How to split string when the value changes in JavaScript?

For this, you can use match() along with regular expression. Following is the code −

Example

var originalString="JJJJOHHHHNNNSSSMMMIIITTTTHHH"; var regularExpression=/(.)\1*/g; console.log("The original string="+originalString); var splitting=originalString.match(regularExpression); console.log("After splitting the original string="); console.log(splitting);

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo139.js.

Output

This will produce the following output −

PS C:\Users\Amit\JavaScript-code> node demo139.js The original string=JJJJOHHHHNNNSSSMMMIIITTTTHHH After splitting the original string=[    'JJJJ', 'O',    'HHHH', 'NNN',    'SSS', 'MMM',    'III', 'TTTT',    'HHH' ]