By Matt Frisbie
Read Online or Download AngularJS Web Application Development Cookbook PDF
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Additional resources for AngularJS Web Application Development Cookbook
It's possible to chain directive forms together within the same definition. log() statements in this recipe should have given you some insight into the extraordinary use that directives can have in your application. See also ff The Interaction between nested directives recipe demonstrates how to allow directives attached to the same element to communicate with each other Manipulating the DOM In the previous recipe, you built a directive that didn't care what it was attached to, what it was in, or what was around it.
See also ff The Optional nested directive controllers recipe demonstrates how to handle a scenario where parent or sibling controllers might not be present Optional nested directive controllers The AngularJS construct that allows you to build channels of communication between directive siblings or parents in the same DOM ancestry also allows you to optionally require a directive controller of a sibling or parent. html, the missingDirective is not present. A ? prefixed to the require array element denotes an optional controller directive.
This is because the event that the application is listening for does not occur in the AngularJS context—it is merely a browser DOM event, which AngularJS does not listen for. $apply() wrapper to trigger the update of the DOM. With all of this, your cursor movement should constantly be invoking the event handler, and you should see a real-time description of your cursor's relative cardinal locality. There's more… In this directive, we have used the scope parameter for the first time. You might be wondering, "Which scope am I using?