How to use angular4 shared component communication
This time I will show you how to use angular4 shared component communication, and what are the precautions for using angular4 shared component communication. The following is a practical case, let's take a look.
Application scenario: operate the same set of data in different components. No matter which component operates on the data, the effect will be seen immediately in other components. In this way, they have to share a service instance, which is the focus of this article. If they are different instances, they will not operate on the same set of data, so there will not be such an effect. If you want to realize a shared service instance, you need to priviates in all parent components. This component is introduced in :[] and does not need to be introduced again in the sub-component, then they all use the service instance in the parent component.
1. Public service
import {Injectable} from "@angular/core";
@Injectable()
export class CommonService {
public dateList: any = [
{
name: "张旭超",
age: 20,
address: "北京市朝阳区"
}
];
constructor() {
}
addDateFun(data) {
this.dateList.push(data);
}
}2. parent.component.ts
import {Component, OnInit} from "@angular/core";
import {CommonService} from "./common.service";
// 这里要通过父子公用服务来操作数据，只需要在父组件中引入服务。
@Component({
selector: "parent-tag",
templateUrl: "parent.component.html",
providers: [
CommonService
]
})
export class ParentComponent implements OnInit {
public list: any = [];
constructor(private commonService: CommonService) {
this.list = commonService.dateList;
}
ngOnInit() {
}
}3. parent.component.html
<table width="500">
<tr *ngFor="let item of list">
<td>
{{item.name}}
</td>
<td>
{{item.age}}
</td>
<td>
{{item.address}}
</td>
</tr>
</table>
<child-one-tag></child-one-tag>4. child-one .component.ts
import {Component} from "@angular/core";
import {CommonService} from "./common.service";
@Component({
selector: "child-one-tag",
templateUrl: "child-one.component.html"
})
export class ChildOneComponent {
public display: boolean = false;
public username: string = "";
public age: number = 20;
public address: string = "";
constructor(public commonService: CommonService) {
}
showDialog() {
this.display = true;
}
hideDialog() {
this.display = false;
}
addInfoFun() {
let params = {
name: this.username,
age: this.age,
address: this.address
};
this.commonService.addDateFun(params);
params = {};
}
}5、child-one.component.html
<p-dialog header="弹窗" [(visible)]="display" [width]="300" appendTo="body" modal="modal"> <form #myForm="ngForm" name="myForm"> <p>姓名：<input type="text" name="username" [(ngModel)]="username" pInputText/></p> <p>年龄：<input type="number" name="age" [(ngModel)]="age" pInputText/></p> <p>地址：<input type="text" name="address" [(ngModel)]="address" pInputText/></p> <button pButton label="确定" type="submit" (click)="addInfoFun()"></button> <button pButton label="取消" (click)="hideDialog()"></button> </form> </p-dialog> <button label="添加" pButton (click)="showDialog()"></button>
I believe you have mastered the method after reading the case in this article, and there are more exciting things Please pay attention to other related articles on php Chinese website!
Recommended reading:
vuejs project packaging optimization
##Use postman json springmvc to make batch additions
The above is the detailed content of How to use angular4 shared component communication. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What should I do if I encounter garbled code printing for front-end thermal paper receipts?
Apr 04, 2025 pm 02:42 PM
Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...
Demystifying JavaScript: What It Does and Why It Matters
Apr 09, 2025 am 12:07 AM
JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.
Who gets paid more Python or JavaScript?
Apr 04, 2025 am 12:09 AM
There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.
How to merge array elements with the same ID into one object using JavaScript?
Apr 04, 2025 pm 05:09 PM
How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...
Is JavaScript hard to learn?
Apr 03, 2025 am 12:20 AM
Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.
How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website?
Apr 04, 2025 pm 05:36 PM
Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...
The difference in console.log output result: Why are the two calls different?
Apr 04, 2025 pm 05:12 PM
In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...
How to implement panel drag and drop adjustment function similar to VSCode in front-end development?
Apr 04, 2025 pm 02:06 PM
Explore the implementation of panel drag and drop adjustment function similar to VSCode in the front-end. In front-end development, how to implement VSCode similar to VSCode...
