DOM: insertAdjacentElement

node.insertAdjacentElement(position, new_node)

Move node new_node to a position around node node.

position is a string, and must be one of:

• "beforebegin" → Before node.
• "afterend" → After node.
• "afterbegin" → As first child of node.
• "beforeend" → As last child of node.

Return the element inserted, or null if failed.

// create new node <p>hi</p>
const y = document. createElement("p");
y.textContent = "hi";

// a existing node
const x = document. getElementsByTagName ('p')[0] ;

// insert after
x. insertAdjacentElement("afterend", y);

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