split string based on character limit and a period

August 24, 2022

I want to split a string based on 30 character limit and the catch here is it should get broken on a period(.) or a comma(,) or a space( ). i.e., the string length of 30 or a delimiter whichever comes first. I tried with the match using regex, this splits well, but not with a delimiter.

For example, Here is my sample code.

let x='Lorem ipsum dolor sit amet. Excepteur cuptat non proident, consectetur adipiscing elite detailo';

let splitString = x.match(/.{1,30}/g);

console.log(splitString);

Here the output I get is

[
  "Lorem ipsum dolor sit amet. Ex",
  "cepteur cuptat non proident, c",
  "onsectetur adipiscing elite de",
  "tailo"
]

But I want this to happen using a comma or period or a space as a delimiter. Expected output is

[
  "Lorem ipsum dolor sit amet.",
  "Excepteur cuptat non proident,",
  "consectetur adipiscing elite",
  "detailo"
]

>Solution :

let x='Lorem ipsum dolor sit amet. Excepteur cuptat non proident, consectetur adipiscing elite detailo';

let splitString = x.match(/.{1,30}[\.\s,]/g).map(item => item.trim());
const remaining = x.replace(splitString.join(' '), '');
splitString = [...splitString, remaining.trim()]

console.log(splitString);

Edit:

I removed the trailing spaces in the substrings. Don’t know if it’s necessary but there is the exact wanted result now.