如何查找同时匹配两个数组的所有数组元素

function findMatchingElements(arr1, arr2) {
  var result = [];
  
  for (var i = 0; i < arr1.length; i++) {
    for (var j = 0; j < arr2.length; j++) {
      if (arr1[i] === arr2[j]) {
        result.push(arr1[i]);
        break;
      }
    }
  }
  
  return result;
}

// 示例用法
var array1 = [1, 2, 3, 4, 5];
var array2 = [4, 5, 6, 7, 8];
var matchingElements = findMatchingElements(array1, array2);
console.log(matchingElements); // 输出 [4, 5]