JSFiddle - React, Tailwind, and code Playground

by Paco86

JavaScript

const str=`
1 21    3
  4 5  6
7   8 9
`;


var row = 0;
var i = 0;
var arr = str.trim().split('\n');
var res = [];
for (var i = 0; i < arr.length; i++) {
	res.push(arr[i].trim().split(/\s+/));
}

console.log(res);