Learning Angular: A Hands-On Guide to Angular 2 and Angular 4 by Dayley Brad & Dayley Brendan & Dayley Caleb

Author:Dayley, Brad & Dayley, Brendan & Dayley, Caleb [Dayley, Brad]
Language: eng
Format: azw3
Publisher: Pearson Education
Published: 2017-09-19T04:00:00+00:00

The web page that results from Listings 8.5 through 8.10 is shown in Figure 8.2.

Figure 8.2 Custom component directive

Summary

Angular directives extend the behavior of HTML. Directives can be applied to Angular templates as HTML elements, attributes, and classes. The functionality of directives is defined in the @directive class. Angular provides several built-in directives that interact with form elements, bind data, and interact with browser events. For example ngModel binds the value of a form element directly to the component. When the component value changes, so does the value displayed by the element and vice versa.

One of the most powerful features of Angular is the ability to create your own custom directives. Implementing a custom directive in code is simple, using the @directive class. However, directives can also be very complex because of the myriad ways they can be implemented.

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