Minimum Time to Type Word Using Special Typewriter LeetCode solution in JavaScript

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var minTimeToType = function (word) {
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  let ops = 0;
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  let cur = "a";
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  for (const char of word) {
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    const diff = Math.abs(cur.charCodeAt(0) - char.charCodeAt(0));
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    if (diff > 13) {
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      ops += 26 - diff + 1;
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    } else {
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      ops += diff + 1;
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    }
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    cur = char;
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  }
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  return ops;
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};