String.prototype.split()

Try it

const str = "The quick brown fox jumps over the lazy dog.";

const words = str.split(" ");
console.log(words[3]);
// Expected output: "fox"

const chars = str.split("");
console.log(chars[8]);
// Expected output: "k"

const strCopy = str.split();
console.log(strCopy);
// Expected output: Array ["The quick brown fox jumps over the lazy dog."]

Syntax

split(separator)
split(separator, limit)

Parameters

separator

The pattern describing where each split should occur. Can be undefined, a string, or an object with a Symbol.split method — the typical example being a regular expression. Omitting separator or passing undefined causes split() to return an array with the calling string as a single element. All values that are not undefined or objects with a [Symbol.split]() method are coerced to strings.

limit Optional

A non-negative integer specifying a limit on the number of substrings to be included in the array. If provided, splits the string at each occurrence of the specified separator, but stops when limit entries have been placed in the array. Any leftover text is not included in the array at all.

• The array may contain fewer entries than limit if the end of the string is reached before the limit is reached.
• If limit is 0, [] is returned.

Return value

If separator is a string, an Array of strings is returned, split at each point where the separator occurs in the given string.

If separator is a regex, the returned Array also contains the captured groups for each separator match; see below for details. The capturing groups may be unmatched, in which case they are undefined in the array.

If separator has a custom [Symbol.split]() method, its return value is directly returned.

Description

If separator is a non-empty string, the target string is split by all matches of the separator without including separator in the results. For example, a string containing tab separated values (TSV) could be parsed by passing a tab character as the separator, like myString.split("\t"). If separator contains multiple characters, that entire character sequence must be found in order to split. If separator appears at the beginning (or end) of the string, it still has the effect of splitting, resulting in an empty (i.e., zero length) string appearing at the first (or last) position of the returned array. If separator does not occur in str, the returned array contains one element consisting of the entire string.

If separator is an empty string (""), str is converted to an array of each of its UTF-16 "characters", without empty strings on either ends of the resulting string.