How to remove specific character except for the first one using regex in JavaScript?

So, I have a string something like, asd.asd.asd.234432$$..asd888. Now I want to get a string like, .234432888. So what I want to achieve is to remove every dots except for the first one and remove every non number character.

So far I tried *string*.replace(/[^\d.]/gi, new String()). But, it does not work as expected.

>Solution :

Do a global regex match of characters:

• (?<!\..*) – find . that doesn’t have . before it at any distance (.*) using a lookbehind negative assertion. That would be the first . encountered.
• \d+ – find all numbers
• join the found characters:

const str = 'asd.asd.asd.234432$$..asd888';

console.log(str.match(/(?<!\..*)\.|\d+/g).join(''));