AttributeMetadata

export class AttributeMetadata

exported from angular2/core defined in angular2/src/core/metadata/di.ts (line 3)

Specifies that a constant attribute value should be injected.

The directive can inject constant string literals of host element attributes.

Example

Suppose we have an <input> element and want to know its type.

<input type="text">

A decorator can inject string literal text like so:

@Directive({selector: 'input'})
class InputAttrDirective {
  constructor(@Attribute('type') type) {
    // type would be 'text' in this example
  }
}