TypeError: Class extends value undefined is not a constructor or null 这个错误通常出现在JavaScript或TypeScript编程中,尤其是在使用ES6+的类继承特性时。这个错误表明你尝试从一个未定义(undefined)的值继承一个类。以下是一些可能导致这个错误的常见原因以及相应的解决方案: 1. 理解错误含义 这个错误表明你尝试继...
在执行npm run build的时候遇到了错误:TypeError: Class extends value undefined is not a constructor or null;而执行npm run serve是可以正常执行的,报错如下: buildingforproduction... ERROR TypeError:Classextends value undefinedisnotaconstructorornullTypeError:Classextends value undefinedisnotaconstructorornull...
PhantomJS 2.1.1 (Windows 8 0.0.0) Service: breadcrumbService should return breadcrumb label in json format FAILED TypeError: undefined is not a constructor (evaluating '$location.path().toLowerCase().endsWith('/edit')') in app/scripts/app.js (line 44) app/scripts/app.js:44:72 $broadcas...
报错TypeError: Class extends value undefined is not a constructor or nul 在执行npm run build的时候遇到了错误:TypeError: Class extends value undefined is not a constructor or null;而执行npm run serve是可以正常执行的,报错如下: Buildingforproduction... ERROR TypeError: Class extends value undefinedis...
selenium.common.exceptions.WebDriverException: Message: TypeError - undefined is not a constructor (evaluating '_getTagName(currWindow).toLowerCase()') Steps to reproduce - Background: OS X El capitan locally, heroku on the web. Python 3.4 in venv. Error throws for both. I'm using the Sele...
Issue description or question I get this TypeError: 'undefined' is not a constructor (evaluating 'new exports.Map()') error when I start up wallaby. Full error: TypeError: 'undefined' is not a constructor (evaluating 'new exports.Map()')...
在执行npm run build的时候遇到了错误:TypeError: Class extends value undefined is not a constructor or null;而执行npm run serve是可以正常执行的,报错如下: Building for production... ERROR TypeError: Class extends value undefined is not a constructor or null ...
TypeError: Class extends value undefined is not a constructor or null 解决方案 rm -rf node_modules rm -f package-lock.json npm install -legacy-peer-deps npm run build 甘井子区电小六互联网服务工作室(个体工商户) 辽ICP备2024029468号-1 -2 -3 | Powered by Wiki.js...
var Car = 1; new Car(); // TypeError: Car is not a constructor new Math(); // TypeError: Math is not a constructor new Symbol(); // TypeError: Symbol is not a constructor function* f() {}; var obj = new f; // TypeError: f is not a constructor ...
Current typescript project does not work, it would be really cool if it did. player.js is incompatible with Typescript at the moment or vice versa. Actual Behavior Crashes on runtime with error: Uncaught (in promise): TypeError: undefined is not a constructor (evaluating 'newWEBPACK_IMPORTED...