Angular Todo App 3

Source: Internet
Author: User
Tags export class

Isolate business logic

Next to the previous section, the business logic should be vintage denim in a separate service, we build Todoservice in the Todo folder

Ng G S Todo/todo


Introducing UUID Packages

Todo ID to be unique, one is to use a self-growth sequence, one is a randomly generated set of impossible to repeat a sequence of characters, the common is the UUID

NPM Install--save Angular2-uuid

Installation succeeded:

Modify ID Type
Export class Todo {    id:string;    desc:string;    Completed:boolean;}


Modify Service
Import {injectable} from ' @angular/core ', import {Todo} from './todo.model ', import {UUID} from ' Angular2-uuid '; @Injec Table () Export class Todoservice {  todos:todo[]=[];  Addtodo (todoitem:string): todo[]{let    todo={      id:uuid. UUID (),      Desc:todoitem,      completed:false    };    This.todos.push (TODO);    return this.todos;  }  Constructor () {}}


Component Injection Dependent service
Import {Component, OnInit} from ' @angular/core '; import {Todo} from "./todo.model"; import {Todoservice} from "./todo. Service "; @Component ({  selector: ' App-todo ',  templateurl: './todo.component.html ',  styleurls: ['./ Todo.component.css '],  Providers:[todoservice]}) Export class Todocomponent implements OnInit {  todos:todo[]= [];  Desc= ";  Addtodo () {    This.todos=this.service.addtodo (THIS.DESC);    This.desc= ';  }  Constructor (private Service:todoservice) {}  Ngoninit () {  }}


Install plug-ins (optional)

To see the results clearly, we installed a plugin for Chrome, and entered in the Chrome address bar



Download a "Angury" plugin to install, then press F12 to bring up the developer tool with a Angury tab


Angular Todo App 3

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.