Find elements in two JavaScript arrays

Question

<script>
var array1 = ['2023-04-05','2023-04-06','2023-04-07'];    //array1
var array2 = ['2023-04-07'];    //array2
found1 = array1.find((val, index) => {    //在array1中查找日期
    return array2.includes(val);
});
$('.show').html(found1);
</script>

The result is 2023-04-07. How to get results similar to 2023-04-05, 2023-04-06

Answer 1

You can use Array#filter to get all elements in the first array that are not in the second array.

let array1 = ['2023-04-05','2023-04-06','2023-04-07'];
let array2 = ['2023-04-07'];
let res = array1.filter(x => !array2.includes(x));
console.log(res);