How to implement component interaction in Angular2
This article mainly introduces the method of realizing component interaction in Angular2, and summarizes and analyzes the relevant operating skills and precautions for component interaction in Angular2 in the form of examples. Friends in need can refer to the following
The examples in this article describe Angular2's method of implementing component interaction. Share it with everyone for your reference, the details are as follows:
Preface
In Angular development, we often involve the interaction between components , for example, referencing components developed by our own department
Sometimes, we need to bind some data to the referenced component, or we need the referenced subcomponent to output some data
At this time, we need to handle the relationship between the components Interaction between
Key code for component interaction
Bind data from parent component to child component
Subcomponent
<h3>{{hero.name}} says:</h3> @Input() hero: Hero;
Parent component
<hero-child [hero]="myhero" ></hero-child> myhero = "Mr.IQ";
The @Input of the subcomponent here indicates that it needs the entity hero. Later, when the parent component introduces the subcomponent, it must be written in the subcomponent tag. Enter hero, and assign a value to hero in your own component to bind the parent component data to the child component
The parent component listens to the events of the child component
The child component
<button (click)="vote(true)" >Agree</button> @Output() onVoted = new EventEmitter<boolean>(); vote(agreed: boolean) { this.onVoted.emit(agreed);}
Parent component
<my-voter (myonVoted)="onVoted($event)"></my-voter> myonVoted(agreed: boolean) { agreed ? this.agreed++ : this.disagreed++; }
The @Output of the child component indicates that it will use the onVoted method to pass a boolean value to the parent component. After the parent component introduces the child component, it binds the child component's method By going to your own method, you can achieve the effect of monitoring sub-components
setter intercepts changes in input attribute values
Sub-component
<h3>"{{name}}"</h3> private _name = ''; @Input() set name(name: string) { this._name = (name && name.trim()) || '<no name set>'; } get name(): string { return this._name; }
Parent Component
<name-child [name]="myname"></name-child>
After the parent component references the child component, it binds data to the child component. The child component modifies and displays the data passed by the parent component through set and get
The parent component and Subcomponents interact through local variables
Subcomponent
seconds = 11; stop() { this.message = `Holding at T-${this.seconds} seconds`; }
Parent component
<button (click)="timer.stop()">Stop</button> <p class="seconds">{{timer.seconds}}</p> <countdown-timer #timer></countdown-timer>
The subcomponent defines variables and methods. After the parent component refers to the subcomponent tag, pass Create a local variable in the label to represent the sub-component, and then use the variable to access the variables and methods of the sub-component
The above is what I have compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
How to implement orderBy sorting and fuzzy query in Angular
vue vuex vue-rouert permission routing (detailed tutorial )
How to get the keyCode of the keyboard in javascript
The above is the detailed content of How to implement component interaction in Angular2. 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

AI Hentai Generator
Generate AI Hentai for free.

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

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y

So here you are, ready to learn all about this thing called AJAX. But, what exactly is it? The term AJAX refers to a loose grouping of technologies that are used to create dynamic, interactive web content. The term AJAX, originally coined by Jesse J

This article series was rewritten in mid 2017 with up-to-date information and fresh examples. In this JSON example, we will look at how we can store simple values in a file using JSON format. Using the key-value pair notation, we can store any kind

Enhance Your Code Presentation: 10 Syntax Highlighters for Developers Sharing code snippets on your website or blog is a common practice for developers. Choosing the right syntax highlighter can significantly improve readability and visual appeal. T

Leverage jQuery for Effortless Web Page Layouts: 8 Essential Plugins jQuery simplifies web page layout significantly. This article highlights eight powerful jQuery plugins that streamline the process, particularly useful for manual website creation

This article presents a curated selection of over 10 tutorials on JavaScript and jQuery Model-View-Controller (MVC) frameworks, perfect for boosting your web development skills in the new year. These tutorials cover a range of topics, from foundatio

Core points This in JavaScript usually refers to an object that "owns" the method, but it depends on how the function is called. When there is no current object, this refers to the global object. In a web browser, it is represented by window. When calling a function, this maintains the global object; but when calling an object constructor or any of its methods, this refers to an instance of the object. You can change the context of this using methods such as call(), apply(), and bind(). These methods call the function using the given this value and parameters. JavaScript is an excellent programming language. A few years ago, this sentence was
