Find the second largest element from array in javascript (Hackerrank problem)

Function Description

Complete the getSecondLargest function in the editor below.

getSecondLargest has the following parameters:

• int nums[n]: An array of integers number. (The largest number may be dublicate)

Returns

• The second largest number

function getSecondLargest(nums) {
    // Complete the function
    let sLargest=-1;
    let fLargest = 0;  
    
    for(let i=0; i<nums.length; i++) {
        if(nums[i]> fLargest) {
            sLargest= fLargest;
            fLargest = nums[i];
        } 
         if(nums[i]> sLargest && nums[1] < fLargest) {
            sLargest=nums[i]
        }
    }    

    return sLargest;
    
}

const secondLargestElement = getSecondLargest([2,6,3,90,3,2,67,78])
 console.log(secondLargestElement)