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Angularjs - placeholder for empty result from filter

javascript
angularjs
filtering
accessibility
Anton ShumikhinbyAnton Shumikhin·Dec 9, 2024
TLDR

Use AngularJS's ng-show to display a placeholder when a filter returns an empty result:

<div ng-app="myApp" ng-controller="myListCtrl"> <ul><li ng-repeat="item in filteredItems = (items | filter:searchText)" ng-bind="item"></li></ul> <p ng-show="!filteredItems.length">No items found.</p> </div>

Acceleration tip: We use !filteredItems.length after filtering items. When length equals 0, it displays the message "No items found".

Enhancing efficiency and accessibility

Let's kick-off optimizing the filter in HTML and reference it only once. This results in a performance boost. Also, use aria-labels to assist screen-reader users.

<input type="text" ng-model="searchText" aria-label="Search items" placeholder="Search..."> <ul> <li ng-repeat="item in items | filter:searchText as filteredItems" ng-bind="item"></li> </ul> <p ng-show="!filteredItems.length">No items found.</p>

Turbo-charging transitions

Now, let's animate things up, adding transitions for the ease-in-out effect using the animate-repeat class.

.animate-repeat { transition: all 0.5s ease-in-out; /* Slide, don't walk */ }

Use this class in the ng-repeat directive to apply the transition:

<li ng-repeat="item in filteredItems = (items | filter:searchText)" ng-bind="item" class="animate-repeat"></li>

Tip: Keep your app consistent. Close all HTML tags properly and maintain sleek, organized code.

Dynamically fine-tuning updates

A cool feature: dynamically update the list inline:

<input type="text" ng-model="searchText" aria-label="Search items" placeholder="Search..."> <ul> <li ng-repeat="item in items | filter:searchText as filteredItems" ng-bind="item" ng-click="selectItem(item)"></li> </ul> <p ng-show="!filteredItems.length">No items found.</p>

When an item is selected, ng-click activates to apply the selected filter action. Consistent readability ensures longevity for your app.

Code organization and best practices

Abiding by the official AngularJS guide is smart. Organize your application well:

  • Leverage ng-if or ng-show/ng-hide for conditional display.
  • ng-model allows real-time filtering. As you type, it reacts!
  • Display a "<No result>" message indicating no filter matches.
  • Share code snippets using <pre><code> tags. It's the programmer's Instagram!
  • Include jsFiddle links for a comprehensive code insight.

Wrap-up

By leveraging AngularJS constructs, we enhance user experience, ensure accessibility, and keep things dynamic. Practice amplifies skill. If you find this helpful, vote for my answer! Happy hacking!👩‍💻