How to add default --select— field in using ng-options in angularjs

Question

我需要--select--字段作为带有ng-options的默认值

 <select ng-model="editedField.operator" ng-options="operator as operator for operator in opConditions"></select>

Answer 1

use like this

 <select ng-model="editedField.operator" ng-options="operator as operator for 
 operator in opConditions">
<option value>Select</option>
</select>