join the MDN community Report a content problem Report a bug Search Search Languages Català (ca) error -1 iphone Deutsch (de) Español (es) Français (fr) Bahasa Indonesia (id) 日本語 (ja) 한국어 (ko) Polski (pl) Português (do Brasil) (pt-BR) Русский (ru) 中文 (简体) (zh-CN) 正體中文 (繁體) (zh-TW) Add https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/prototype 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 teoli davidbourguignon secoif DomenicDenicola dgchurchill timemachine3030 Sevenspade Potappo Sephr Brettz9 Mgjbot Allanbonadio Ptak82 JustinLudwig Error In https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error 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. This page documents the use of the Error object itself and its use as a constructor function. For a list of properties and methods inherited by Error instances, see Error.prototype. Error types Besides
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the http://stackoverflow.com/questions/8802845/inheriting-from-the-error-object-where-is-the-message-property company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 http://magento.stackexchange.com/questions/7682/error-in-prototype-js million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Inheriting from the Error object - where is the message property? up vote 30 down vote favorite 10 I noticed error -1 a strange behavior while defining custom error objects in Javascript: function MyError(msg) { Error.call(this, msg); this.name = "MyError"; } MyError.prototype.__proto__ = Error.prototype; var error = new Error("message"); error.message; // "message" var myError = new MyError("message"); myError instanceof Error; // true myError.message; // "" ! Why does new Error("message") set the message property, while Error.call(this, msg); does not? Sure, I can just define this.message = msg in the MyError constructor, but I don't quite javascript error object understand why it is not already set in the first place. javascript share|improve this question asked Jan 10 '12 at 11:52 Philippe Plantier 3,17711532 add a comment| 5 Answers 5 active oldest votes up vote 31 down vote accepted A. Like, Raynos said, The reason message isn't being set is that Error is a function that returns a new Error object and does not manipulate this in any way. B. The way to do this right is to set the result of the apply from the constructor on this, as well as setting the prototype in the usual complicated javascripty way: function MyError() { var tmp = Error.apply(this, arguments) tmp.name = this.name = 'MyError' this.message = tmp.message // instead of this.stack = ..., a getter for more optimizy goodness Object.defineProperty(this, 'stack', { get: function () { return tmp.stack } }) return this } var IntermediateInheritor = function () {} IntermediateInheritor.prototype = Error.prototype MyError.prototype = new IntermediateInheritor() var myError = new MyError("message") console.log("The message is: '"+myError.message+"'") // The message is: 'message' console.log(myError instanceof Error) // true console.log(myError instanceof MyError) // true console.log(myError.toString()) // MyError: message console.log(myError.stack) // MyError: message \n //
a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Magento Questions Tags Users Badges Unanswered Ask Question _ Magento Stack Exchange is a question and answer site for users of the Magento e-Commerce platform. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Error in Prototype.js up vote 3 down vote favorite 1 I'm using the HelloResponsive EE theme on a Magento 1.13 EE deployment. In setting up an extention for the eWAY gateway, I was told there was an error in the Prototype.js file that was interfering with the JSON post. Uncaught TypeError: Object.keys called on non-object prototype.js:126 addMethods prototype.js:126 create prototype.js:115 (anonymous function) wishlist.js:38 for (var i = 0, length = properties.length; i < length; i++) klass.addMethods(properties[i]); The custom theme does use JQuery as well, so this may be a conflict issue. But when I try moving the JQuery call before the Prototype call, the JQuery functions stop working. Can anyone help explain whether or not the error is related to the Prototype / JQuery conflict (I am using a noConflict script) and how best to fix this? Here's the code in Wishlist.js, starting at line 38: Enterprise.Wishlist.Widget.Form = Class.create(Enterprise.Widget, { action: null, isValid: false, initialize: function($super, action) { var _templateString = '
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