我一直在考虑在使用构建的快速应用程序中实现依赖项注入的想法。实际项目如下:
/controllers/myController.controller.js
import express from 'express';
import MyModel from '/models/myModel.model.js';
class MyController{
constructor(){
this.router = express.Router();
}
getAll(){
var modelInstance = new MyModel()
我正在尝试在react-testing-library中运行the example来测试react钩子。但它似乎在这一行失败了: testHook(() => ({count, increment} = useCounter({ initialCount: 2 }))) 看起来和巴别塔有关。我试着用谷歌搜索,但找不到任何似乎有同样问题的人。我在create-react-app上安装了webpack。 这是堆栈跟踪: ● Test suite failed to run
Can't convert node without a body
at NodePath.en
我已经在我的Angular项目中安装了typescript-collection包,以使用Dictionary类型。我想保存所有来自社交媒体的最新帖子在字典中与发布的图像的日期。在这之后,我想把所有的字典合并成一个字典。 let TwitterPosts = this.getLatestTwitterPosts();
let InstagramPosts = this.getLatestInstagramPosts();
let FacebookPosts = this.getLatestsFacebookPosts(); getLateststypePosts-方法如下所示: const
使用#语法,我们现在能够在类中创建私有属性,如下所示:
class Person {
#name;
constructor(name) {
this.#name = name;
}
getName() { return this.#name; }
}
let ron = new Person('ron')
ron.#name // undefined
ron.getName(); // ron
以前,在ES5中,私有财产很难通过以下方式被“伪造”:
function Person(name) {
var name = nam
堆栈跟踪没有指向问题的根源:
Objects are not valid as a React child (found: [object Promise]). If you meant to render a collection of children, use an array instead.
in Route (at App.js:84)
in Switch (at App.js:78)
...
。
这说明:
App.js:84
<Route path="/callback" render={props => this.onRouteToC