JavaScript String split()

In this tutorial, we will learn about the JavaScript String split() method with the help of examples.

The split() method divides a String into an ordered list of substrings and returns them as an array.

Example

const message = "JavaScript is fun";

// divides the message string from space let result = message.split(" ");
console.log(result); // Output: [ 'JavaScript', 'is', 'fun' ]

split() Syntax

The syntax of split() is:

str.split(separator, limit)

Here, str is a string.


split() Parameter

The split() method takes in:

  • separator (optional) - The pattern (string or regular expression) describing where each split should occur.
  • limit (optional) - A non-negative integer limiting the number of pieces to split the given string into.

split() Return Value

  • Returns an Array of strings, split at each point where the separator occurs in the given string.

Note: The split() method does not change the original string.


Example: Using split()

console.log("ABCDEF".split("")); // [ 'A', 'B', 'C', 'D', 'E', 'F' ]

const text = "Java is awesome. Java is fun.";

let pattern = "."; let newText = text.split(pattern);
console.log(newText); // [ 'Java is awesome', ' Java is fun', '' ] let pattern1 = ".";
// only split string to maximum to parts let newText1 = text.split(pattern1, 2);
console.log(newText1); // [ 'Java is awesome', ' Java is fun' ] const text2 = "JavaScript ; Python ;C;C++";
let pattern2 = ";"; let newText2 = text2.split(pattern2);
console.log(newText2); // [ 'JavaScript ', ' Python ', 'C', 'C++' ] // using RegEx
let pattern3 = /\s*(?:;|$)\s*/; let newText3 = text2.split(pattern3);
console.log(newText3); // [ 'JavaScript', 'Python', 'C', 'C++' ]

Output

[ 'A', 'B', 'C', 'D', 'E', 'F' ]
[ 'Java is awesome', ' Java is fun', '' ]
[ 'Java is awesome', ' Java is fun' ]
[ 'JavaScript ', '  Python ', 'C', 'C++' ]
[ 'JavaScript', 'Python', 'C', 'C++' ]

Note: If the separator is a regular expression with capturing parentheses, then each time the separator matches, the results of the capturing parentheses are spliced into the output array.


Recommended Reading: JavaScript Array join()

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