Replace white spaces only at the beginning and end of a sentence

Question

Does anyone know how to replace white spaces in the beginning and end of the string with &nbsp using regular expression and javascript;

Example:

`   Hello World. The white spaces in between the sentence should not be replaced. Only the start and end should be replaced with &nbsp.   `

After replacing:

`&nbsp;&nbsp;&nbsp;Hello World. The white spaces in between the sentence should not be replaced. Only the start and end should be replaced with &nbsp.&nbsp;&nbsp;&nbsp;`

Possible duplicate of [How to replace all occurrences of a string in JavaScript](https://stackoverflow.com/questions/1144783/how-to-replace-all-occurrences-of-a-string-in-javascript) — Salek, Feb 05 '19 at 08:09

Code Maniac · Accepted Answer · 2019-02-05T08:15:55.233

You need to first capture the space and than in callback function of replace you can add the no. of   based on length of match.

^\s+ - Matches spaces at the start of string.
| - Alternation same as logical OR.
\s+$ - Matches spaces at the end of string

let str = `   Hello World. The white spaces in between the sentence should not be replaced. Only the start and end should be replaced with &nbsp.   `

let op = str.replace(/^\s+|\s+$/g, function(match){
  return `&nbsp;`.repeat(match.length)
})

console.log(op)

Replace white spaces only at the beginning and end of a sentence

1 Answers1