How to access a globally-defined constant in an Angular 2 template file

In a separate file called constants.ts, I have several string constants defined like this:

export const MY_PLACEHOLDER: string = 'some placeholder';

When working on an Angular2 component template, I need to utilize the MY_PLACEHOLDER constant in this manner:

<input ... [placeholder]=MY_PLACEHOLDER />

To achieve this, I currently import the constant in my my-component.ts file as shown below:

import {MY_PLACEHOLDER} from './constants'
and then proceed to use it within the template file.

Although this approach works smoothly, I encounter a tslint warning stating that "MY_PLACEHOLDER" is an unused property whenever I repeat this process for each constant.

Is there a way for me to reference or utilize these external constants within the template file without triggering this warning?

EDIT: I am aware that I can disable the tslint warning if needed.

Answer №1

It is recommended to assign the constant property to a variable at the component level and then utilize it in the template.

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