Develop Reference

Want to add none as value in select multiple

I am using chosen.jquery.js for select field
<select chosen multiple data-placeholder="Select Body Part(s)"
ng-options="option.Name as option.Name for option in BodyPartList" ng-model="Body_Part">
<option value="" disabled>Select Body Part(s)</option>
</select>
But It shows only data-placeholder value in case of no data in model.
I want to show "Select Body Part(s)" as a option in list.
And user must not select this. Reason is that, I want to add dynamic "Unknown" value in list of Body_Parts. But it not reflect in list.
Same work for select having single selection.

I'm not seeing any problems with your code, as such. Like, I'm trying it and getting the visual behaviour I think you're wanting? Am I missing something?
Html just yours with ng-app etc, javascript is:
var myApp = angular.module('myApp', ['localytics.directives']);
myApp.controller('MyController', function($scope) {
$scope.BodyPartList = [
{ Name: "Arm" },
{ Name: "Leg" }
];
$scope.Body_Part = [];
});
Not sure if data-placeholder is actually doing anything.
Fiddle: http://jsfiddle.net/7187f6d9/
That said, it's not "working". In the fiddle I put a regular select box alongside the chosen one, and the chosen one doesn't seem to be writing to the ng-model correctly. I'm not sure what's up with that.

You can choose the below option
https://harvesthq.github.io/chosen/#optgroup-support
or push another item to the top of the array from server side as your custom label and disable it on client side with the help of ng-if and $index properties of ng-repeat and angularjs. If this make sense then its fine else i can give you a demo.

I hope your query is, you want show a place holder as current selected value but user shouldn't be able to select it.
Instead of making it disabled, make ithidden. Then display an error if a user doesn't select any other options, using the value of placeholder option.
A sample snippet is added below. If value of select is Error, write a case to throw a error back to user.
<select>
<option value="Error" hidden>Select any Company</option>
<option value="Toyota">Toyota</option>
<option value="Nissan">Nissan</option>
<option value="BMW">BMW</option>
</select>
Hope this helps! If not, ping me with your query. :)

Angular blank option selected

I'm banging my head against the wall on this one.
I have an array of objects that will be used to populate a select drop down:
CardCount = [{"ClientId": "0010", "Description": "0010 (206 Members)"}, {"ClientId": "0051", "Description": "0051 (1 Member)"}, ........]
When I attempt to use ng-options, the value of the option is set to the index, not to the ClientId as desired. To get the value in each option to be the ClientId, I have to use a ng-repeat in the options. Here is my html:
<select ng-model="CurrentClient">
<option ng-repeat="item in CardCount" value="{{item.ClientId}}">{{item.Description}}</option>
</select>
Initially, all is well, the select and options are generated correctly, and the first option is correct. Now, when a certain button is clicked somewhere else on the page, it becomes necessary to recreate this select and options with a smaller array of similar objects. However, doing so creates a blank option with a value of "? string:0010 ?". This is the option that is selected. Again, I cannot use ng-options to correct this problem because doing so doesn't set the value attribute in the option tags correctly. So, I added this to the option tag:
<option ng-repeat="item in CardCount" value="{{item.ClientId}}" ng-selected="CurrentClient == item.ClientId">{{item.Description}}</option>
Now, that does mark the correct option as selected. However, the drop down still shows the blank option. Here's the rendered html:
<select ng-model="CurrentClient">
<option value="? string:0010 ?"></option>
<option value="0010" selected="selected">0010 (206 Members)</option>
</select>
As you can see, it sets the correct option to selected. However, it sets it to selected="selected", and not just selected. When I inspect element and change selected="selected" to selected (remove the equals and everything after it), the drop down then correctly displays the correctly selected option.
Again, initially the select and options work great. The problem seems to happen only after the array that the select is created with is changed. How can I get this select and options working correctly after I change the array, and not show that first blank option?
Thanks!

Changed you option element to set value by default.
<option ng-repeat="item in CardCount track by item.ClientId"
value="{{item.ClientId}}">{{item.Description}}</option>
Hope this could help you. Thanks.

ng-options is definitely the way to go:
<select ng-model="selected.ClientId" ng-options="it.ClientId as it.Description for it in clientList">
<option value="">-</option>
</select>

Validating select element based on pattern with AngularJS

I'm developing an Angular app and I have a form set up which I need to run validation on. One of the form elements is a <select>, like this:
<select name="noOfPeople" ng-model="noOfPeople">
<option>No of people*</option>
<option ng-repeat="amt in [] | range:12">{{ amt +1 }}</option>
</select>
Because the design doesn't allow for labels on form elements, the label is essentially the first option in the select element. I want this control to be invalid unless it matches the following pattern: /^[0-9]$/.
I have tried using ng-pattern on the <select> however that doesn't seem to have any effect, Angular always thinks the control is valid.
The only other way I can think of doing it is writing a function in my controller to check if this control is valid and block the form from submitting if it's not. But I don't want to introduce a random validation function into my nice clean controller.
What's the best way to deal with this?

You can use the ng-options attribute here, rather than ng-repeat, and attribute a blank value to any options you wish to ignore. For example:
<select name="noOfPeople" ng-model="noOfPeople" ng-options="value for value in [] | range:12">
<option value="">No of people*</option>
<option value="">This won't count either!</option>
</select>
<p>Selected Value: {{noOfPeople}}<p>
If you explicitly require the regex checking to occur, you could write a filter and add it to the ng-options.

need to display other field on live status of other field

When a user selects a state from a state drop-down, it will display a list of high-schools in a drop-down field.
I am able to display the high schools once the user selects a state, but I am having trouble when the user submits the form w/o selecting a high school. If they do not select a high school, it will not display the form.
That is not really the problem, that is one of the ways the form can fail validation, which brings me to my question.
When the user fails validation, it will display the same form with the fields filled in the info they inputted before submitting the form.
The state drop-down is pre selected with the state they selected, but the high school drop down is no where to be seen. If I unselect the state drop-down, then re-select a state, then the high school list will display.
I am using a bind change on the #state field.
How can I display the high school field w/o having to wait for a click or change on the state field?
<select name="state" id="state">
<option></option>
<option value="NY">NY</option>
<option value="TX">TX</option>
</select>
<select name="high_school" id="high_school">
<option></option>
<option value="Bayside High">Bayside High</option>
<option value="Ridgemont High">Ridgement High</option>
</select>
$("#high_school").hide();
$('#state').bind('change', function() {
$("#high_school").show();
});
I assume I'll need to keep an eye on #state on load

Your are right, about keeping an eye on #state on load.
//check to see if something in #state is selected, if not hide #high_school
if($("#state").val() == '') {
$("#high_school").hide();
}
$('#state').bind('change', function() {
$("#high_school").show();
});
see: http://jsfiddle.net/89K5G/
Try choosing #state, and refresh the frame :)

JS/Jquery: how to check whether dropdown has selected values?

I've googled and tried a number of ways to do this but none work for me so far. What I am looking for is quite simple: I want to be able to tell whether a dropdown has a selected value or not. The problem is that selectedIndex, :selected, val(), etc. do return results for the following case:
<select>
<option value="123">123</option>
<option value="234">234</option>
</select>
Obviously the browser will display this dropdown with the 123 option being selected but it will be selected only because there are no other options, in reality this dropdown doesn't have a selected value because there is no "selected" property. So basically I am trying to find how to tell apart the above dropdown from this one
<select>
<option selected value="123">123</option>
<option value="234">234</option>
</select>

var hasValue = ($('select > [selected]').length > 0);
Alternatively,
var hasValue = $('select').has('[selected]');

Quick solution:
<select>
<option selected></option>
<option value="123">123</option>
<option value="234">234</option>
</select>
Then see if you have a .val()

The approved answer doesn't seem to work for me.
Here is how I do it to check if all select options are selected:
if($('select option:selected').length > 0) {
/* Do your stuff here */
}

As far as I can tell, there is no functional distinction between your two examples. Essentially, the browser automatically selects the first option.
See, for example, the result of
$('option:selected')
on your first example.
If you really want to prevent this happening, you have two options. The first is to introduce a new, empty element into the select, per Jason's answer. The other option is to deselect the automatically selected value:
$(document).load(function(){
$('option:selected').attr('selected', false);
});
This clears the selection. Any result of $('select').val() that isn't an empty string will therefore be a change by the user.