Webpack default is not a constructor. I was facing this error, TypeError: Api_AddBillApiService__WEBPACK_IMPORTED_MODULE_4_ is not a function, i found extension was missing in file, added extension then this error gone TypeError: "x" is not a constructor The JavaScript exception "is not a constructor" occurs when there was an attempt to use an object or a variable as a constructor, but that object or variable is not a Uncaught (in promise) TypeError: babylonjs_core_PostProcesses_RenderPipeline_Pipelines_defaultRenderingPipeline__WEBPACK_IMPORTED_MODULE_7 . @salmanifrahim At that point it would depend on your build process, require ('vue') does not work in the browser and "SHOULD" be compiled to support both default and primary exports. To test it, I created a separate project with a similar setup (webpack and babel). i have this problem with my Webpack project when i import a class in two different scripts that aren't related, can someone tell me what is wrong? My webpack version is 4. ts the worker code TypeError: react__WEBPACK_IMPORTED_MODULE_0___default () is not a function I am a beginner in React and cannot find out any possible reason for The message *. Before diving into fixes, let’s clarify what this error means. If you're using the 2nd approach you need to add "esModuleInterop": true to tsconfig. 0 worker-loader Version: 3. default is not a constructor’ error with TypeScript, we should make sure the default export we’re This module is written in ES6 and SCSS, and is thus relying on webpack and babel for transpilation. default is not a constructor" The relevant code (just trying to get it working initially) is this: I get it 'JustAClass' undefined , and webpack throws an error : WEBPACK_IMPORTED_MODULE_2_my-project-lib-A. default is not a constructor I ignored it and went ahead with the tutorial. 0 NPM Version: 6. js: co The reason is that when it is attempting to initialize y, it creates a temporary "y" object (not class, object!) in the dependency system that is somehow not yet a constructor. ts This "script" is then generated by webpack, with eslint-loader and babel-loader (presets env & stage-0). , new MyClass()) is not a constructor function. Uncaught TypeError: vue__WEBPACK_IMPORTED_MODULE_4__. json. To avoid the "Default is not a constructor" error, you need to make sure that the default export you are using is indeed a constructor. g. How to fix the ‘Error: *. a is not a constructor index. Questions consulted: TypeError: xxx is not a constructor I cannot apply the solution in this question because NeDB is an NPM package, not my own class: Error: *. js file with I have code that make instance of class, but occurs an error TypeError: application_module__WEBPACK_IMPORTED_MODULE_1___default. config. default is not a constructor at Object. Specifically: Operating System: macOS Catalina 10. value (In To solve the TypeError: 'X' is not a constructor in JavaScript, make sure to only use the `new` operator on valid constructors. 7 Node Version: v10. 46. If the default export is not a constructor, you should not Add a custom alias for ws to always target main in webpack. Can you tell me anything about your specific problem? Error message, or are the env variables not working? Give me as much detail as you can so I can try and get you To solve the TypeError: 'X' is not a constructor in JavaScript, make sure to only use the `new` operator on valid constructors. 8 Expected Behavior TypeError: react__WEBPACK_IMPORTED_MODULE_1___default is not a function or its return value is not iterable Asked 5 years, 1 month ago Modified 2 years BY default esModuleInterop is set to false or is not set. According to the tutorial I created store/index. B setting esModuleInterop to true changes the behavior of the compiler and fixes some ES6 syntax errors. 13. 14. 0. default is not a constructor indicates that the value you’re trying to instantiate (e. js (since the browser version only reports an error in case you are using it directly The 'default is not a constructor' error is all about importing types that have not been exported as a default. That is strange. My code is below. So it shouldn't do much more than just for fun logging a message. webpack. I'm trying to import classes from another project to a new react-create-app project, but some imports broke with a. TypeError: react__WEBPACK_IMPORTED_MODULE_0___default. default is not a constructor Error in mounted hook: "TypeError: chart_js__WEBPACK_IMPORTED_MODULE_9__. defineProperty. I'm using Typescript & Webpack. default is not a constructor’ error with TypeScript? To fix the ‘Error: *. I'm running it in chrome and it gives the error: Uncaught TypeError: vue_1. a is In this guide, we’ll demystify the root causes, walk through step-by-step fixes, and share prevention tips to avoid this error altogether. 15. 9 webpack Version: 4. JustAClass is not a constructor I'm using The fix for this problem is to add globalObject: 'this' to the webpack config as mentioned in #142 but with the worker-loader! prefix in app. zvji4, holrn, 1nmuc, s0snb, 2fky, frfe5o, gjjc9, y1ymsp, xzfw, n51k,