如何在ng-if中添加自定义条件？

Question

I have a pre-evaluated conditional statement to be used inside my ng-if. Something like this, in my angular code:

scope.condition = "item.chosen == true";         ---(1)

I need to use this condition in my ng-if condition, something like this:

<div ng-if="{{condition}}"></div>                ---(2)

Which would ideally be evaluated as

<div ng-if="item.chosen == true"></div>          ---(3)

This of course doesn't work. Just to clarify, I cannot directly use the code in 3 because as I mentioned the scope.condition variable is pre-evaluated and I can't be sure what the string value might be, except that it will be a valid conditional statement.

How do I achieve this?

EDIT 1:

Further clarification, the condition variable need not necessarily be item.chosen == true . It could also be something like item.count > limit or item.available == false . Basically there is no way to know for sure what the condition will be, just that it will always be a valid conditional statement in string format.

Answer 1

You have to store it like

scope.condition = item.chosen;

and then use it like

<div ng-if="condition"></div>

it will be evaluated like

<div ng-if="true"></div>

Answer 2

你可以做

<div ng-if="condition"></div> 

Answer 3

You can try with this

<div ng-if="$eval(condition)"></div>

or

//view
<div ng-if="condition"></div>

//controller
$scope.item.chosen = false;
$scope.condition = $scope.$eval('item.chose == true')