Regular expression for js password validation?

Question

JavaScript

let string = 'password123'
let pattern = /что-то/
console.log(pattern.test(string)) // true

Password from 3 to 20 characters
Must contain Latin + numbers (minimum 1 digit)
What template should I write?

Answer 1

/^(?=.*\d)\w{3,20}$/m
https://regex101.com/r/H47hPN/3

Answer 2

first match valid characters and their number / ^[a-zA-Z0-9]{3,20}$ /
after match more than one digit (but not all 20) / [0-9]{1,19} /
if these two conditions are met, then :)
if not :(