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How do you create dynamic dropdown lists in AngularJS using ng-options?
How do you create dynamic dropdown lists in AngularJS using ng-options?
Working with Select Using AngularJS's ng-options
In AngularJS, the ng-options directive allows you to dynamically generate
Generating Options from an Array
To generate options from an array, use the following syntax:
<select ng-model="selectedValue" ng-options="item.value as item.label for item in items">
where:
- selectedValue is the model variable that will be bound to the selected option
- items is the array containing the data for the options
- item.value is the value to be used for the value attribute of the option element
- item.label is the text to be displayed for the option element
Example
Consider the following AngularJS controller:
$scope.items = [
{id: '000001', title: 'Chicago'},
{id: '000002', title: 'New York'},
{id: '000003', title: 'Washington'}
];To render this data as a
<select ng-model="selectedItem" ng-options="item.id as item.title for item in items">
Selecting a Default Option
To select a specific option by default, use the ng-init directive:
<select ng-model="selectedItem" ng-init="selectedItem = items[1]" ng-options="item.id as item.title for item in items">
Customizing the Default Option
By adding a custom
<select ng-model="selectedItem">
<option value="">Select One</option>
<option ng-repeat="item in items" ng-value="item.id">{{item.title}}</option>
</select>Hiding the Default Option After Selection
To hide the custom default option after a selection is made, use ng-hide:
<select ng-model="selectedItem">
<option value="" ng-hide="selectedItem">Select One</option>
<option ng-repeat="item in items" ng-value="item.id">{{item.title}}</option>
</select>The above is the detailed content of How do you create dynamic dropdown lists in AngularJS using ng-options?. For more information, please follow other related articles on the PHP Chinese website!
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