以下是 AngularJS API 的 ngOptions 參數說明： http://docs.angularjs.org/api/ng.directive:select

• ngOptions(optional) – {comprehension_expression=} –

  in one of the following forms:

  • for array data sources:
    • label for value in array
    • select as label for value in array
    • label group by group for value in array
    • select as label group by group for value in array
  • for object data sources:
    • label for (key , value) in object
    • select as label for (key , value) in object
    • label group by group for (key, value) in object
    • select as label group by group for (key, value) in object

  Where:

  • array / object: an expression which evaluates to an array / object to iterate over.
  • value: local variable which will refer to each item in the array or each property value of object during iteration.
  • key: local variable which will refer to a property name in object during iteration.
  • label: The result of this expression will be the label for <option> element. The expression will most likely refer to the value variable (e.g. value.propertyName).
  • select: The result of this expression will be bound to the model of the parent <select> element. If not specified, select expression will default to value.
  • group: The result of this expression will be used to group options using the <optgroup> DOM element.