Confusion regarding Spread Operator in JS

So basically I have list of objects. I am iterating and have to change one property of the object. I have two scenarios, in one I have to change the property of a particular object.

 setList(list.map((list_item)=>
      list_item.id===id?{...list_item,doubleClick:true}:list_item
    )

And there is another scenario where I have to change the property of every object in the list.

setList(list.map((list_item)=>{...list_item,doubleClick:false}))

The first case is working fine but the second case is throwing error >Parsing error: Unexpected token (34:35)

To me they don’t look that different except first one has ternary operator? Is that what’s making a difference?
How to fix the second case?

Edit: So I think spread operator works with an expression or declaration.

setList(list.map((list_item)=>list_item={...list_item,doubleClick:false}))

This works.
Is there any better or correct way to do it?