JavaScript Split
split() breaks a string into an ordered array of substrings, cutting at every occurrence of the separator you pass. It is one of the most-used string methods in JavaScript and the natural first link in a data pipeline: split, then map, then join.
Syntax
str.split(separator)Examples
| Input | Arguments | Output |
|---|---|---|
| "a,b,c" | "," | ["a","b","c"] |
| ↳ Split a CSV row into fields. | ||
| "hello world" | " " | ["hello","world"] |
| ↳ Split a sentence into words. | ||
| "abc" | "" | ["a","b","c"] |
| ↳ Empty separator splits every character. | ||
When to use it
- Parse CSV / delimited data into arrays.
- Tokenise a sentence into words for counting or filtering.
- Turn a string into characters to reverse or shuffle it.
Gotchas
- Passing no separator returns the whole string in a single-element array: ["a,b,c"].
- A regex separator is allowed and powerful: str.split(/\s+/) splits on any run of whitespace.
Try it live
Type your input and see Split transform it instantly.
Want to go further? Chain Split with other functions in the visual Playground — pipe one output into the next and watch your data transform.