如何在 JavaScript 中获取两个数组之间的差异？

有以下两个数组

var arr1 = ['a', 'b', 'c'];
var arr2 = ['b', 'c', 'd'];

let difference = arr1.filter(x => !arr2.includes(x)); //['a']

let intersection = arr1.filter(x => arr2.includes(x)); // ['b', 'c']

let difference2 = arr1 .filter(x => !arr2.includes(x)) .concat(arr2.filter(x => !arr1.includes(x))); //['a', 'd']

参考：SO