Binds the given expression to the value of <option> or input[radio], so that when the element is selected, the ngModel of that element is set to the bound value.

ngValue is useful when dynamically generating lists of radio buttons using ngRepeat, as shown below.

Likewise, ngValue can be used to generate <option> elements for the select element. In that case however, only strings are supported for the valueattribute, so the resulting ngModel will always be a string. Support for select models with non-string values is available via ngOptions.