regular expression to match many numbers in js code example

Example 1: just number regex js

// https://regex101.com/r/qyq3PG/1
// or 
/^[0-9]*$/

Example 2: javascript regex One or more occurrences of the pattern

// Regular expression 1 or more occurrences of the pattern
console.log(/'\d+'/.test("'123'")); // true
console.log(/'\d+'/.test("''")); // false

let cartoonCrying = /boo+(hoo+)+/i;
console.log(cartoonCrying.test("Boohoooohoohooo"));// true