ng-selected not working in select element
Solution 1
ng-selected
should be used in the <option>
tag, not in the <select>
tag. Take a closer look at its doc and the example.
Because the select
directive's determination of the selected option is based on ngModel
. Therefore, once you remove ng-selected="c.CollegeName == collegeSelection.CollegeName"
, your code should work.
I created a very simple plunk to demonstrate the "selected" feature in select
directive.
More details:
AngularJS uses ngModel
directive to enable "two-way data binding" between your model and UI elements.
In the case of "select", the model collegeSelection
you specified as <select ng-model="collegeSelection" ...>
is the selected item. Which means if an user selects an item from the dropdown on the page, collegeSelection
will be set to that item; and, if you set collegeSelection
to an item in your javascript code, AngularJS will make sure that the corresponded <option>
is selected.
Say you have the following code in your controller:
$scope.colleges = [
{id: 0, name: 'a'},
{id: 1, name: 'b'},
{id: 2, name: 'c'}
];
$scope.collegeSelection = $scope.colleges[0];
And the HTML looks like:
<select ng-model="collegeSelection" ng-options="c as c.name for c in colleges"></select>
That's it! The first college in the colleges array will be selected if you run the code.
Just remember collegeSelection
is the selected option, no matter it's because user selected an item on the UI, or you selected an item in javascript.
That's how two-way data binding works.
Solution 2
After playing around with ng-selected
for a while I was not able to get it to work like you're asking. However, I was able to pre-select a specific option using ng-init
.
Here's a JSFiddle of my solution. My <select>
ended up being:
<select ng-model="selectedColor" ng-options="color.value as color.name for color in colors" ng-init="selectedColor='yellow'">
<option value="">Select A Color</option>
</select>`
And my colors
array is:
colors = [
{name:'Red', value: 'red'},
{name:'Orange', value: 'orange'},
{name:'Yellow', value: 'yellow'},
{name:'Green', value: 'green'},
{name:'Blue', value: 'blue'},
{name:'Indigo', value: 'indigo'},
{name:'Violet', value: 'violet'}
]
Changing the ng-init="selectedColor='yellow'"
to another value will select a different option.
Solution 3
Some people have problems with this. I found a great solution for a simple drop down if controller as someController
var vm = this;
this.colors = [
{name:'Red'},
{name:'Orange'},
{name:'Yellow'},
{name:'Green'},
{name:'Blue'},
{name:'Indigo'},
{name:'Violet'}
];
this.color_selected = "Yellow";
<select ng-model="someController.color_selected" ng-options="opt.name as opt.name for opt in someController.colors">
</select>
`
Related videos on Youtube
rross
Updated on December 30, 2020Comments
-
rross over 3 years
I have a bound select
<select ng-model="collegeSelection" ng-options="c as c.CollegeName for c in colleges" ng-selected="c.CollegeName == collegeSelection.CollegeName" name="selectCollege" id="selectCollege"></select>
but when both c.CollegeName == collegeSelection.CollegeName match the item still isn't selected. Documentation doesn't seem to help. Any ideas?
-
rross almost 11 yearsI see, but what I'm trying to do is make a certain item within the select element the selected element. How would one do that?
-
Ye Liu almost 11 yearsYou just need to set the
collegeSelection
model. -
Ye Liu almost 11 yearsYou don't necessarily need
ngInit
. Try to add$scope.selectedColor = 'yellow';
after your$scope.colors = [...];