HTML Select. Select2 + ng-click = Not working? - html

I am using AngularJS, and Select2 to create a nice dropdown menu.
I've included an ng-click in the Option tag (of the Select tag). However, the ng-click does not seem to be working when in a Select2.
<select ui-select2 >
<option ng-repeat="car in myGarage" ng-click="ride(car)">
{{car.Name}}
</option>
</select>
It also doesn't seem to work when using a normal Select tag.
How can I get them to work?
JSFiddle:

use ng-change and ng-model instead of ng-click
<select ui-select2 ng-change="ride(car)" ng-model="car">
<option ng-repeat="car in myGarage" value ={{car.Name}}>
{{car.Name}}
</option>
</select>

That is the incorrect way to use a select.
First off, there is ng-options attribute to a select that needs to be used instead of ng-repeat on the options.
Secondly, instead of using ng-click, you can assign a ng-model to the select that updates with the selected car as follows:
In your controller, you need only the following model and you can remove other models
$scope.myGarage = [
{
Name: "Toyota 86"
},
{
Name: "Hyundai Genesis Coupe"
},
{
Name: "Nissan GTR"
},
{
Name: "Veyron"
}
];
In your view, use ng-options and ng-model as follows:
<select ng-model="selectedCarUI" ng-options="car.Name as car.Name
for car in myGarage" ui-select2>
</select>
Using UI-Select2 - Car: {{selectedCarUI}}
<select ng-model="selectedCarNormal" ng-options="car.Name as car.Name
for car in myGarage">
</select>
Using Normal Select - Car: {{selectedCarNormal}}
This should now work. Here is a fiddle for the same

The OP is using angular-ui select2. The following is from the angular-iu/ui-select2 website:
"ui-select2 is incompatible with <select ng-options>. For the best results use <option ng-repeat> instead."
See the "Working with dynamic options" section at https://github.com/angular-ui/ui-select2
So ng-change is probably the best option.

I don't know if is a lit bit late but i just discover how to make it work:
1) I'm using the original Select2
<script src="http://cdnjs.cloudflare.com/ajax/libs/select2/4.0.0-rc.2/js/select2.min.js"></script>
2) the html goes as follows:
<select class="form-control js-example-basic-single"
ng-options="item.label for item in yourVector"
ng-change="yourFunction(item)" ng-model="item">
</select>
3) the script at the end of the template:
<script type="text/javascript">
$(".js-example-basic-single").select2();
</script>
it works for me :)

Related

How to display select options based on value in Angular

I want to display some options in a select list based on data in an object. For example if the data property is 0 i want to display a select option as 0 , with option to change to 1, vice versa. However in the html, no option value is played in the field. What am i doing wrong?
Here is my code:
<div class="form-group">
<label for="isVisible" class="label">Set Visibility</label>
<select *ngIf="category.isVisible === 0" class="form-select" id="isVisible" formControlName="isVisible">
<option selected value="0">Hidden</option>
<option value="1">Visible</option>
</select>
<select *ngIf="category.isVisible === 1" class="form-select" id="isVisible" formControlName="isVisible">
<option selected value="1">Visible</option>
<option value="0">Hidden</option>
</select>
</div>
Here is an example of an object i am passing to the html/view:
{
"id": 10023,
"product": "nike tiempo trainers",
"price": 55.00,
"isVisible": 1
}
Not suggest doing your approach manually, but would suggest that just provide the category.isVisible value to FormControl. The reactive form will handle it.
<select class="form-select" id="isVisible" formControlName="isVisible">
<option value="0">Hidden</option>
<option value="1">Visible</option>
</select>
Solution 1: Patch value to FormControl.
Note: This approach is not suggested if the category object is got from API.
this.form = this.fb.group({
isVisible: [this.category.isVisible],
});
Solution 2: Patch value to FormControl.
this.form.controls.isVisible.patchValue(this.category.isVisible);
Solution 3: Patch category object to FormGroup.
Note: Do consider this approach when you want to bind the whole object to the form group instead of binding each property to form control one by one.
this.form.patchValue(this.category);
Sample StackBlitz Demo

How to set Vue Core UI select value

Sorry for the beginner question, I am new to Vue.js. I am using CoreUI. Documentation/Tutorials on CoreUI+Vue are scarce.
I am using the <CForm> tag and here I have a <CSelect> tag.
<CForm #submit="test" ref="form">
<CSelect
label="Pick a name"
:options="['test', 'test1', 'test2']"
v-model="testy"
/>
<CButton type="submit" size="sm" color="primary"> Submit</CButton>
</CForm>
JavaScript:
methods: {
test(e) {
console.log("test");
debugger;
e.preventDefault();
}
}
When my breakpoint is hit and I inspect this.testy it will not return the value of the select box but instead this:
I was under the impression that putting v-model on my CSelect will expose my select box under this.* and I could somehow easily get the value (?!).
For context this is rendered in the DOM:
<select id="uid-wvkj98yh6gp" class="form-control">
<option data-key="0" value="test"> test </option>
<option data-key="1" value="test1"> test1 </option>
<option data-key="2" value="test2"> test2 </option>
</select>
My question: inside my test(e) method, how can I gather the current selected value of my select box?
In the <CSelect> API docs, it lists the value prop:
value
The value of select input. Set .sync modifier to track prop changes.
It seems they don't use v-model as expected and you probably also got an error about the value prop being incorrect.
Change your select to:
<CSelect
label="Pick a name"
:options="['test', 'test1', 'test2']"
:value.sync="testy"
/>
This way you use the .sync modifier the way the guide directs.

Is there a way to show previously selected option in a dropdown

I have a <select> element in my html page. The <option>s are given through a loop. The selected value is stored using a ng-model. This data is now push to a database. The next time that page reloads I would like the the <select> field to hold the previously selected option. Is there anyway to do it?
I have seen that ng-model generally fills text fields on it own. I tried to do the same with <select>-<option> but it doesn't work
<select ng-model="option">
<option value = "" disabled selected>---Choose an Option--</option>
<option ng-repeat = "x in option" value="x">{{x}}</option>
</select>
When selecting from an array of primitives, use the ng-options directive:
angular.module("app",[])
.controller("ctrl", function($scope) {
$scope.options=["hello","world",1,2,3];
//set previously selected option
$scope.option = "world";
})
<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app="app" ng-controller="ctrl">
<select ng-model="option" ng-options="item for item in options">
<option value = "">---Choose an Option--</option>
</select>
<br>selected={{option}}
<body>
One can select using ng-repeat with an array of objects, but not with an array of primitives. Under the hood, the <select> directive annotates each option with tracking information. It can't annotate primitives.
For more information, see
AngularJS <select> Directive API Reference - Choosing between ng-repeat and ng-options

conditions for select - HTML or Javascript/Jquery

I have the following code:
<select class="form-control" required>
<option *ngFor="let car of cars" type="text">{{car.Name}}</option>
</select>
my problem is that i can get just a name, so *ngFor fails.
is there a way in HTML to make a condition like. If not Javascript or Jquery
//There are more than 1 option
if(options.length>1){<option *ngFor="let car of cars" type="text">{{car.Name}}</option>}
//There is only an option
else {<option *ngIf="car" type="text">{{car.Name}}</option>}
Car
export class Car {
id: String;
name: [{
brand: String,
}
}]
}
JSON returns an Array[] when there are more than one element. If not, it returns an Object{} so I can not use *ngFor
Solved
The problem was in the back-end, and not in the front-end
You can use *ngIf directive like:
<select id="oneICO" class="form-control" required *ngIf="cars.length > 1">
<option *ngFor="let car of cars">{{car.Name}}</option>
</select>
<input type="text" *ngIf="cars.length < 2">{{car.Name}}</input>
Checking if a variable is an array in the template is sort of nasty How to check type of variable in ngIf in Angular2
It would be better to check if !(cars instanceof Array) and then turn it into an array in your javascript code.
In html you can use ngif in angular2
<div *ngIf="options.length>1">
<option *ngFor="let car of cars" type="text">{{car.Name}}</option>
</div>
or simple put the next code in html
<option *ngIf="options.length == 1 " type="text">{{car.Name}}</option>
cars is not a collection so you don't need any angular directives:
<select id="oneICO" class="form-control" required>
<option>{{cars.Name}}</option>
</select>
In which case, rename cars to car so that it signifies a single item.
[It is a little pointless, though, have a select with only a single option.]
Note that an option does not have a type attribute.
Your original code is fine. There's nothing wrong with it.
<select id="oneICO" class="form-control" required>
<option *ngFor="let car of cars" type="text">{{car.Name}}</option>
</select>
If you have single car, make an array of single element and it will work just fine.
cars = ['Honda']
If you have multiple cars, you'll have something like this.
cars = ['Honda', 'Toyota', 'Mitsubishi']

How to make valueLink of react work with select elements?

I've read about both react forms and react two way binding helpers.
But I can't find any saying about how to implement two-way bindings with select elements.
I've tried like:
render: {
var selectValueLink = {
value: this.state.selectedValue,
requestChange: this.handleChange
};
return (
<select valueLink={selectValueLink}>
<option value={'A'}>OPTION A</option>
<option value={'B'}>OPTION B</option>
<option value={'C'}>OPTION C</option>
</select>
);
}
but this.handleChange doesn't get fired when I manually change selected options via mouse clicks.
Is there any way to use React's valueLink nicely with select elements?
Here is an example with select element and everything seems to be working http://plnkr.co/edit/3ueB63nxJ4wwV8rSIusr.