Developing an attribute in a constructor using Typescript

Question

Developing an attribute in a constructor using Typescript

My javascript code is functioning perfectly:

class myController {
   constructor () {
      this.language = 'english'
   }
}

However, I encountered an issue when trying to replicate the same in Typescript

export default class myController {
  constructor () {
    this.language = 'english'
  }
}

This resulted in the following error:

Property 'language' does not exist on type 'myController'.ts(2339)

Why does this error occur when attempting to create a property for myController?
What would be the correct approach to resolve this issue?

javascript typescript

Answer 1

Answer №1

It seems that the error is occurring because you are attempting to assign a value to a property that has not been declared in the class. Make sure to declare the property before setting its value, like this:

export default class myController {
  private language: string;
  constructor () {
    this.language = 'english'
  }
}

Answer 2

It seems that the error is occurring because you are attempting to assign a value to a property that has not been declared in the class. Make sure to declare the property before setting its value, like this:

export default class myController {
  private language: string;
  constructor () {
    this.language = 'english'
  }
}

Answer 3

Answer №2

To properly define it, you must declare it as a Property on the type (usually done before the constructor method):

export default class myController {
  preferedLanguage: string;
  constructor () {
    this.preferedLanguage = 'english'
  }
}

Answer 4

To properly define it, you must declare it as a Property on the type (usually done before the constructor method):

export default class myController {
  preferedLanguage: string;
  constructor () {
    this.preferedLanguage = 'english'
  }
}

Developing an attribute in a constructor using Typescript

Answer №1

Answer №2

Similar questions

The radio button is not appearing correctly in my HTML form

Is there a noticeable distinction or significant benefit between using auth.signOut() and signOut(auth)?

What does an exclamation mark signify in Angular / Type Script?

What function is being executed in this specific scenario?

A guide on testing mouse clientY in React using JEST for effective testing

I possess a single input field and I am seeking to have the focus shifted to it upon the activation of a button

Issues with Ionic 3 Directive Not Functioning

Adding the <br> tag in a Bootstrap modal: a simple guide

What is the best way to display these images correctly within a slider?

Experiencing issues with the Google Drive file selection API due to JavaScript

Spin an object around the global axis using the tween.js library

Choosing specific information from a deeply nested JSON structure

Retrieve the fully loaded webpage source code in Java as it is displayed by the browser

Returning to the location in the file where the redirect function was invoked in the Express framework

Retrieve all the records from the collection that have a specific reference number in their ID field

Retrieve data from a form on the server side using an Ajax request

Repairing the 'Uncaught TypeError: Cannot read property 'split' of undefined' bug in a Prestashop Module

Having trouble with my jQuery .hover() code not running as expected

"Uncovering a memory leakage issue within a recursive polling function in JavaScript

Using javascript to locate and substitute a word divided among multiple tags - a step-by-step guide