Angular 2 – Two Ways to Initialize Component Properties

This article represents two different ways in which Angular 2 components properties can be initialized. Please feel free to comment/suggest if I missed to mention one or more important points. Also, sorry for the typos.
Following are two different ways to initialize the component properties.

  • In the example below, component’s property is initialize through variable assignment. Take a look at the code “name = ‘Calvin Hobbes'”. This approach is sometimes preferable because it makes code easy to read and also, there will be lesser code to write.
    import {Component, View} from 'angular2/core';
    
    @Component({
      selector: 'user'
    })
    @View({
      template: '{{name}}'
    })
    export class UserComponent {
      name = 'Calvin Hobbes';
    }
    
  • In the code below, the property is first declared and then initialized inside the constructor.
    import {Component, View} from 'angular2/core';
    
    @Component({
      selector: 'user'
    })
    @View({
      template: '{{name}}'
    })
    export class UserComponent {
      name: string;
    
      constructor() {
        this.name = 'Calvin Hobbes';
      }
    }
    

 

Ajitesh Kumar
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Ajitesh Kumar

I have been recently working in the area of Data analytics including Data Science and Machine Learning / Deep Learning. I am also passionate about different technologies including programming languages such as Java/JEE, Javascript, Python, R, Julia, etc, and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data, etc. For latest updates and blogs, follow us on Twitter. I would love to connect with you on Linkedin. Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking
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