1. 解释错误消息 "class constructor cannot called without 'new'" 的含义 这个错误消息表明你尝试直接调用了类的构造函数(即类名后跟圆括号的方式),但没有使用 new 关键字。在JavaScript(以及许多其他面向对象编程语言)中,类的构造函数是用于创建新对象实例的特殊函数。因此,必须使用 new 关键字来正确地调用构造函...
bupafengyu1楼•5 个月前作者
有一个class A,SubA继承A,但是控制台报错Class constructor xxx cannot be invoked without 'new'该如何解决? //A的创建 class A{ constructor() {} }; export default A //A的继承 import A from 'xxx' class SubA extends A{ constructor() { super(); } }; export default SubA //类的实例使用 ...
有一个class A,SubA继承A,但是控制台报错Class constructor xxx cannot be invoked without 'new'该如何解决? //A的创建 class A{ constructor() {} }; export default A //A的继承 import A from 'xxx' class SubA extends A{ constructor() { super(); } }; export default SubA //类的实例使用 i...
出现Class constructor Entity cannot be invoked without 'new'。 应该是babel转化的时候出问题了。 修改.babelrc文件 改为: 1 2 3 4 5 6 { "presets": [ ["env", {"modules":false,"targets":{"node":"current"}}], "stage-3" ] }
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bug:今天项目重新安装依赖打包的时候出现错误: Class constructor FileManager cannot be invoked without 'new' 解决:尝试了很多种解决方案,锁定有效解决方案 1. 修改package.json 里面的:"less": "^3.9.0"为"less": "~3.9.0" 2. 删除node_modules,然后重新安装打包,成功打包...
class Person { constructor(public first: string, public last: string) { this.first = first; this.last = last; } getName() { return `${this.first} ${this.last}`; } } // ⛔️ TypeError: Class constructor Person cannot be invoked without 'new' // ⛔️ Value of type 'typeof...
Upon inspection of the console logs, I have observed that the loading process occurs in the correct order until the my-app component is loaded. At this point, I encounter the following error: “Uncaught TypeError: Class constructor <component-name> cannot be invoked without ‘new'”....
有一个class A,SubA继承A,但是控制台报错Class constructor xxx cannot be invoked without 'new'该如何解决? //A的创建 class A{ constructor() {} }; export default A //A的继承 import A from 'xxx' class SubA extends A{ constructor() { super(); } }; export default SubA //类的实例使用...