What is the best way to trigger a method in Angular when a user leaves an input field blank?

I have implemented controller methods to trigger upon changes in this specific input field:

<input type="text" ng-model="query" ng-model-options='{ debounce: 500 }' ng-change="searchOnTags(query)"/>

Is there a way to call a separate method when the input field becomes empty again?

Answer №1

To add conditional logic to your searchOnTags function, you can simply use an if statement as shown below:

$scope.searchOnTags = function(query) {
  console.log(query);
  if (!query) {
    console.log('No input provided');
  }
};

Answer №2

In the function called searchOnTags, make sure to check if the form is currently in a state of $pristine, indicating that the input field has returned to its original condition.

By editing a field, it becomes marked as dirty (ng-dirty). However, by clearing the input, you have the ability to reset the form back to its pristine state (ng-pristine).

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