checking intersection between two array in javascript

working link

https://stackblitz.com/edit/js-6e4q5n

/**

* @param {number[]} nums1

* @param {number[]} nums2

* @return {number[]}

*/

var intersect = function(nums1, nums2) {

var dic={};

var arr=[];

var count=0;

if(nums2.length>=nums1.length)

{

var temp=nums1;

nums1=nums2;

nums2=temp;

}

for(var i=0;i<nums1.length;i++)

{

dic[nums1[i]]=1;

}

console.log(dic);

for(var i=0;i<nums2.length;i++)

{

if(dic[nums2[i]])

{

arr.push(nums2[i]);

dic[nums2[i]]=0;

}

}

return arr;

};

console.log(intersect([3,2,1],[1,1]

));