I've come across various discussions on implementing a 3-state checkbox with a directive or using CSS tricks (such as setting 'indeterminate=true' which doesn't seem to work).
However, I'm curious if there's another method to create a 3-state checkbox for three different values (true, false, and null).
The visual representation of the 3 states would be:
To display a checkbox in an indeterminate state, utilize the ng-prop-indeterminate directive to establish the indeterminate property of the checkbox.
<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app>
<input type="checkbox"
ng-model="checkState"
ng-prop-indeterminate="triState">
The Check Box<br>
<hr>
<input type="checkbox" ng-model="checkState">CheckState={{checkState}}<br>
<input type="checkbox" ng-model="triState">TriState={{triState}}<br>
</body>If you need more information, please refer to:
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