JSFiddle - React, Tailwind, and code Playground

JavaScript

// a number is square if its square root is an integer
function isSquare(n) {
  return Number.isInteger(Math.sqrt(n));
}

function squaresWithin(a, b) {
  var result = [];
  for (var i = a; i <= b; ++i) {
    if (isSquare(i)) {
      result.push(i);
    }
  }
  return result;
}

console.log(squaresWithin(1, 10));