console.log(str);
Str is a string?
Output the type of your str to see split is a string method
Is str itself not a string? split is a method in a string
Confirm whether str is a String Object. Split is a function, that’s right
split() is a method of String. The str you print out is obviously an array
Your str is not a string type number, and the split method does not exist in arrays.
It should be a method under a certain class, a method under string. Can’t be taken out separately, use it directly
Convert arr to string, then use this method
You should first convert arr to string and then use split
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Str is a string?
Output the type of your str to see
split is a string method
Is str itself not a string? split is a method in a string
Confirm whether str is a String Object. Split is a function, that’s right
split() is a method of String. The str you print out is obviously an array
Your str is not a string type number, and the split method does not exist in arrays.
It should be a method under a certain class, a method under string. Can’t be taken out separately, use it directly
Convert arr to string, then use this method
You should first convert arr to string and then use split