我的项目结构:
app.component.ts:
import { Component } from "@angular/core"
import { Todo } from './components/shared/todo.model'
import { todos } from "./components/shared/todo.data"
import {TodoService} from "./components/shared/todoService"
import {TodoService} from "./components/shared/todoService";
@Component({
moduleId: module.id,
selector: "app",
templateUrl: "app.component.html",
styleUrls: ['app.component.css'],
providers: [TodoService]
})
export class AppComponent {
title:string = "Angular 2Do";
}
todo-form.component.ts:
import {Component, Output, EventEmitter} from "@angular/core";
import {Todo} from "../shared/todo.model";
import {TodoService} from "../shared/todoService"
@Component({
moduleId: module.id,
selector: "todo-form",
templateUrl: "todo-form.component.html",
styleUrls: ["todo-form.component.css"],
})
export class TodoForm {
...
constructor(private todoService:TodoService) {
console.log(this.todoService);
this.todoService.order = 2;
console.log( this.todoService);
}
}
todo-list.component.ts:
import {Component, Input, OnInit} from "@angular/core"
import { ITodo } from "../shared/todo.model"
import { TodoService } from "../shared/todoService"
@Component({
moduleId: module.id,
selector: "todo-list",
templateUrl: "todo-list.component.html",
styleUrls: ["todo-list.component.css"],
})
export class TodoListComponent implements OnInit {
todos:ITodo[];
...
constructor(private todoService:TodoService) {
...
console.log(this.todoService);
this.todoService.order=1;
console.log(this.todoService);
}
...
}
app
是 list
和 form
组件的父级
当我启动我在控制台中看到的应用程序时:
但如果展开所有我看到的:
哪个结果是实际的,为什么在第二个 View 中我看到 1
而在另一个 View 中看到 2
。
最佳答案
console.log 的“+”按钮只能显示对象的当前状态,不能显示对象在调用时的快照。
参见 console.log() async or sync?以获得更深入的解释。
所以 order: 1, 是对象的最终状态。
关于javascript - angular 2服务注入(inject)问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41160538/