LeetCode 162 Javascript

/**
 * @param {number[]} nums
 * @return {number}
 */
var findPeakElement = function(nums) {
    let len = nums.length;
    if(len < 2) {
        return 0;
    }
    for(let i = 0; i < len; ++i) {
        if((nums[i] > nums[i - 1] || i === 0) && (nums[i] > nums[i + 1] || i === (len - 1))) {
            return i;
        }
    }
};