What is the purpose of the ng-init directive?
Instruction: Explain when and why the ng-init directive should be used in AngularJS applications.
Context: This question assesses the candidate's understanding of AngularJS directives, particularly ng-init, and its role in initializing application data.
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ngInit evaluates an AngularJS expression in the current scope when that directive instance is linked. It is not a general reactive initialization service and does not, by itself, add a watcher that keeps the expression running after every change.
Its documented uses are narrow, including examples/development data and aliases for special ngRepeat properties...