Build a Symmetric Difference Function - Build a Symmetric Difference Function

Curriculum Help
1

Tell us what’s happening:

i don’t understand how can i pass 6 and 7 test

Your code so far

const diffArray= (arr1,arr2)=>{

if (arr1.length >= arr2.length){

  return arr1.filter((element)=> !arr2.includes(element))

} else {

return arr2.filter((element)=> !arr1.includes(element))

}
}
console.log(diffArray(["pen", "book"], ["book", "pencil", "notebook"]))

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Challenge Information:

Build a Symmetric Difference Function - Build a Symmetric Difference Function

2

you are removing from arr1 the elements that are also in arr2 here. But what if arr2 have also some elements that are not in arr1?