如何使用javascript获取页面上所有'input stepper.js = "number"‘类型的总量和差值？

const inputs = document.getElementsByTagName('input');
const numberInputs = Array.from(inputs).filter(input => input.type === 'number' && input.getAttribute('stepper.js') === 'number');

let total = 0;
let difference = 0;

numberInputs.forEach(input => {
  const value = parseInt(input.value);
  total += value;
  difference -= value;
});

difference += total;

console.log('总量：', total);
console.log('差值：', difference);