ng-model 和 ng-value 之间有什么区别/不兼容? [英] What's the difference/incompatibility between ng-model and ng-value?

问题描述

据我所知，ng-model 为分配了模型的特定元素设置了值.鉴于 ng-value 与 ng-model 有何不同?

As far as i understood ng-model sets the value for that particular element in which the model is been assigned. given that how is ng-value different from ng-model?

推荐答案

与 ng-model 配合使用；对于收音机和选择，它是在选择该项目时设置为 ng-model 的值.将其用作元素的 'value' 属性的替代，该属性将始终将字符串值存储到关联的 ng-model.

It works in conjunction with ng-model; for radios and selects, it is the value that is set to the ng-model when that item is selected. Use it as an alternative to the 'value' attribute of the element, which will always store a string value to the associated ng-model.

在单选按钮的上下文中，它允许您使用非字符串值.例如，如果您的单选按钮是"和否"(或等效项)的值为真"和假"——如果您使用值"，则存储在 ng-model 中的值将成为字符串.如果您使用 'ng-value'，它们将保持为布尔值.

In the context of radio buttons, it allows you to use non-string values. For instance, if you have the radio buttons 'Yes' and 'No' (or equivalent) with values 'true' and 'false' - if you use 'value', the values stored into your ng-model will become strings. If you use 'ng-value', they will remain booleans.

但是，在 select 元素的上下文中，请注意 ng-value 仍将始终被视为字符串.要为选择设置非字符串值，请使用 ngOptions.

In the context of a select element, however, note that the ng-value will still always be treated as a string. To set non-string values for a select, use ngOptions.

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