What's the correct way to use setif()?

[GalinhaLX]

Hi,

On this codepen
I'm trying to use the shortcut of

<button mv-action="if(quantity > 0, set(quantity, quantity - 1))">removes 1</button>

with setif()

<button mv-action="setif(quantity > 0, quantity - 1)">Should remove 1 if quantity is bigger than 0 </button>

which doesn't work

what's the correct way to tell mavo, which property it should apply the new value?

[DmitrySharabin]

Hey there,

The correct form of the setif() action is: setif(condition, property, expression). So, you just add the new (third) condition argument before the exsisting two arguments of the set() action (and rename the action, of course 😊).

In your case, it would look like this: setif(quantity > 0, quantity, quantity - 1).