Select Dropdowns in Angular 2 a built with select and option elements. You use *ngFor to loop through your values and create options and use ngModel to keep track of the value as it changes.
How can we make this a custom control within the form? So for example, instead of having <form><select>... we would have <form><mySelect>... I'm especially interested in having the select control be a multi-select control, rather than a single-select control.