Encountering difficulties accessing private variables within the template/html in Angular 5

After creating multiple variables and accessing them in their respective templates or HTML files, I've realized that having all variables set as public can be problematic. I want to convert these public variables to private, but when I do so, I receive errors stating that private members cannot be utilized outside of the class. While this conceptually makes sense, it brings up the question of why I can't access private variables created in the TypeScript file from the corresponding template or HTML file within the same component.

If TypeScript files and HTML/template files are considered separate entities, how can I go about accessing private variables in the HTML?

My development is based on TypeScript.

  1. I've converted public variables to private in the TypeScript file.
  2. Now, I want to use private variables within the HTML of the same component.

Example in test.component.ts:

public myVar = 'iCreatedThisVariable';

          convert to

private myVar = 'iCreatedThisVariable';

Example in test.component.html:

<p>{{myVar}}</p>

It should be possible to use private variables in the HTML if both the TypeScript file and HTML belong to the same class.

If they are indeed separate, how can I go about accessing private variables in HTML using Angular 2+?

Answer №1

In Angular, the AoT compiler requires public members in controller classes to be able to use them in templates. This is because the concept of public and private members does not exist in the TypeScript code once it is compiled down to ES5.

Access modifiers should be used for component composition and encapsulation, rather than for templates and controllers.

If you need to encapsulate the controller's variables but still want to access or set data, consider creating corresponding methods such as getters and setters.

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