ng级一次绑定 [英] ng-class one time binding

问题描述

我想知道是否可能有一个绑定了一次绑定类和每个摘要循环进行评估的ng类.

I'm wondering if it's possible to have a ng-class with class one time binded and class which are evaluated each digest cycle.

<div ng-class="{'one_time_binded_class': isMonkey(), 'not_one_time_binded_class': isUnicorn()}"></div>

我知道我可以一次将完整的ng-class与ng-class="::{...}"绑定 但是我需要一次绑定一个特定的表达式

I know I can one time bind the complete ng-class with ng-class="::{...}" but my need is to one time bind a particular expression

当然，这是行不通的:

<div ng-class="{'my_static_class': ::isMonkey(), 'my_dynamic_class': isUnicorn()}"></div>

有办法吗?

推荐答案

方法1:

class="some-class {{::expression ? 'my-class' : ''}}"

方法2:

ng-class="::{'my-class': expression}"

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