find same item in 2 arrays javascipt code example

Example 1: javascript get same elments from multiple arrays

var result = arrays.shift().filter(function(v) {
    return arrays.every(function(a) {
        return a.indexOf(v) !== -1;
    });
});

Example 2: javascript find matching elements in two arrays

const intersection = array1.filter(element => array2.includes(element));