将字符串中的所有指定整数返回到数组中

function extractIntegersFromString(str) {
  let tempNum = '';
  const result = [];

  for (let i = 0; i < str.length; i++) {
    if (str[i].isdigit()) {
      tempNum += str[i];
    } else if (tempNum !== '') {
      result.push(parseInt(tempNum));
      tempNum = '';
    }
  }

  if (tempNum !== '') {
    result.push(parseInt(tempNum));
  }

  return result;
}

const str = 'abc123def456ghi789';
const integers = extractIntegersFromString(str);
console.log(integers);