在JS中查找两个字符串之间长度大于1个字符的公共子串

function findCommonSubstrings(str1, str2) {
  let commonSubstrings = [];
  for (let i = 0; i < str1.length; i++) {
    for (let j = 0; j < str2.length; j++) {
      let substring = "";
      let k = i;
      let l = j;
      while (str1[k] === str2[l]) {
        substring += str1[k];
        k++;
        l++;
        if (k >= str1.length || l >= str2.length) {
          break;
        }
      }
      if (substring.length > 1) {
        commonSubstrings.push(substring);
      }
    }
  }
  return commonSubstrings;
}

// 调用函数并输出结果
let str1 = "abcdefg";
let str2 = "xyzcdefg123";
let result = findCommonSubstrings(str1, str2);
console.log(result);