You can also define some code to run every time an element is rendered. You can use this hook to wire up any JavaScript library to the element that Ember has created.
All Ember views have a $ function, which is the normal jQuery function, scoped to the current element. You can also call this.$() to get back a jQuery object wrapping the element itself.
You can use this hook to do anything you want, allowing you to hook in any library you want. You would use this hook a lot like you’d use a jQuery(document).ready hook, but scoped to the view being created.
Ember also provides a willDestroyElement hook, which you can use to tear things down that you set up when the element was inserted. This is relatively rare, and is mostly used when interfacing with another toolkit that requires a teardown, or to tear down custom Ember observers.
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