I am trying to have a select drop down display the first option as a placeholder value
The following code works
<form (ngSubmit)="citySubmit(f)" #f="ngForm">
<select>
<option value="" disabled selected>Select Your City</option>
<option *ngFor="let c of cities" [value]="c">{{c}}</option>
</select>
</form>
however the following code does not
<form (ngSubmit)="citySubmit(f)" #f="ngForm">
<select
[ngModel]="city">
<option value="" disabled selected>Select Your City</option>
<option *ngFor="let c of cities" [value]="c">{{c}}</option>
</select>
</form>
which leads me to believe I am using the ngmodel incorrectly.
Can I have some guidance please.
It should be,
Change
From
<select [ngModel]="city">
To
<select [(ngModel)]="city">
Related
here my code
<select class="form-control"
aria-placeholder="select auth type" id="auth_type"
[(ngModel)]="authenticationType"
name="auth_type"
#auth_type="ngModel"
(change)="changeAuthenticationType($event)" required>
<option [ngValue]="undefined" disabled selected>{{'AUTHENTICATION_CONFIGURATION.SELECT_TYPE' | translate}}
</option>
<option value="ALIGNOR_AUTHENTICATION">ALIGNOR AUTHENTICATION</option>
<option value="COGNITO_AUTHENTICATION">COGNITO AUTHENTICATION</option>
</select>
You have not done it by the recommended way of doing it.
Refer this demo code to see how it done. I would recommend to do it this way.
<select [(ngModel)]="selectedItem">
<option *ngFor="let item of items" [ngValue]="item">{{item.value}}</option>
</select>
You can make changes in your code accordingly.
I have a html form which has a dropdown consisting of a few values. If the user does not select an option and moves to the next field, I need to give an error message. I have used the required attribute but it does not fire in Chrome and Firefox.
This is my code :
<select name="gender" id="gender" style="max-width:100%" required>
<option value="">Select Gender</option>
<option value="Male">Male</option>
<option value="Female">Female</option>
<option value="Other">Other</option>
</select>
The required attribute does not work on Chrome and Firefox. A JavaScript solution would also be good. At the time of submitting the data I am checking for empty fields but I would like to display an error message if the user does not select a value from the dropdown and moves to the next field.
Use below code, not need any script, use form tag
<!DOCTYPE html>
<html>
<body>
<form>
<select required>
<option value="">None</option>
<option value="demo">demo</option>
<option value="demo1">demo1</option>
<option value="demo2">demo2</option>
<option value="demo3">demo3</option>
</select>
<input type="submit">
</form>
</body>
</html>
Try using the onfocusout option on your select paired with some Javascript.
HTML
<select name="gender" id="gender" onfocusout="check()" style="max-width:100%" required>
<option value="">Select Gender</option>
<option value="Male">Male</option>
<option value="Female">Female</option>
<option value="Other">Other</option>
</select>
JS
function check(){
var x = document.getElementById("gender").selectedOptions[0].label;
if(x == "Select Gender"){
alert("Please select an option.");
}
}
CodePen.io: https://codepen.io/anon/pen/XQxQgw
There's undoubtedly a more efficient way of doing this and you would need to tweak the JS to check if all fields have been completed etc. but that's my two cents in a pinch!
is there any reason why this simple code won't work? I'm trying to have a placeholder on my select, but it simply shows as one of the other options in the list.
<div *ngFor="let d of formDatiRichiesta" class="form-row">
<select *ngIf="d.type=='select'"
class="form-control"
name="{{d.name}}"
[(ngModel)]="model[d.name]"
required>
<option selected disabled>{{d.placeholder}}</option>
<option *ngFor="let b of elencoBanche" value="{{b.id}}">{{b.denominazione}}</option>
</select>
</div>
I'm using angular4. Thanks.
--EDIT--
I found out that if I delete [(ngModel)]="model[d.name]" all works fine. Any hint?
You have to set the value of the <option> to the value of the model, because the <select> will use the value of the model as the default selection.
When the model is undefined at the beginning you can do it like this:
<option value="undefined">Please choose...</option>
That's how it is supposed to work. With the attributedisabled you can't choose it as an option.
But you could add the hidden attribute to also hide it:
<option value="" selected disabled hidden>{{d.placeholder}}</option>
<select formControlName="value" class="form-control"
style=" height: 40px">
<option [ngValue]="null" selected disabled hidden>Select</option>
<option>Save</option>
<option>Download</option>
</select>
Add this simply it will work.
<option value="" disabled>Select Category</option>
Or
<option [ngValue]="null">Select Category</option>
Html Code
<select class="form-control" id="txtcity" data-ng-model="Register.city" ng-options="item for item in dtcmbCity">
<option value="">Please Select</option>
</select>
<button type="button" ng-click="btnSet();">Set Item</button>
Js Code
$scope.Register = {city: ''};
$scope.dtcmbCity = ['Delhi','Bombay','Chennai'];
$scope.btnSet= function () {
$scope.Register.city = "Delhi"
}
My problem is when load the form the data (delhi,bombay,chennai) displayed in the select box. and then i click the set button i want to set delhi into the selection box.
thanks please help
if you are looking for setting the value attribute in the options fields same as the text value than this can help you.
Your current code .
ng-options="item for item in dtcmbCity"
Result HTML.
<select class="form-control ng-pristine ng-valid ng-touched" id="txtcity" data-ng-model="Register.city" ng-options="item for item in dtcmbCity">
<option value="" class="" selected="selected">Please Select</option>
<option label="Delhi" value="string:Delhi">Delhi</option>
<option label="Bombay" value="string:Bombay">Bombay</option>
<option label="Chennai" value="string:Chennai">Chennai</option>
</select>
if you use the track by in ng-options , html code is
ng-options="item for item in dtcmbCity track by item"
Result HTML.
<select class="form-control ng-pristine ng-valid ng-touched" id="txtcity" data-ng-model="Register.city" ng-options="item for item in dtcmbCity track by item">
<option value="" class="" selected="selected">Please Select</option>
<option label="Delhi" value="Delhi">Delhi</option>
<option label="Bombay" value="Bombay">Bombay</option>
<option label="Chennai" value="Chennai">Chennai</option>
</select>
Setting the value on button click is working fine.
Does the select element have the required attribute?
Yes you can use required attribute in HTML5. But remember, first value should be empty.
<select required>
<option value="">Please select</option>
<option value="first">First</option>
</select>
Here you get the more example:
http://dev.w3.org/html5/spec-author-view/the-select-element.html#the-select-element
Yes it has a required attribute, you can use it as follows
<select required>
<option value="" disabled selected>Choose</option>
<option value="first Option">First Option</option>
<option value="Second Option">Second Option</option>
</select>
Reference :
HTML Select required Attribute (W3C)
You can do this way to make it look better
<select required>
<option hidden="" disabled="disabled" selected="selected" value="">Select subject</option>
<option value="first Option">First Option</option>
<option value="Second Option">Second Option</option>
</select>
Yes it does, but currently it is not supported by any version of all major browsers. This includes Safari, Chrome, Firefox, and IE.
It is possible but (just Arif said above) it is important (obviously) that you use the first option without value like:
<form action="#" method="post">
<div>
<label for="State">State</label>
<select required id="State" name="State">
<option value="">Choose</option>
<option value="new">New</option>
<option value="old">Old</option>
</select>
</div>
</form>
You can see more info at: http://www.maxdesign.com.au/2012/11/03/select-required/