Difference between (\w+) and \w+

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.
Dear all,

I have question regarding the following code, I’m wondering what is the difference between (\w+) and without parentheses? I can’t find the info about this.
Thanks for replying.

Your code so far


let str = "one two three";
let fixRegex = /(\w+)\s(\w+)\s(\w+)/; // Change this line
let replaceText = "$3 $2 $1"; // Change this line
let result = str.replace(fixRegex, replaceText);

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15

Challenge: Use Capture Groups to Search and Replace

Link to the challenge:

2

with the parenthesis it is a capture group, and so it can be referenced with the numbers. add a console.log(result) at the end and try to remove the parenthesis and see what happens

3

Catastrophic backtracking (javascript.info)

4

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