如何在Javascript中合并具有相同值的数组

const arr1 = [1, 2, 3];
const arr2 = [3, 4, 5];
const mergedArray = arr1.concat(arr2);
console.log(mergedArray); // 输出 [1, 2, 3, 3, 4, 5]

const arr1 = [1, 2, 3];
const arr2 = [3, 4, 5];
const mergedArray = [...arr1, ...arr2];
console.log(mergedArray); // 输出 [1, 2, 3, 3, 4, 5]

const arr1 = [1, 2, 3];
const arr2 = [3, 4, 5];
const mergedArray = Array.from(new Set([...arr1, ...arr2]));
console.log(mergedArray); // 输出 [1, 2, 3, 4, 5]

const arr1 = [1, 2, 3];
const arr2 = [3, 4, 5];
const mergedArray = arr1.reduce((acc, curr) => {
  if (!acc.includes(curr)) {
    acc.push(curr);
  }
  return acc;
}, arr2);
console.log(mergedArray); // 输出 [1, 2, 3, 4, 5]