Typeerror Cannot Redefine Property Defineproperty

Reload to refresh your session. Bear in mind that these options are not necessarily the descriptor's own properties, and properties inherited from the prototype chain will be considered too. As of August 2014, proxies only work in Firefox. For now, don't rely on redefining the length property of an array to either work, or to work in a particular manner.

You have to put configurable:true manually (I thought it is a default). Join them; it only takes a minute: Sign up Error in accessor property: can't redefine non-configurable property 'status' up vote 13 down vote favorite 1 I'm trying to define an object How do I deal with my current employer not respecting my decision to leave? var o = {}; Object.defineProperty(o, 'a', { get: function() { return 1; }, configurable: false }); Object.defineProperty(o, 'a', { configurable: true }); // throws a TypeError Object.defineProperty(o, 'a', { enumerable: true http://stackoverflow.com/questions/25517989/why-cant-i-redefine-a-property-in-a-javascript-object

Cannot Redefine Property Javascript

The error is related to how Lightning's Locker Service wraps html elements and permits or restricts certain operations on them. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed No mention of failure with defineProperty, just with Function#apply, Function#bind and enumerable properties on Error.

1. Return statements on a set are ignored.
2. Property descriptors present in objects come in two main flavors: data descriptors and accessor descriptors.
3. Like I said, I am intensively using Sinon.
4. Draft   Browser compatibility Desktop Mobile Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari Basic support 4.0 (2) 5 9 [1] 11.60 5.1 [2] Feature Firefox Mobile (Gecko) Android IE Mobile
5. With modern browsers and in node.js it is possible to restrict changes to an entire object in addition to restricting individual properties of an object via defineProperty.

Should I report it? Comment 3 by [email protected], Oct 12 2010 Processing Here's a simpler repro: var obj = { get value() {}, set value (v) { throw "Error"; } }; Object.defineProperty(obj, "value", { value: The previous example demonstrates that you have to remember that the expressions provided to any value in an Object.create property descriptor is evaluated when the property descriptor object is defined. Cannot Redefine Property Name Polyglot Anagrams Cops' Thread Professor Lewin: "Which string will break?" / Me: "That one." / Professor Lewin: "Wrong!" Vent kitchen hood vent to roof turbine vent?

If you add "configurable: true: to the property descriptor everything works as you expect. Cannot Redefine Property Sinon We recommend upgrading to the latest Safari, Google Chrome, or Firefox. Terms Privacy Security Status Help You can't perform that action at this time. node-config collaborator markstos commented Aug 15, 2016 Put another way, I don't see the current behavior as a regresion, I see it as triggering an unsupported case of trying to pass

Already have an account? Cannot Redefine Non-configurable Property 'reflect' You can create getters and setters on a prototype without an object literal using defineProperty. /** * @param {string} prefix * @constructor */ function Product(prefix) { /** * @private * @type speedskater reopened this Oct 2, 2015 srph commented Oct 3, 2015 Hmm, weird. It would be very strange to have an ES5 browser with this bug, though.

Cannot Redefine Property Sinon

Once an object has been sealed, you can no longer modify existing properties with defineProperty. And even when you can rely on it, there's really no good reason to do so. Cannot Redefine Property Javascript Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 10 Star 419 Fork 51 speedskater/babel-plugin-rewire Code Issues 15 Pull requests 0 Projects Cannot Redefine Non-configurable Property 'name' TIKZ: foreach not compatible with calc-library?

rpaterson commented Aug 15, 2016 Actually I take it back - JSON parse/stringify isn't a valid workaround for my case, because I'm actually expecting some of the objects passed to Config.util.extendDeep(...) Could you please provide a toy example or a PR with the sample, such that i can reproduce your error and provide a fix. You signed in with another tab or window. skylve commented Aug 3, 2016 Same error here. Uncaught Typeerror: Cannot Redefine Property:

Can be any valid JavaScript value (number, object, function, etc). current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Thank you! MathSciNet review alert?

Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 216 Star 5,376 Fork 713 es-shims/es5-shim Code Issues 32 Pull requests 7 Projects Object Defineproperties Another possibility is that var defineProperty = … is breaking - some old browsers have issues with naming a variable toString, for example. What happens is that the call to Object.defineProperty will make actually call the set accessor, which again will call Object.defineProperty, which again will call ........

rpaterson referenced this issue Jun 20, 2016 Open Add test for util.extendDeep(...) from a config #333 rpaterson commented Jun 20, 2016 Done.

The function will receive as only argument the new value being assigned to the property. How to reply? To overwrite, use simple assignment. Getownpropertydescriptor This issue was introduced in v1.21.0 and does not error in previous versions.

I will look at maps and sets,... This seems to occur around these lines: if (typeof module.exports === 'object' || typeof module.exports === 'function') { Object.defineProperty(module.exports, '__Rewire__', { 'value': __Rewire__, 'enumberable': false }); This is my webpack loader See also Enumerability and ownership of properties Object.defineProperties() Object.propertyIsEnumerable() Object.getOwnPropertyDescriptor() Object.prototype.watch() Object.prototype.unwatch() get set Object.create() Additional Object.defineProperty examples Reflect.defineProperty() Document Tags and Contributors Tags: ECMAScript5 JavaScript JavaScript 1.8.5 Method Object Contributors A descriptor must be one of these two flavors; it cannot be both.

share|improve this answer edited Aug 22 '11 at 7:44 answered Aug 22 '11 at 7:20 user123444555621 63.9k1685101 add a comment| Your Answer draft saved draft discarded Sign up or log But jQuery 2.2.4 is generating the "Cannot redefine property:title" error. Personally I find something like product.type = "apple"; console.log(product.type); a lot more readable and accessible than product.setType("apple"); console.log(product.type()); Although directly accessing and setting properties on instances still sets off my internal If there is no configuration values provided by the app via configuration files or via environment variables as specified by config/custom-environment-variables.json, config processes my defaults as given to CONFIG.util.extendDeep(...) & CONFIG.util.setModuleDefaults(...)

Reload to refresh your session. If you have any questions or corrections, pretty please let me know on Twitter, you can find me there as @bjorntipling. Assigning only part of a string to a variable in bash Professor Lewin: "Which string will break?" / Me: "That one." / Professor Lewin: "Wrong!" Vent kitchen hood vent to roof Usually reusing the value of an assignment would work, but you may have problems with a property that has a getter.

Bug? Calculating ...5(5+4(4+3(3+2(2+1(1))))) Isn't AES-NI useless because now the key length need to be longer?