Find All K-Distant Indices in an Array LeetCode solution in JavaScript

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/**
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 * @param {number[]} nums
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 * @param {number} key
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 * @param {number} k
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 * @return {number[]}
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 */
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var findKDistantIndices = function (nums, key, k) {
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  let ind = [];
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  let ans = [];
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  nums.forEach((val, i) => {
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    if (val == key) {
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      ind.push(i);
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    }
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  });
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  let temp = new Set();
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  for (let i = 0; i < ind.length; i++) {
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    let mn = Math.max(ind[i] - k, 0);
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    let mx = Math.min(Math.abs(ind[i] + k), nums.length - 1);
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    for (let j = mn; j <= mx; j++) {
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      temp.add(j);
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    }
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  }
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  return [...temp];
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};