material 2 Autocomplete: select option

Question

I want to call a function when an option is selected. After some search it seem that i have to use :

property optionSelections of MdAutocompleteTrigger

In the documentation : https://material.angular.io/components/component/autocomplete optionSelections Stream of autocomplete option selections.

I dont understand that , what is a stream, how to implement this ?

Answer 1

On md-option you can set "onSelect"

<md-autocomplete #auto="mdAutocomplete">
    <md-option (onSelect)="callSomeFunction()" *ngFor="let state of states" [value]="state.name">{{ state.name }}</md-option>
</md-autocomplete>

Since beta 3, functionality has changed:

<md-autocomplete #auto="mdAutocomplete">
    <md-option (onSelectionChange)="callSomeFunction()" *ngFor="let state of states" [value]="state.name">{{ state.name }}</md-option>
</md-autocomplete>