如果定义了变量，则在angular中设置类？

I'm trying to set the class "expanded" to a div if the variable is undefined. I attempted this, but had no success. What am I doing wrong?

如果变量未定义,我正在尝试将类“扩展”设置为div。我试过这个,但没有成功。我究竟做错了什么?

{'expanded': typeof member != 'undefined'}

2 个解决方案

You can do it easier:

你可以更容易地做到:

 ng-class="{'expanded':  member != undefined}"

or even:

ng-class="{'expanded':  member }"

Place your condition inside a function in the scope.

将您的条件放在范围内的函数中。

You can do it easier:

你可以更容易地做到:

 ng-class="{'expanded':  member != undefined}"

or even:

ng-class="{'expanded':  member }"

Place your condition inside a function in the scope.

将您的条件放在范围内的函数中。