Sep 21, 2015
watchOnce
$watchOnce
This module adds $watchOnce, $watchGroupOnce, and $watchCollectionOnce to angular scopes. Each of these have the same signature as their angular counterparts. The difference is the listener you provide is only called once, and only when the value is defined. Note that for $watchGroupOnce, it will only be called when every expression’s value is defined. Also, $watchGroupOnceis only…
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