Mastering Title Decorator in Angular: A Comprehensive Guide

In Angular, a title decorator is a way to easily set and update the title of a component. This can be useful for displaying the current page or section in the browser’s title bar, as well as for SEO and accessibility purposes. In this article, we’ll go over how to set up and use a title decorator in Angular.

Setting up the title decorator First, we’ll need to import the necessary modules and components. In your app.module.ts file, import the Component decorator from @angular/core and the Title service from @angular/platform-browser. Next, we’ll create a new decorator by using the @Component decorator and adding a new property called “title”. Then we will apply the decorator to a component.

import { Component } from '@angular/core';
import { Title } from '@angular/platform-browser';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
  providers: [Title]
})
export class AppComponent {
  title = 'My App';
}

Using the title decorator Once the title decorator is set up, we can pass a title to it by using the “title” property. The title can be a string or a variable that is updated dynamically. To display the title in the component’s template, we can simply add the {{ title }} variable to the template. For dynamic updates, we can use a service to set the title, and inject it into the component.

import { Component } from '@angular/core';
import { Title } from '@angular/platform-browser';

@Component({
  selector: 'app-root',
  template: `<h1>{{ title }}</h1>`,
  providers: [Title]
})
export class AppComponent {
  title: string;

  constructor(private titleService: Title) {
    this.title = 'My App';
    this.titleService.setTitle(this.title);
  }
}

Advanced usage In addition to setting the title on a single component, we can also inject the title decorator into multiple components. This allows us to easily update the title across multiple pages or sections of the app. We can also combine the title decorator with other decorators, such as the @Input() decorator, to pass data into the component and update the title dynamically.

import { Component, Input } from '@angular/core';
import { Title } from '@angular/platform-browser';

@Component({
  selector: 'app-page',
  template: `<h1>{{ title }}</h1>`,
  providers: [Title]
})
export class PageComponent {
  @Input() title: string;

  constructor(private titleService: Title) {
    this.titleService.setTitle(this.title);
  }
}

Conclusion Using a title decorator in Angular can make it easy to set and update the title of a component, which can be useful for SEO and accessibility purposes, as well as for displaying the current page or section in the browser’s title bar. By setting up the title decorator, passing a title to it, and displaying the title in the component’s template, we can easily implement a title decorator in our Angular application. Additionally, by using a service and injecting it into multiple components, we can easily update the title across multiple pages or sections of the app. Additionally, by combining the title decorator with other decorators such as the @Input() decorator, we can pass data into the component and update the title dynamically.

In summary, a title decorator in Angular is a powerful tool that can help improve the user experience, accessibility and SEO of your application. With a little bit of setup and some simple code, you can easily implement a title decorator in your own Angular application and start reaping the benefits.

For further learning and to explore more advanced usage of title decorator, you can refer to the Angular documentation and other online resources. There are also several npm packages available that provide additional functionality for working with titles in Angular.