Tips for toggling helper messages during form validation using AngularJS

I've integrated ngMessages into my AngularJS application for form validation, and it has been quite helpful. However, I've encountered a challenge that I can't seem to figure out.

For example, consider the following code snippet within my Form named: testForm

<input type="text" name="test1" class="form-control" ng-model="test1" required>

<span class="help-block" ng-hide="testForm.test1.$error">Please enter the a test name</span>

<div ng-messages="testForm.test1.$error" ng-if="testForm.test1.$dirty">
    <div class="text-danger" ng-message="required">This field is required</div>
</div>

I am trying to configure the helper message to be hidden when there is an error in the textbox unless the user has not started typing anything yet ($dirty).

However, with the current setup, testForm.test1.$error always returns true, even if the field is empty, resulting in the message being constantly hidden.

What am I overlooking here?

EDIT:

To further clarify my goal:

  • While typing, show the helper message and hide the error message.
  • If there is an error, hide the helper message and display the error message.
  • If nothing has been typed yet, show the helper message and hide the error message.

Answer №1

Have you attempted using

ng-hide="testForm.test1.$error && testForm.test1.$dirty"
? This ensures that the message will always be displayed when the input field is clean (not dirty).


Update: From what I gather, you want the message to show when the input field is in focus.

To achieve this in your controller, set hasFocus to false initially:

$scope.hasFocus = false;

In your HTML document:

<input type="text" name="test1" class="form-control" ng-model="test1" 
  ng-focus="hasFocus=true" ng-blur="hasFocus=false" required>

<span class="help-block" ng-hide="!hasFocus && testForm.test1.$error && testForm.test1.$dirty">Please enter a test name</span>

<div ng-messages="testForm.test1.$error" ng-if="testForm.test1.$dirty">
    <div class="text-danger" ng-message="required">This field is required</div>
</div>

If it suits your needs, you can replace ng-hide with the following. This will hide the message when test1 is not empty and has an error.

ng-hide="!hasFocus && testForm.test1.$error && test1"

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