巧用 ES6 找出两个数组中的相同元素，代码超简洁！

const arr1 = [1,2,7,4,3,"a","d","g"]; const arr2 = [7,3,"d","g","h",3,7]; const newArr = arr1.filter(item => arr2.includes(item)); console.log(newArr); //[7, 3, "d", "g"]