How would you extract a part (pattern) of a string in javascript

Question

I have a string like this "Token: 1830-5868-4807-2907-3850, Units: 36.2, Debt Amount: 0.00, Debt Remaining: 0, Recept No: 84657081"

I want to get just this 1830-5868-4807-2907-3850

Answer 1

Use slice method:

const str = "Token: 1830-5868-4807-2907-3850, Units : 36.2, Debt Amount : 0.00, Debt Remaining : 0, Recept No: 84657081"

const result = str.slice(6, 31)

console.log(result) // output: '1830-5868-4807-2907-3850'

Answer 2

You can use a (non-greedy) regex to grab the sequence between "Token: " and the first comma:

const str = "Token: 1830-5868-4807-2907-3850, Units : 36.2, Debt Amount : 0.00, Debt Remaining : 0, Recept No: 84657081";
const token = str.match('Token: (.*?), .*')[1];

Answer 3

Assuming you will have only one sub string matching the pattern you can use string.match

 const paragraph = "Token: 1830-5868-4807-2907-3850, Units: 36.2, Debt Amount: 0.00, Debt Remaining: 0, Recept No: 84657081"; const regex = /\d{4}-\d{4}-\d{4}-\d{4}-\d{4}/g; const found = paragraph.match(regex); console.log(found[0]);