496. Next Greater Element I -From leetcode

nextGreaterElement_1.js

/**
 * @param {number[]} findNums
 * @param {number[]} nums
 * @return {number[]}
 */
var nextGreaterElement = function(findNums, nums) {
    const fNLength = findNums.length;
    const nLength = nums.length;
    let outPut = [];
    
    
    findNums.forEach(function(i,index){
        const numIndex = nums.indexOf(i);
        let foundAGreater=false;
        for(var it=numIndex+1; it<=nLength; it++){
            if(i<nums[it]){ outPut.push(nums[it]); foundAGreater=true; break;}
        }
        if(!foundAGreater){outPut.push(-1)}
    });
    
    return outPut;
};

Input: nums1 = [4,1,2], nums2 = [1,3,4,2].
Output: [-1,3,-1]
if subset from index = 1 begin, the position would begin index =1 at the parent set yet,which make output[1] = 3
so,your code var it=numIndex+1,should change to var it=numIndex