By Matt Frisbie
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Using @, =, and &, you are instructing the directive to ignore the scopes it would normally inherit, and only utilize data, variables, and methods that you have provided interfaces for instead. There's more… If the directive is designed as a specific modifier for an aspect of your application, you might find that using isolate scope isn't necessary. On the other hand, if you're building a reusable, monolithic component that can be reused across multiple applications, it is unlikely that the directive will be using the parent scope in which it is used.
Innerval(); // invoked! net/msfrisbie/1u24c4o8/ Here, you are instructing the child directive to evaluate the expression passed to the myattr attribute within the context of the parent controller. In this case, the expression will invoke the func() method, but any valid AngularJS expression will also work. You can invoke it as you would invoke any other scope method, including parameters as required. 23 Maximizing AngularJS Directives How it works… Isolate scope is entirely managed within the scope attribute in the directive's returned definition object.
Full data binding between scopes is supported, and all unnamed attributes and methods in the parent scope are ignored. 22 Chapter 1 Taking a step further, methods can also be pulled down from the parent scope for use in the directive. In the same way that a model variable can be bound to the child scope, you can alias methods that are defined in the parent scope to be invoked from the child scope but are still in the parent scope context. innerval(); // invoked! net/msfrisbie/1u24c4o8/ Here, you are instructing the child directive to evaluate the expression passed to the myattr attribute within the context of the parent controller.
AngularJS Web Application Development Cookbook by Matt Frisbie