f1 = (
  a =
  //comment
  b
) => {};
  
f2 = (
  a = //comment
  b
) => {};
  
f3 = (
  a =
  b //comment
) => {};
  
f4 = // Comment
  () => {};

f5 =
  
  // Comment
  
 () => {}
  
f6 = /* comment */
  
  // Comment
  
  () => {}
  
let f1 = (
  a =
  //comment
  b
) => {};
  
let f2 = (
  a = //comment
  b
) => {};
  
let f3 = (
  a =
  b //comment
) => {};
  
let f4 = // Comment
  () => {};
  
let f5 =
  
  // Comment
  
  () => {}
  
let f6 = /* comment */
  
  // Comment
  
  () => {}