I have one scenario where i want to set default value to null
in ng-select . if user select dropdown first then on change event should check Amount
model is not null or blank afterward if Amount
model is blank then ng-select
should be set to null
In Html component
<input type="text" [(ngModel)]="Amount"/><br/><br/>
<label>Your ng-select</label><br/>
<ng-select [items]="currencyList"
bindLabel="name"
bindValue="name"
placeholder="Select Currency"
[(ngModel)]="selectedCurrency"
(change)="onChangeDropdown()">
</ng-select><br/>
In typescript on change event function
onChangeDropdown(){
if(this.Amount){
}else{
this.selectedCurrency = null;
alert("enter amount first");
}
}
here i have attach link : link for dropdown example
Even i also tested in normal html select dropdown this also show me as same output above
<select [(ngModel)]="selectedCurrency" class="form-control" (change)="onChangeDropdown()">
<option>--Select Currency--</option>
<option *ngFor="let c of currencyList" value="{{c.id}}">{{c.name}}</option>
</select>
It's only working for the first time, when I select more then once it's not working. Why this showing still INR
or other currency name on dropdown list?
Change this.selectedCurrency value to undefined or empty string
onChangeDropdown(){
if(this.Amount){
}else{
this.selectedCurrency = {};
// or this.selectedCurrency = '';
alert("enter amount first");
}
}
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