remove a node from the beginning of a linked list in javascript

To remove a node from the beginning of a linked list in JavaScript, we need to follow the below steps:

1. Create a variable to hold the reference to the head node of the linked list.
2. If the head node is null or undefined, then the list is empty, so we'll return null.
3. If the head node has a next property, then we'll set the head node to be the next node.
4. If the head node doesn't have a next property, then the list only contains one node. We'll set the head node to be null.
5. Return the removed node.

Here's the JavaScript code to remove a node from the beginning of a linked list:

index.tsx
function removeNodeFromBeginning(linkedList) {
  // Step 1: Save the reference to the head node
  let removedNode = linkedList.head;

  // Step 2: Check if the list is empty
  if (!removedNode) {
    return null;
  }

  // Step 3: Update the head node to the next node
  linkedList.head = removedNode.next;

  // Step 4: If the list only contains one node, set head to null
  if (!linkedList.head) {
    linkedList.tail = null;
  }

  // Step 5: Return the removed node
  return removedNode;
}
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