在 javascript 中使用正则表达式从字符串中提取 substring

Question

I am new to javascript, How to extract substring that matches a regex in a string in javascript?

For example in python:

version_regex =  re.compile(r'(\d+)\.(\d+)\.(\d+)')
line = "[2021-05-29] Version 2.24.9"
found = version_regex.search(line)
if found:
  found.group() // It will give the substring that macth with regex in this case 2.24.9

I tried these in javascript:

let re = new RegExp('^(\d+)\.(\d+)\.(\d+)$');
let x = line.match(re);

but I am not getting the version here.

Thanks in advance.

Answer 1

You can use RegExp.prototype.exec which returns an Array with the full match and the capturing groups matches:

 const input = '[2021-05-29] Version 2.24.9'; const regex = /(\d+)\.(\d+)\.(\d+)/; let x = regex.exec(input); console.log(x);