Jump Game LeetCode solution in JavaScript

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var canJump = function (nums) {
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  let target = nums.length - 1;
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  let max = 0,
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    index = 0;
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  while (index <= target) {
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    max = Math.max(max, index + nums[index]);
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    if (max >= target) return true;
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    if (index >= max && nums[index] === 0) return false;
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    index++;
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  }
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  return false;
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};