Why is split in JavaScript not a function?

Question

console.log(str);

Answer 1

Str is a string?

Answer 2

Output the type of your str to see
split is a string method

Answer 3

Is str itself not a string? split is a method in a string

Answer 4

Confirm whether str is a String Object. Split is a function, that’s right

Answer 5

split() is a method of String. The str you print out is obviously an array

Answer 6

Your str is not a string type number, and the split method does not exist in arrays.

Answer 7

It should be a method under a certain class, a method under string. Can’t be taken out separately, use it directly

Answer 8

Convert arr to string, then use this method

Answer 9

You should first convert arr to string and then use split