JS判断两个数组的元素是否完全相等

1.使用ES6 新增的扩展运算符和Set新数据类型判断两个数组是否包含有相同的元素

    var arr1 = [\'green\' , \'yellow\' ,\'blue\' ,\'red\'];
    var arr2 = [\'lightlue\' , \'red\' , \'pink\'];
    var arr3 = [\'yellow\' ,\'blue\' ,\'red\', \'green\'];

    arr1.push(...arr2);
    var arrset1 = new Set(arr1);
    if([...arrset1].length == arr2.length){
        alert("arr1和arr2两个数组相等");
    }else{
        alert(\'arr1 和arr2 两个数组不相等\');
    }