How to use ng-class binding one more class to one value

Question

I want to bind one more class to a value, like this:

ng-class="{first: isTrue, second: isTrue, third: isTrue}"

Is ng-class Exists any usage can bind them in once, like this? (below code is not working)

ng-class="{[first, second, third]: isTrue}"

Answer 1

It turns out that property name in the single quotes will directly be added to the class when value is true.

ng-class="{'first second third': isTrue}"

works.