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How to trigger selection of an option using Jquery [duplicate]

I am using Angular JS and I need to set a selected option of a dropdown list control using angular JS. Forgive me if this is ridiculous but I am new with Angular JS
Here is the dropdown list control of my html
<select ng-required="item.id==8 && item.quantity > 0" name="posterVariants"
ng-show="item.id==8" ng-model="item.selectedVariant"
ng-change="calculateServicesSubTotal(item)"
ng-options="v.name for v in variants | filter:{type:2}">
</select>
After it gets populated I get
<select ng-options="v.name for v in variants | filter:{type:2}" ng-change="calculateServicesSubTotal(item)"
ng-model="item.selectedVariant" ng-show="item.id==8" name="posterVariants"
ng-required="item.id==8 && item.quantity > 0" class="ng-pristine ng-valid ng-valid-required">
<option value="?" selected="selected"></option>
<option value="0">set of 6 traits</option>
<option value="1">5 complete sets</option>
</select>
How can I set the control for value="0" to be selected?

I hope I understand your question, but the ng-model directive creates a two-way binding between the selected item in the control and the value of item.selectedVariant. This means that changing item.selectedVariant in JavaScript, or changing the value in the control, updates the other. If item.selectedVariant has a value of 0, that item should get selected.
If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$scope.selectedOption = $scope.options[1];
HTML:
<select data-ng-options="o.name for o in options" data-ng-model="selectedOption"></select>
This would leave the "b" item to be selected.

I don't know if this will help anyone or not but as I was facing the same issue I thought of sharing how I got the solution.
You can use track by attribute in your ng-options.
Assume that you have:
variants:[{'id':0, name:'set of 6 traits'}, {'id':1, name:'5 complete sets'}]
You can mention your ng-options as:
ng-options="v.name for v in variants track by v.id"
Hope this helps someone in future.

If you assign value 0 to item.selectedVariant it should be selected automatically.
Check out sample on http://docs.angularjs.org/api/ng.directive:select which selects red color by default by simply assigning $scope.color='red'.

i see here already wrote good answers, but sometime to write the same in other form can be helpful
<div ng-app ng-controller="MyCtrl">
<select ng-model="referral.organization" ng-options="c for c in organizations"></select>
</div>
<script type='text/javascript'>
function MyCtrl($scope) {
$scope.organizations = ['a', 'b', 'c', 'd', 'e'];
$scope.referral = {
organization: $scope.organizations[2]
};
}
</script>

Simple way
If you have a Users as response or a Array/JSON you defined, First You need to set the selected value in controller, then you put the same model name in html. This example i wrote to explain in easiest way.
Simple example
Inside Controller:
$scope.Users = ["Suresh","Mahesh","Ramesh"];
$scope.selectedUser = $scope.Users[0];
Your HTML
<select data-ng-options="usr for usr in Users" data-ng-model="selectedUser">
</select>
complex example
Inside Controller:
$scope.JSON = {
"ResponseObject":
[{
"Name": "Suresh",
"userID": 1
},
{
"Name": "Mahesh",
"userID": 2
}]
};
$scope.selectedUser = $scope.JSON.ResponseObject[0];
Your HTML
<select data-ng-options="usr.Name for usr in JSON.ResponseObject" data-ng-model="selectedUser"></select>
<h3>You selected: {{selectedUser.Name}}</h3>

It can be usefull. Bindings dose not always work.
<select id="product" class="form-control" name="product" required
ng-model="issue.productId"
ng-change="getProductVersions()"
ng-options="p.id as p.shortName for p in products">
</select>
For example. You fill options list source model from rest-service. Selected value was known befor filling list and was set. After executing rest-request with $http list option be done. But selected option is not set. By unknown reasons AngularJS in shadow $digest executing not bind selected as it shuold be. I gotta use JQuery to set selected. It`s important! Angular in shadow add prefix to value of attr "value" for generated by ng-repeat optinos. For int it is "number:".
$scope.issue.productId = productId;
function activate() {
$http.get('/product/list')
.then(function (response) {
$scope.products = response.data;
if (productId) {
console.log("" + $("#product option").length);//for clarity
$timeout(function () {
console.log("" + $("#product option").length);//for clarity
$('#product').val('number:'+productId);
//$scope.issue.productId = productId;//not work at all
}, 200);
}
});
}

Try the following:
JS file
this.options = {
languages: [{language: 'English', lg:'en'}, {language:'German', lg:'de'}]
};
console.log(signinDetails.language);
HTML file
<div class="form-group col-sm-6">
<label>Preferred language</label>
<select class="form-control" name="right" ng-model="signinDetails.language" ng-init="signinDetails.language = options.languages[0]" ng-options="l as l.language for l in options.languages"><option></option>
</select>
</div>

This is the code what I used for the set selected value
countryList: any = [{ "value": "AF", "group": "A", "text": "Afghanistan"}, { "value": "AL", "group": "A", "text": "Albania"}, { "value": "DZ", "group": "A", "text": "Algeria"}, { "value": "AD", "group": "A", "text": "Andorra"}, { "value": "AO", "group": "A", "text": "Angola"}, { "value": "AR", "group": "A", "text": "Argentina"}, { "value": "AM", "group": "A", "text": "Armenia"}, { "value": "AW", "group": "A", "text": "Aruba"}, { "value": "AU", "group": "A", "text": "Australia"}, { "value": "AT", "group": "A", "text": "Austria"}, { "value": "AZ", "group": "A", "text": "Azerbaijan"}];
for (var j = 0; j < countryList.length; j++) {
//debugger
if (countryList[j].text == "Australia") {
console.log(countryList[j].text);
countryList[j].isSelected = 'selected';
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<label>Country</label>
<select class="custom-select col-12" id="Country" name="Country" >
<option value="0" selected>Choose...</option>
<option *ngFor="let country of countryList" value="{{country.text}}" selected="{{country.isSelected}}" > {{country.text}}</option>
</select>
try this on an angular framework

JS:
$scope.options = [
{
name: "a",
id: 1
},
{
name: "b",
id: 2
}
];
$scope.selectedOption = $scope.options[1];

Set selection options depending on another select element's value in AngularJS

I nearly struggled as much naming this question as I am with the actual problem! I have two selects:
Select 1:
<select ng-change="bankSelected()" ng-model="user.bankName">
<option selected value="">Select</option>
<option ng-repeat="bank in banks" value="{{bank.name}}">{{bank.name}}</option>
</select>
Select 2:
<select ng-model="user.branch">
<option selected value="">Select</option>
<option ng-repeat="// what to do??"></option>
</select>
The 'bankSelected()' function in my controller:
$scope.bankSelected = function () {
console.log('Bank selected: ' + $scope.user.bankName);
}
I have a JSON file that I import all the bank objects from, here's an example:
{
"banks" : [
{
"name" : "Bank A",
"branches" : [
{
"name" : "Branch 1",
"code" : "1"
},
{
"name" : "Branch 2",
"code" : "2"
}
]
},
{
"name" : "Bank B",
"branches" : [
{
"name" : "Branch 3",
"code" : "3"
},
{
"name" : "Branch 4",
"code" : "4"
},
{
"name" : "Branch 5",
"code" : "5"
}
]
}
]
}
The JSON that I'm actually using though is about 1000 lines long. So my problem, is that if the user selects 'Bank A' in the first select box, I want the second select box to display 'Branch 1' and 'Branch 2'. Likewise if the user selects 'Bank B', I want to display 'Branch 3', 'Branch 4', and 'Branch 5'. If the user has not selected anything in the first select (e.g. no Bank selected), then the second select (branches) shouldn't contain anything. I'm sure you understand what I'm getting at?
How can I make this happen in AngularJS?

bank ng-repeat
<select ng-model="user.bankName">
<option selected value="">Select</option>
<option ng-repeat="bank in banks" value="{{bank.name}}">{{bank.name}}</option>
</select>
branch ng-repeat
<select ng-model="user.branch" ng-show="user.bankName">
<option selected value="">Select</option>
<option ng-repeat="branch in getBranches(user.bankName)" value="{{branch.code}}">{{ branch.name }}</option>
</select>
source of the branch repeat is assign to getBranches() function in the scope and here we pass the bank name which selected before.
in that function
$scope.getBranches = function(selectedBank) {
// get the selected bank object from the banks array
var filteredBank = $filter('filter')($scope.banks, selectedBank);
// return the branches of the selected bank
return filteredBank[0].branches;
};
don't forget to inject the $filter service as below
app.controller('CtrlName', function($scope, $filter) {...
here is the DEMO
If you can change your select to something like below it will be more cleaner :)
this will select the whole object of the selected option.
<select ng-model="user.bankName" ng-options="bank.name for bank in banks">
</select>
here we can use selected bank object to get the branches as user.bankName.branches.
<select ng-model="user.branch" ng-if="user.bankName" ng-options="branch.code as branch.name for branch in user.bankName.branches">
</select>
so we can get rid of the getBranches().
here is the DEMO

"selected" attribute on select option being ignored [duplicate]

I am using Angular JS and I need to set a selected option of a dropdown list control using angular JS. Forgive me if this is ridiculous but I am new with Angular JS
Here is the dropdown list control of my html
<select ng-required="item.id==8 && item.quantity > 0" name="posterVariants"
ng-show="item.id==8" ng-model="item.selectedVariant"
ng-change="calculateServicesSubTotal(item)"
ng-options="v.name for v in variants | filter:{type:2}">
</select>
After it gets populated I get
<select ng-options="v.name for v in variants | filter:{type:2}" ng-change="calculateServicesSubTotal(item)"
ng-model="item.selectedVariant" ng-show="item.id==8" name="posterVariants"
ng-required="item.id==8 && item.quantity > 0" class="ng-pristine ng-valid ng-valid-required">
<option value="?" selected="selected"></option>
<option value="0">set of 6 traits</option>
<option value="1">5 complete sets</option>
</select>
How can I set the control for value="0" to be selected?

I hope I understand your question, but the ng-model directive creates a two-way binding between the selected item in the control and the value of item.selectedVariant. This means that changing item.selectedVariant in JavaScript, or changing the value in the control, updates the other. If item.selectedVariant has a value of 0, that item should get selected.
If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$scope.selectedOption = $scope.options[1];
HTML:
<select data-ng-options="o.name for o in options" data-ng-model="selectedOption"></select>
This would leave the "b" item to be selected.

I don't know if this will help anyone or not but as I was facing the same issue I thought of sharing how I got the solution.
You can use track by attribute in your ng-options.
Assume that you have:
variants:[{'id':0, name:'set of 6 traits'}, {'id':1, name:'5 complete sets'}]
You can mention your ng-options as:
ng-options="v.name for v in variants track by v.id"
Hope this helps someone in future.

If you assign value 0 to item.selectedVariant it should be selected automatically.
Check out sample on http://docs.angularjs.org/api/ng.directive:select which selects red color by default by simply assigning $scope.color='red'.

i see here already wrote good answers, but sometime to write the same in other form can be helpful
<div ng-app ng-controller="MyCtrl">
<select ng-model="referral.organization" ng-options="c for c in organizations"></select>
</div>
<script type='text/javascript'>
function MyCtrl($scope) {
$scope.organizations = ['a', 'b', 'c', 'd', 'e'];
$scope.referral = {
organization: $scope.organizations[2]
};
}
</script>

Simple way
If you have a Users as response or a Array/JSON you defined, First You need to set the selected value in controller, then you put the same model name in html. This example i wrote to explain in easiest way.
Simple example
Inside Controller:
$scope.Users = ["Suresh","Mahesh","Ramesh"];
$scope.selectedUser = $scope.Users[0];
Your HTML
<select data-ng-options="usr for usr in Users" data-ng-model="selectedUser">
</select>
complex example
Inside Controller:
$scope.JSON = {
"ResponseObject":
[{
"Name": "Suresh",
"userID": 1
},
{
"Name": "Mahesh",
"userID": 2
}]
};
$scope.selectedUser = $scope.JSON.ResponseObject[0];
Your HTML
<select data-ng-options="usr.Name for usr in JSON.ResponseObject" data-ng-model="selectedUser"></select>
<h3>You selected: {{selectedUser.Name}}</h3>

It can be usefull. Bindings dose not always work.
<select id="product" class="form-control" name="product" required
ng-model="issue.productId"
ng-change="getProductVersions()"
ng-options="p.id as p.shortName for p in products">
</select>
For example. You fill options list source model from rest-service. Selected value was known befor filling list and was set. After executing rest-request with $http list option be done. But selected option is not set. By unknown reasons AngularJS in shadow $digest executing not bind selected as it shuold be. I gotta use JQuery to set selected. It`s important! Angular in shadow add prefix to value of attr "value" for generated by ng-repeat optinos. For int it is "number:".
$scope.issue.productId = productId;
function activate() {
$http.get('/product/list')
.then(function (response) {
$scope.products = response.data;
if (productId) {
console.log("" + $("#product option").length);//for clarity
$timeout(function () {
console.log("" + $("#product option").length);//for clarity
$('#product').val('number:'+productId);
//$scope.issue.productId = productId;//not work at all
}, 200);
}
});
}

Try the following:
JS file
this.options = {
languages: [{language: 'English', lg:'en'}, {language:'German', lg:'de'}]
};
console.log(signinDetails.language);
HTML file
<div class="form-group col-sm-6">
<label>Preferred language</label>
<select class="form-control" name="right" ng-model="signinDetails.language" ng-init="signinDetails.language = options.languages[0]" ng-options="l as l.language for l in options.languages"><option></option>
</select>
</div>

This is the code what I used for the set selected value
countryList: any = [{ "value": "AF", "group": "A", "text": "Afghanistan"}, { "value": "AL", "group": "A", "text": "Albania"}, { "value": "DZ", "group": "A", "text": "Algeria"}, { "value": "AD", "group": "A", "text": "Andorra"}, { "value": "AO", "group": "A", "text": "Angola"}, { "value": "AR", "group": "A", "text": "Argentina"}, { "value": "AM", "group": "A", "text": "Armenia"}, { "value": "AW", "group": "A", "text": "Aruba"}, { "value": "AU", "group": "A", "text": "Australia"}, { "value": "AT", "group": "A", "text": "Austria"}, { "value": "AZ", "group": "A", "text": "Azerbaijan"}];
for (var j = 0; j < countryList.length; j++) {
//debugger
if (countryList[j].text == "Australia") {
console.log(countryList[j].text);
countryList[j].isSelected = 'selected';
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<label>Country</label>
<select class="custom-select col-12" id="Country" name="Country" >
<option value="0" selected>Choose...</option>
<option *ngFor="let country of countryList" value="{{country.text}}" selected="{{country.isSelected}}" > {{country.text}}</option>
</select>
try this on an angular framework

JS:
$scope.options = [
{
name: "a",
id: 1
},
{
name: "b",
id: 2
}
];
$scope.selectedOption = $scope.options[1];

Angular model fails to update after select option is filtered out

Trying to figure out why the model does not update when the bound selected option no longer exists. I would expect the model's property to update to undefined/null/empty string.
Situation: One select drives another select using filter. After selections are made, go to the original select and choose another option. Filter will remove the second select option as expected, but the model property on the second select will be unchanged.
Problem: When you go to pass the model, it will be populated with bad/previous values. In addition, using Angular validation, the select being required...the form is technically "valid" because the model has a value (the previous value) for the property.
HTML:
<select name="Category" ng-model="selectedCategory"
ng-options="item.name as item.name for item in categories">
<option value="">All Categories</option>
</select>
<select name="SubCategory" ng-model="selectedSubCategory"
ng-options="item.name as item.subCategory for item in categories | filter:selectedCategory">
<option value="">All SubCategories</option>
</select>
Model:
app.controller('MainCtrl', function($scope) {
$scope.categories = [{
"id": "1",
"name": "Truck",
"subCategory": "Telescope"
}, {
"id": "2",
"name": "Truck",
"subCategory": "Hazmat"
}, {
"id": "3",
"name": "Van",
"subCategory": "Mini"
}];
});
I'm fairly certain I could tie an ng-change function to the first to force it to update the model, but is there a better way?
Example Plunker demonstrating the problem

Try this way:
$scope.$watch('selectedCategory', function(selectedCategory){
$scope.selectedSubCategory = null;
});

Angular driving one Select from another. Second select showing only a single result

I have the code below and I am attempting to drive one select box from another but the subcategory select only shows one item at a time and it should show every item that has the parent category. For example, if Truck is selected in Category, Subcategory should show Telescope and Hazmat and If I choose Van, then subcategory would only have mini. What the heck am I doing wrong here?
<select name="Category" ng-model="selectedCategory"
ng-options="item.id as item.name for item in categories | unique:'name' | orderBy:'name'" ng-change="">
<option value="" disabled selected>All Categories</option>
</select>
<select name="SubCategory" ng-model="selectedSubCategory" ng-options="item.id as item.subCategory for item in categories | filter:selectedCategory | orderBy:'subCategory'" >
<option value="" disabled selected>All SubCategories</option>
</select>
$scope.selectedCategory = null;
$scope.categories = [];
$scope.$watch('selectedCategory', function() {
$scope.selectedSubCategory = null;
});
$http({
method: 'GET',
url: 'test.php?option=com_ajax&type=Category&format=json',
data: { }
}).success(function (result) {
$scope.categories = result;
});
...
{
"id": "1",
"name": "Truck",
"subCategory": "Telescope"
},
{
"id": "2",
"name": "Truck",
"subCategory": "Hazmat"
},
{
"id": "3",
"name": "Van",
"subCategory": "Mini"
}

Looking into the code I guess the ngModel selectedCategory will have the item.id and id is unique for all the items but you want to filter by item.name in the subcatagories
So one way will be to modify the parent select as below,
<select name="Category" ng-model="selectedCategory"
ng-options="item.name as item.name for item in categories">
<option value="">All Categories</option>
</select>
Sample Demo: http://plnkr.co/edit/E45B50eFmxRaep5WiWKW?p=preview