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Attribute

decorator

Parameter decorator for a directive constructor that designates a host-element attribute whose value is injected as a constant string literal.

Option Description
attributeName

The name of the attribute whose value can be injected.

Options

The name of the attribute whose value can be injected.

attributeName: string

Usage notes

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

<input type="text">

The following example uses the decorator to inject the string literal text.

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

Example as TypeScript Decorator

@Component({selector: 'page', template: 'Title: {{title}}'})
class Page {
  title: string;
  constructor(@Attribute('title') title: string) { this.title = title; }
}

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Licensed under the Creative Commons Attribution License 4.0.
https://angular.io/api/core/Attribute