Execution of All Suffix Instructions Staying in a Grid LeetCode solution in JavaScript

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// Time: O(n^2)
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var executeInstructions = function (n, startPos, s) {
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  let answers = [];
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  for (i = 0; i < s.length; i++) {
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    let movement = 0;
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    let [row, col] = startPos;
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    for (j = i; j < s.length; j++) {
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      if (s[j] == "R") col++;
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      else if (s[j] == "L") col--;
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      else if (s[j] == "D") row++;
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      else row--;
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      if (row > n - 1 || col > n - 1 || row < 0 || col < 0) {
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        break;
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      }
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      movement++;
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    }
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    answers[i] = movement;
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  }
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  return answers;
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};