CODEWITHSUNDEEP
angularjsangularjs-directive
chrisl08
chrisl08

Reputation: 1658

How do I know if directive is enclosed in a container with ng-if = false?

I am developing a custom directive and now I need to handle ng-if. This is easy enough when ng-if is on the directive it self. However when ng-if is on an enclosing container element my compile function fails with run time errors.

Question is: what is the best and most efficient way to know, inside the compile function of a directive, that the directive is enclosed within a container with ng-if is false OR an expression that evaluates to false.

For example:

<div ng-if="false">
    <my-directive></my-directive> 
</div>

And another example:

<div ng-if="somescopeValue > 300">
    <my-directive></my-directive> 
</div>

Maybe the answer is using jquery to traverse the dom and find a parent with an ng-if attribute but I was wondering if there is another more "angular" way of doing this.

Upvotes: 0

Views: 285

Answers (3)

Icycool
Icycool

Reputation: 7179

I'm not sure how the error happens, because when your directive is inside ng-if="false", your directive won't get called at all - all compile, link and controller function in the directive will only run as soon as your directive gets added in DOM.

Perhaps your error can be solved by initializing something in case your directive is not added.

Upvotes: 0

Hardik Patel
Hardik Patel

Reputation: 3949

If you are using same scope as parent controller or directive then you are able to access same variable in your directive(here my-directive) also. If this is not a case then you need to write code to access parent element in link function of my-directive. You will get directive element in link function as a parameter.

Upvotes: 0

jberndsen
jberndsen

Reputation: 351

Your directive shouldn't rely on knowing whether it is encapsulated in a ng-if expression. That breaks the principle of 'Separation of Concerns' and deteriorates code re-use. Consider redesigning your custom directive in such a way that it needs not be aware of its host elements, in the same fashion that all components (should) work.

Upvotes: 1

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