for in JavaScript

    const jumpPermissionList = [".openadsdk.permission.TT_PANGOLIN", "com.hihonor.permission"]

   for (let x in jumpPermissionList) {
            console.log("for  x:",x)
            if (permission.includes(jumpPermissionList[x])) {
                jumpPermission = true
                console.log("includes:",jumpPermission)
            }
        }

The x printed by  console.log("for x:",x) is not a child element. but the child element index

 

This is not the same as python

Python prints out child elements