How to access a constant in an Angular 2 component and service?

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In Angular2, the template can only access fields and methods of the component class. Everything else is off-limits. This includes things which are visible to the component class.

The way to go around this is to have a field inside the component, which just references the constant, and use that instead.

It’s one limitation of the design, but perhaps you should think a bit more about why you need a constant in the template in the first place. Usually these things are used by components themselves, or services, but not the template.

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