Combining Multiple Directives on an Element in AngularJS with One Using Isolate Scope

Curious about the current behavior and looking for an explanation.

I have a directive with isolate scope, named dirA. Then I add another directive on top of it, called dirB. My expectation was that the second directive would inherit the isolate scope created by dirA.

Instead, dirB is accessing the controller scope. Why isn't it inheriting the same isolate scope from dirA?

Any assistance is greatly appreciated. I don't have specific code to share at the moment, just seeking clarity. If needed, I can provide two simple directives along with some HTML for better visualization. Thank you in advance.

javascriptangularjsangularjs-directive

Answer №1

The observation is indeed accurate, and this particular behavior has been intentionally designed in this manner.

When a directive requests an isolated scope in AngularJS, a separate scope is created specifically for that directive, rather than for the element on which the directive is declared. In simpler terms, isolation occurs at the directive level, not at the element level. This simplifies the process of coding reusable and self-contained directives, as it eliminates the need to prevent any unintended interference with the isolated scope by other directives.

Any additional directives declared on the same element will share the outer scope. It should be noted that these directives are unable to request their own scope, whether isolated or not. Although there was a bug causing uncertainty before version 1.3, this issue has been resolved in version 1.3.

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