Unexpected console statement

Expected to return a value at the end of arrow function

Expected to return a value at the end of async arrow function

Unexpected unnamed function

Expected to return a value at the end of async arrow function

Expected to return a value at the end of async arrow function

Unexpected unnamed function

for..in loops iterate over the entire prototype chain, which is virtually never what you want. Use Object.{keys,values,entries}, and iterate over the resulting array

The body of a for-in should be wrapped in an if statement to filter unwanted properties from the prototype