CODEWITHSUNDEEP
angulardart
softshipper
softshipper

Reputation: 34061

What does const mean?

I am using angular2dart and want to know, why do I have to pass keyword const on:

directives: const [HeroDetailComponent]

component properties.

Upvotes: 3

Views: 1140

Answers (1)

Alexandre Ardhuin
Alexandre Ardhuin

Reputation: 76183

const means a compile-time constant. Been constant it can be optimized and instantiated only once.

const [HeroDetailComponent] means that the list is a compile time constant. Compile-time constants are mandatory when used as metadata (in your case directives is a named parameter of @Component() that is a metadata of your class).

Upvotes: 5

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