typescript - An issue with angular 4 select element behavior on selecting an option -


i building angular 4 (v4.2.5 cli) app , have encountered following issue:

i using select element in following manner:

<div class="col-xs-8">     <select class="col-xs-12" [(ngmodel)]="roleid" (ngmodelchange)="changeselected($event)">         <option *ngfor="let type of usertypes" [ngvalue]="type" [selected]="type.name === role">{{ type.name }}</option>     </select> </div>

essentialy wanted bind selection event specific action in component class:

changeselected(event) {     this.roleid = event.id; }

and works, when select 1 of options event fired , field "roleid" gets set. however, selected item disappears view (i remain empty option). testing solution in chrome. [ngvalue] attribute binding interferes in way [selected] attribute binding? missing something? in advance help.

when want change value of select, don't need trigger event that. delete ngmodelchange attribute, roleid property have value selected in way.


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