如何将两个字符或字符串数组附加到一个数组中？

function mergeArrays(arr1, arr2) {
  var mergedArray = [];
  
  for (var i = 0; i < arr1.length; i++) {
    mergedArray.push(arr1[i]);
  }
  
  for (var j = 0; j < arr2.length; j++) {
    mergedArray.push(arr2[j]);
  }
  
  return mergedArray;
}

var array1 = ['a', 'b', 'c'];
var array2 = ['d', 'e', 'f'];
var merged = mergeArrays(array1, array2);
console.log(merged); // 输出 ['a', 'b', 'c', 'd', 'e', 'f']