Angular 4 setting selected option in Dropdown

Question

several questions about this and diffrent answeres. But none of them realy answeres the question. So again:

Setting default of a Dropdown select by value isnt workin

Answer 1

If you want to select a value as default, in your form builder give it a value :

this.myForm = this.FB.group({
    mySelect: [this.options[0].key, [/* Validators here */]]
});

Now in your HTML :

    
        ANY TEXT YOU WANT HERE
    

What my code does is giving your select a value, that is equal to the first value of your options list. This is how you select an option as default in Angular, selected is useless.