I solved the problem TWO SUM

/**
* @param {number[]} nums
* @param {number} target
* @return {number[]}
*/
const twoSum = function(nums, target) {
const map = new Map();
for(let i = 0; i < nums.length; i++) {
const complement = target - nums[i];
if(map.has(complement)) {
return [map.get(complement), i];
}
map.set(nums[i], i);
}
return [];
};

JS

/**

 * @param {number[]} nums

 * @param {number} target

 * @return {number[]}

 */

const twoSum = function(nums, target) {

    const map = new Map();

    for(let i = 0; i < nums.length; i++) {

        const complement = target - nums[i];

        if(map.has(complement)) {

           return [map.get(complement), i];

        }

        map.set(nums[i], i);

    }

    return [];

};