Is it advisable to combine ng-change with ng-blur in AngularJS?

Seeking clarification on the correct usage of AngularJS's ng-change and ng-blur from an expert. Specifically, when updating a form value.

  1. In the code snippet below, I have a dropdown where I would like to trigger overrideBusinessDec() when the user changes the dropdown selection. However, due to ng-blur, the function is currently being called when clicking away from the form. Removing ng-blur resolves this issue temporarily.
  2. Another situation arises during editing, the form values are populated but the form remains disabled unless ng-blur is added. How can I address this?

Is there a universal solution to tackle both issues?

<!-- main.html -->
<div>
    <select kendo-drop-down-list k-data-value-field="'id'"
        k-data-text-field="'text'" k-option-label="'Select'"
        k-data-source="ctrlEffOptions"
        ng-disabled="!processRating.controlEffectivenessRatingComputeKey"
        ng-model="processRating.controlEffectivenessRatingOverrideKey"
        ng-change="overrideBusinessDec()" id="controlEffBusiness" required ng-model-options="{updateOn: 'blur'}">
    </select>
</div>

Answer №1

ng-change triggers when the content of the element changes, making it a suitable option for your dropdown selection. It's also ideal for a text input field if you want actions to occur as you type, such as autocomplete functionality. If you prefer to wait until the user finishes editing and exits the text field, consider using on-blur, which activates when the field loses focus.

on-blur does not determine whether your form fields are enabled or disabled. There must be another factor causing this behavior.

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