[Vuejs]-Arr.push inside For-loop

In the comments you mentioned your goal:

“this.list[i].path does not exist, that is what Im trying to create”

…if you literally want to add a property called “path” directly under the object at this.list[i] then you’d write

this.list[i].path = '/testPath'

This will create a new property for the object being held at this.list[i].

P.S.

You don’t need your (badly-named) arr variable at all here.

Using .push() doesn’t make any sense (and doesn’t work) because this.list[i] contains an object rather than an array, and also doing that wouldn’t create a property as you wanted.